Consortional main: The Standard Model and beyond: Searching for New Physics with the CERN LHC CMS experiment  Page description

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Details of project

 
Identifier
124845
Type K
Principal investigator Pásztor, Gabriella
Title in Hungarian Konzorcium, fő p.: A Standard Modellen innen és túl: Új fizika keresése a CERN LHC CMS kísérletével
Title in English Consortional main: The Standard Model and beyond: Searching for New Physics with the CERN LHC CMS experiment
Keywords in Hungarian CERN CMS Elektrogyenge Higgs LHC Szuperszimmetria Vektor-bozon Luminozitás Nyomkövetés HL-LHC
Keywords in English CERN CMS Supersymmetry Electroweak Higgs LHC Vector-boson Luminosity Tracking Grid Tracker Pixel BRIL HL-LHC Upgrade
Discipline
Particle Physics (Council of Physical Sciences)100 %
Panel Physics 1
Department or equivalent Department of Atomic Physics (Eötvös Loránd University)
Participants Bartók, Márton
Chudasama, Ruchi
Filipovic, Nicolas
Mandal, Koushik
Mehta, Ankita
Stickland, David Peter
Surányi, Olivér
Veres, I. Gábor
Starting date 2017-10-01
Closing date 2023-01-31
Funding (in million HUF) 24.000
FTE (full time equivalent) 16.04
state closed project
Summary in Hungarian
A kutatás összefoglalója, célkitűzései szakemberek számára
Itt írja le a kutatás fő célkitűzéseit a témában jártas szakember számára.

Az Európai Nukleáris Kutatási Szervezet (CERN) Nagy Hadronütköztetője (LHC) rekord 13 TeV tömegközéponti energiájú proton - proton ütközéseket szolgáltat, ezzel egy új energiatartományt nyitva meg a részecskefizikai vizsgálódások előtt. Kutatócsoportunk ezen világélvonalbeli kutatásokban vesz részt a Higgs-bozont 2012-ben felfedező CMS nemzetközi együttműködés tagjaként.

Célunk a CMS kísérlet adatainak segítségével a Standard Modell (SM) mögött megbújó alapvető elmélet vizsgálata, a SM kiterjesztései által jósolt új jelenségek kutatása két egymást kiegészítő módszerrel: az ismert SM folyamatok pontos mérésével illetve új részecskék közvetlen keresésével.

Az elektrogyenge szimmetriasértés vizsgálata különösen ígéretes út az Új Fizika felé. A két elektrogyenge vektorbozont tartalmazó végállapotok valamint a Higgs-szektor pontos mérésével és az elmélettel való összevetésével rávilágíthatunk a SM szükséges kiterjesztésésére, akár új rezonanciák megjelenésén, akár - ezek hiányában - a nagy energiájú viselkedés anomális mértékcsatolások okozta finom változásán keresztül.

A szuperszimmetria feltételezése az egyik legsikeresebb válasz a SM hiányosságaira, amely többek között egy megfelelő sötét anyag jelöltet is adhat. Csoportunk szuperszimmetrikus partnerrészecskék párkeltésének nyomai után is kutat, elsősorban top-kvarkokat vagy Higgs-bozont tartalmazó végállapotokban.

Fizikai céljaink megvalósításához elengedhetetlen résztvételünk az adatgyűjtésben, a berendezés működtetésében és folyamatos fejlesztésében, pontosságának mérésében. Javaslatunk így kiterjed hozzájárulásunkra a CMS belső nyomkövető detektorához és a luminozitásméréshez.

Mi a kutatás alapkérdése?
Ebben a részben írja le röviden, hogy mi a kutatás segítségével megválaszolni kívánt probléma, mi a kutatás kiinduló hipotézise, milyen kérdéseket válaszolnak meg a kísérletek.

A Standard Modell (SM) remekül leírja a laboratóriumban észlelt jelenségeket, ám számos kérdést hagy megválaszolatlanul. Mi a világegyetemet betöltő sötét anyag? Miért gyenge a gravitációs kölcsönhatás az ismert mértékkölcsönhatásokhoz képest? Megalkotható-e egy konzisztens elméletet, amely leírja mind a négy ismert kölcsönhatást? Ezek és hasonló kérdések arra utalnak, hogy a SM mögött egy ismeretlen Új Fizika rejtőzik.

A SM egyik legígéretesebb kiterjesztése a szuperszimmetria (SUSY) létezését posztulálja, amely a tér-idő legáltalánosabb, a fermionikus és bozonikus állapotok közti kapcsolatot megteremtő szimmetriája. Ennek következményeként minden ismert SM részecskének megjelenik egy szuperszimmetrikus párja. Ahhoz, hogy a szuperszimmetrikus kiterjesztés a hierarchia problémára megnyugtató választ adjon, a partnerrészecskék tömegének O(TeV) körül kell lennie, ami elérhetővé teszi keletkezésüket az LHC-n.

Ha az Új Fizika energiaskálája túl magasnak bizonyul új részecskék közvetlen keletkezéséhez, az LHC-n felfedezett Higgs-bozon tulajdonságainak, és az elektrogyenge vektorbozonok szórásának tanulmányozása ablakot nyithat a kiterjesztett elmélet felé. A két-bozon végállapotok pontos vizsgálata lehetőséget ad a magasabb skálájú fizikából származó anomális csatolások mérésére.

Célunk új részecskék közvetlen megfigyelése, amely egyértlemű jelét adná a SM-en túli fizika létének, illetve az anomális mértékcsatolások mérése, amely ennek hiányában információt szolgáltathat az alapvető elmélet tulajdonságairól. A differenciális hatáskeresztmetszet mérések azonban az Új Fizika jelenlététől függetlenül is fontosak a magasabb rendű perturbatív SM számolások ellenőrzéséhez.

Mi a kutatás jelentősége?
Röviden írja le, milyen új perspektívát nyitnak az alapkutatásban az elért eredmények, milyen társadalmi hasznosíthatóságnak teremtik meg a tudományos alapját. Mutassa be, hogy a megpályázott kutatási területen lévő hazai és a nemzetközi versenytársaihoz képest melyek az egyediségei és erősségei a pályázatának!

A protonok ütközéseinek vizsgálatával megérthetjük az elemi részecskék viselkedését kormányzó alapvető törvényeket és ezzel megérthetjük az Univerzum korai fejlődését, az Ősrobbanás utáni első mikromásodperceit.

Kutatásaink segítségével megválaszolhatjuk a részecske- és asztrofizika nyitott kérdéseit. Új (szuperszimmetrikus) részecskék felfedezése például lehetőséget adhat a Világegyetemet betöltő sötét anyag laboratóriumi tanulmányozására. A SM alternatív kiterjesztéseinek vizsgálatával, egyes modellek megerősítésével és mások kizárásásával közelebb juthatunk az alapvető elmélet megismeréséhez.

A technológiai újítások, amelyek a világélvonalbeli részecskefizikai kísérleti eszközök fejlesztésének velejárói a hétköznapi élet több területén is alkalmazásra találhatnak, ahogy ez a múltban is nem egyszer megtörtént.

A kísérletekbe rendszeresen bevonunk fiatal diákokat, a kutatócsoport tagjai részt vesznek a felsőoktatásban. Tudományterületünk művelésével, ismereteink, tapasztalataink, lelkesedésünk átadásával hozzájárulunk a fizika, természet- és mérnöki tudományok fejlesztéséhez és népszerűsítéséhez is.

A kutatás összefoglalója, célkitűzései laikusok számára
Ebben a fejezetben írja le a kutatás fő célkitűzéseit alapműveltséggel rendelkező laikusok számára. Ez az összefoglaló a döntéshozók, a média, illetve az érdeklődők tájékoztatása szempontjából különösen fontos az NKFI Hivatal számára.

Milyen törvények írják le a világunkat felépítő elemi részecskék viselkedését? Mi a Világegyetemünket betöltő sötét anyag? Vannak eddig felfedezetlen elemi részecskék, új kölcsönhatások, szimmetriák? Megalkotható a Mindenség Elmélete, amely közös alapokra helyezi az égi testek mozgását kormányzó gravitációt, az elektromos eszközeink működéséért felelős elektromosságot és a Nap energia termelését adó nukleáris kölcsönhatásokat?

Többek között ezeket a kérdéseket vizsgálhatjuk az Európai Nukleáris Kutatási Szervezet (CERN) Nagy Hadronütköztetője (LHC) mellett működő CMS kísérletben, ahol minden eddiginél nagyobb energiára gyorsított protonok ütközéseit vizsgálva a Világegyetem születése utáni néhány mikromásodpercben fennálló állapotokról is szerezhetünk új ismereteket.

Kutatócsoportunk célja az ismert részecskék tulajdonságainak tanulmányozásával és új, sosem látott jelenségek, részecskék felfedezésével hozzájárulni a mikrovilág és az Univerzum jobb megértéséhez.
Summary
Summary of the research and its aims for experts
Describe the major aims of the research for experts.

The Large Hadron Collider (LHC) at CERN, the European Organization for Nuclear Research provides proton-proton collisions at a record 13 TeV center-of-mass energy, opening a new energy regime for particle physics research. Our group participates in the world-leading CMS international collaboration that co-discovered the Higgs boson in 2012.

Our goal is to use the Run 2 CMS data to study the fundamental theory beyond the Standard Model (SM) by searching for new phenomena predicted by its various extensions with two complementary methods: the precise measurement of known SM processes and the direct search for new particles.

The study of electroweak symmetry breaking is a particularly promising way towards New Physics. The precise measurement of final states containing two electroweak vector bosons may shed light on the necessary extension of the SM, either through the appearance of new resonances, or, in their absence, through slight deviations in the high energy behavior from the theoretical predictions due to anomalous gauge couplings.

The postulation of supersymmetry is one of the best ideas to answer the deficiencies of the SM, among others it can provide a viable dark matter candidate. Our group will search for signs of pair production of supersymmetric partner particles, in particular in final states with top quarks or a Higgs boson.

To accomplish our physics goals, it is indispensable to participate in data taking, in the operation and improvement of the experimental apparatus and the measurement of its precision. Our proposal thus includes contributions to the inner tracking detector and the luminosity measurement.

What is the major research question?
Describe here briefly the problem to be solved by the research, the starting hypothesis, and the questions addressed by the experiments.

The Standard Model (SM) describes very precisely the phenomena observed in the laboratory, but leaves multiple questions unanswered. What is the dark matter that fills the Universe? Why is gravity weak compared to the other gauge interactions? Is it possible to construct a coherent theory that describes all four known interactions? These and similar questions indicate that an unknown New Physics hides beyond the SM.

One of the most promising extensions of the SM postulate the existence of supersymmetry (SUSY), the most general symmetry of space-time, linking fermionic and bosonic states. As a consequence, each SM particle gains a supersymmetric partner. Assuming that the extension provides a solution to the hierarchy problem, the partner particles are expected to have a mass in the order of TeV, which makes them susceptible to detection at the LHC.

If the energy scale of New Physics proves to be too high for the direct production of new particles, the study of the properties of the Higgs boson recently discovered at the LHC and of the scattering of electroweak vector bosons may open a window towards the extended theory. The precise study of two-boson final states allows the measurement of the anomalous couplings originating from higher-scale physics.

Our goal is the direct observation of new particles providing clear evidence of physics beyond the SM, and the measurement of anomalous couplings which - even if no new particle is seen - can provide information on the fundamental theory. The differential cross-section measurements, however, are important irrespective of the presence of New Physics to put higher order perturbative SM calculations to test.

What is the significance of the research?
Describe the new perspectives opened by the results achieved, including the scientific basics of potential societal applications. Please describe the unique strengths of your proposal in comparison to your domestic and international competitors in the given field.

Through the study of proton-proton collisions we can understand the fundamental laws governing the behavior of elementary particles, leading also to the understanding of the early Universe, the first microseconds after the Big Bang.

Our research can give answers to the open questions of particle and astrophysics. For example, the detection of new (supersymmetric) particles could allow the direct laboratory study of dark matter that fills our universe. With the study of alternative extensions of the SM, reinforcing some models and excluding others, we will get closer to the discovery of the fundamental theory.

The technological innovations that accompany the development of world-class particle physics experiments find use in multiple areas of everyday life, as it has happened many times in the past.

We often involve young students in the experiments, and the members of our research team participate in higher education. Through the cultivation of our fields of research, the transmission of our knowledge, experience and enthusiasm, we contribute to the development and popularization of physics, natural and engineering sciences.

Summary and aims of the research for the public
Describe here the major aims of the research for an audience with average background information. This summary is especially important for NRDI Office in order to inform decision-makers, media, and others.

What are the laws of nature that govern the behavior of the elementary particles that make up our world? What is the dark matter that fills our Universe? Are there undiscovered new particles, new interactions, new symmetries? Is it possible to construct the Theory of Everything that would describe in the same framework gravity that governs the movement of heavenly bodies, electricity responsible for the operation of our electrical appliances, and nuclear interactions that generate the energy in the Sun?

These are some of the questions that we study in the CMS experiment operating at the Large Hadron Collider (LHC) in the European Organization for Nuclear Research (CERN). By studying the collisions of protons accelerated to higher than ever energies we can also learn about the conditions in the first few microseconds after the birth of our Universe.

The goal of our research group is to contribute to the better understanding of the microscopic world and the Universe through the study of the properties of known particles and through the discovery of new phenomena and particles that were never seen before.





 

Final report

 
Results in Hungarian
Elektrogyenge vektorbozonpárok (VV') keletkezését, és két előre szórt nagy pszeudorapiditás különbségű hadronzáporral kísért (VV'jj) szórását tanulmányoztuk, valamint a Standard Model (SM) szuperszimmetrikus (SUSY) kiterjesztései által jósolt új nehéz részecskék megjelenését kerestük. A CERN LHC CMS kísérlet 13 TeV energián gyűjtött Run 2 adatkészletét dolgoztuk fel. Megfigyeltük Zγjj, Wγjj, WWjj elektrogyenge keletkezését 5σ feletti szignifikanciával, és bizonyítékot találtunk ZZjj keletkezésre 4σ szinten. A mért differenciális hatáskeresztmetszetek jó egyezést mutatnak a rendelkezésre álló magasabb rendű perturbatív QCD számításokkal, így szigorú felső korlátokat határoztunk meg az anomális csatolásokra egy 8 dimenziós effektív térelméletben, amely leírja az új fizika lehetséges hozzájárulását. A szuperszimmetrikus partnerrészecskék keresése R-paritás őrző modellekben nem hozott jelentős eseménytöbbletet a SM előrejelzéséhez képest, így a SUSY részecskepárok keletkezési hatáskeresztmetszetére és a partnerrészecskék (gluínók, skalár-t-kvarkok, csardzsínók és neutralínók) tömegére korlátokat adtunk meg különböző modellekben. Vezető szerepet vállaltunk a CMS detektor üzemeltetésében, kalibrálásában, teljesítményének mérésében és megújításában is, elsősorban a belső nyomkövető detektorra és a luminozitásdetektorokra koncentrálva. Precíziós luminozitás mérést végeztünk, amely elengedhetetlen a W-, Z- és Higgs-bozon, valamint a t-kvark folyamatok pontos méréséhez az LHC-n.
Results in English
We studied electroweak (EW) vector boson pair (VV’) production, and vector boson scattering tagged by two forward jets with large rapidity separation (VV’jj), as well as searched for new heavy particles arising in supersymmetric (SUSY) extensions of the Standard Model (SM). We analyzed the Run 2 data set of the CMS experiment collected at 13 TeV energy at the CERN LHC. We observed EW production of Zγjj, Wγjj, WWjj with a significance above 5σ, and found evidence for ZZjj at the 4σ level. The measured differential cross sections show good agreement with the available higher order perturbative QCD calculations, and thus stringent upper limits were derived on anomalous couplings in a dim-8 effective field theory describing possible contributions from new physics. The searches for supersymmetric partner particles in R-parity conserving models did not reveal any significant excess over the SM predictions, and thus constraints on the production cross section of SUSY particle pair production, and on the mass of the partner particles (gluinos, scalar top quarks, charginos, and neutralinos) are presented in various SuGra and GGM models. We also co-led the operation, calibration, performance evaluation and upgrade efforts of the CMS detector, focusing on the inner tracking system and the luminometers. We performed precision luminosity determination which is essential for the accurate measurements of W, Z, and Higgs boson, as well as top quark processes at the LHC.
Full text https://www.otka-palyazat.hu/download.php?type=zarobeszamolo&projektid=124845
Decision
Yes





 

List of publications

 
CMS Collaboration: Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at s√=13 TeV, CMS-HIG-17-012, CERN-EP-2018-009, arXiv:1804.01939 [hep-ex], JHEP 06 (2018) 127, 2018
CMS Collaboration: CMS luminosity measurement for the 2017 data-taking period at sqrt{s} = 13 TeV, CMS-PAS-LUM-17-004, 2018
CMS Collaboration: CMS luminosity measurement using 2016 proton-nucleus collisions at nucleon-nucleon center-of-mass energy of 8.16 TeV, CMS-PAS-LUM-17-002, 2018
CMS Collaboration: Observation of B0 → ψ(2S) K0S π+ π− and B0s → ψ(2S) K0S decays, CMS-PAS-BPH-18-004, to be submitted to EPJC, 2021
CMS Collaboration: A new calibration method for charm jet identification validated with proton-proton collision events at √s =13 TeV, CMS-BTV-20-001, CERN-EP-2021-177, arXiv:2111.03027 [hep-ex], submitted to JINST, 2021
CMS Collaboration: Study of dijet events with large rapidity separation between the jets in proton-proton collisions at √s = 2.76 TeV, CMS-FSQ-13-004, CERN-EP-2021-173, arXiv:2111.04605 [hep-ex], submitted to JHEP, 2021
CMS Collaboration: Extraction and validation of HERWIG 7 tunes from CMS underlying-event measurements, CMS-GEN-19-001, CERN-EP-2020-182, arXiv:2011.03422 [hep-ex], Eur. Phys. J. C 81 (2021) 312, 2021
CMS Collaboration: Measurement of the associated production of a W boson and a charm quark in proton-proton collisions at √s= 8 TeV, CMS-SMP-18-013, CERN-EP-2021-206, arXiv:2112.00895 [hep-ex], submitted to EPJC, 2021
CMS Collaboration: Measurements of the pp → W±γγ and pp → Zγγ cross sections at √s = 13 TeV and limits on anomalous quartic gauge couplings, CMS-SMP-19-013, CERN-EP-2021-073, arXiv:2105.12780 [hep-ex], JHEP 2110 (2021) 174, 2021
CMS Collaboration: W±γ differential cross sections and effective field theory constraints at √s = 13 TeV, CMS-SMP-20-005, CERN-EP-2021-219, arXiv:2111.13948, submitted to PRD, 2021
CMS Collaboration: Measurement of double-parton scattering in inclusive production of four jets with low transverse momentum in proton-proton collisions at √s = 13 TeV, CMS-SMP-20-007, CERN-EP-2021-171, arXiv: 2109.13822 [hep-ex], submitted to JHEP, 2021
CMS Collaboration: Study of quark and gluon jet substructure in Z+jet and dijet events from pp collisions, CMS-SMP-20-010, CERN-EP-2021-161, arXiv: 2109.03340 [hep-ex], submitted to JHEP, 2021
CMS Collaboration: Measurement of the inclusive and differential WZ production cross sections, polarization angles, and triple gauge couplings in pp collisions at √s = 13 TeV, CMS-SMP-20-014, CERN-EP-2021-163, arXiv: 2110.11231 [hep-ex], submitted to JHEP, 2021
CMS Collaboration: Strategies and performance of the CMS silicon tracker alignment during LHC Run 2, CMS-TRK-20-001-003, CERN-EP-2021-203, arXiv:2111.08757 [physics.ins-det], submitted to NIM A, 2021
CMS Collaboration: Search for supersymmetry in final states with two oppositely charged same-flavor leptons and missing transverse momentum in proton-proton collisions at √s = 13 TeV, CMS-SUS-20-001, CERN-EP-2020-231, arXiv:2012.08600 [hep-ex], JHEP 2104 (2021) 123, 2021
CMS Collaboration: Search for new physics in the lepton plus missing transverse momentum final state in proton-proton collisions at 13 TeV center-of-mass energy, CMS-PAS-EXO-19-017, to be submitted to JHEP, 2021
CMS Collaboration: Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at √s = 13 TeV, CMS-EXO-20-004, CERN-EP-2021-136, arXiv:2107.13021, JHEP 2111 (2021) 153, 2021
CMS Collaboration: Inclusive and differential cross section measurements of single top quark production in association with a Z boson in proton-proton collisions at √s = 13 TeV, CMS-TOP-20-010, CERN-EP-2021-210, arXiv:2111.02860 [hep-ex], submitted to JHEP, 2021
CMS Collaboration: Search for invisible decays of a Higgs boson produced via vector boson fusion with 138 fb−1 of proton-proton collisions at √s =13 TeV, CMS-PAS-HIG-20-003, to be submitted to PRD, 2021
CMS Collaboration: Search for heavy resonances decaying to Z(νν¯)V(qq') in proton-proton collisions at √s = 13 TeV, CMS-B2G-20-008, CERN-EP-2021-158, arXiv:2109.08268 [hep-ex], submitted to PRD, 2021
CMS Collaboration: First observation of the electroweak production of a leptonically decaying W+W− pair in association with two jets in √s =13 TeV pp collisions, CMS-PAS-SMP-21-001, to be submitted to PRL/PLB, 2021
O. Surányi: Study of Very Forward Neutrons with the CMS Zero Degree Calorimeter, CMS-CR-2019-039, Universe 2019, 5(10), 210, in Special Issue The Zimányi School and Analytic Hydrodynamics in High Energy Physics, 2019
CMS Collaboration (submitter: G. Pásztor): BRIL Phase-2 performance TDR plots for summer conferences, CMS DP-2021/016, 2021
O. Surányi et al.: Performance of the CMS Zero Degree Calorimeters in pPb collisions at the LHC, arXiv:2102.06640 [hep-ex], JINST 16 P05008 (2021), 2021
CMS Collaboration: Search for top squark production in fully-hadronic final states in proton-proton collisions at √s = 13 TeV, CMS-SUS-19-010, CERN-EP-2021-022, arXiv:2103.01290 [hep-ex], Phys. Rev. D 104 (2021) 052001, 2021
CMS collaboration: First Tracker Alignment results with 2021 cosmic ray data, CMS DP-2021/025, 2021
CMS Collaboration (edited by G. Auzinger, A. Dabrowski, P. Lujan, G. Pásztor, D. Stickland): The Phase-2 Upgrade of the CMS Beam Radiation Instrumentation and Luminosity Detectors - Technical Design Report, CERN-LHCC-2021-008 ; CMS-TDR-023, 2021
Adrienn Pataki (supervisor: Gabriella Pásztor): Új precíziós luminozitásmérő detektor modellezése, BSC Thesis, Eötvös University, 2021
Milán Fejes (supervisors: Péter Major, Gabriella Pásztor): Kísérleti adatminőség meghatározása az LHC CMS kísérletében gépi tanulási módszerrel, BSc thesis, Eötvös University, 2021
Dóra Olej (supervisor: Gabriella Pásztor): Trigger hatásfok vizsgálata szuperszimmetrikus részecskék kereséséhez a CERN LHC CMS detektorral, BSc Thesis, Eötvös University, 2021
Anna Horváth (supervisor: Gabriella Pásztor): Szuperszimmetrikus részecskék keresése, BSC Thesis, Eötvös University, 2021
Ármin Kadlecsik (supervisor: Gabriella Pásztor): Particle reconstruction improvements for soft leptons in a compressed SUSY scenario in search of new particles with the CERN LHC CMS detector, MSc Thesis, Eötvös University, 2021
Krisztián Tamás (Supervisor: Gabriella Pásztor): Search for supersymmetric particles with the CERN LHC CMS experiment: Search for chargino – neutralino associated production with machine learning, MSc Thesis, Eötvös University, 2021
Csenge Komjáti (supervisors: Ankita Mehta, Gabriella Pásztor): A proton szerkezetének vizsgálata dupla partonszórás mérésével a CERN LHC CMS kísérletében, BSc Thesis, Eötvös University, 2021
Adrienn Pataki (supervisor: Gabriella Pásztor): Új precíziós luminozitásmérő detektor modellezése, TDK dolgozat, Eötvös University, 2021
CMS Tracker Collaboration [incl. V. Veszprémi]: Beam test performance of prototype silicon detectors for the Outer Tracker for the Phase-2 Upgrade of CMS, CMS-NOTE-2022-001, JINST 15 (2020) P03014, 2020
CMS Collaboration: Performance of the CMS muon trigger system in proton-proton collisions at √s = 13 TeV, CMS-MUO-19-001, CERN-EP-2021-013, arXiv:2102.04790 [hep-ex], JINST 16 (2021) P07001, 2021
CMS Collaboration: Measurement of angular distance and momentum ratio distributions in three-jet and Z + two-jet final states in pp collisions, CMS-SMP-17-008, CERN-EP-2020-251, arXiv:2102.08816 [hep-ex], Eur. Phys. J. C 81 (2021) 852, 2021
CMS Collaboration: Measurement of the Wγ production cross section in proton-proton collisions at √s = 13 TeV and constraints on effective field theory coefficients, CMS-SMP-19-002, CERN-EP-2021-008, arXiv:2102.02283 [hep-ex], Phys. Rev. Lett. 126, 252002 (2021), 2021
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Oliver Surányi: Performance of the CMS Zero Degree Calorimeters in the 2016 pPb run, CMS-CR-2018-087, Proceedings of 18th International Conference on Calorimetry in Particle Physics, CALOR 2018, Eugene, Usa, 21 - 25 May 2018, 2018
CMS Collaboration: Measurement of inclusive and differential Higgs boson production cross sections in the diphoton decay channel in proton-proton collisions at √s= 13 TeV, CMS-HIG-17-025, CERN-EP-2018-166, arXiv:1807.03825 [hep-ex], submitted to JHEP, 2018
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CMS Collaboration: Measurement of vector boson scattering and constraints on anomalous quartic couplings from events with four leptons and two jets in proton–proton collisions at √s= 13 TeV, CMS-SMP-17-006, CERN-EP-2017-177 , arXiv:1708.02812 [hep-ex], Phys.Lett. B774 (2017) 682-705, 2017
CMS Collaboration: CMS luminosity measurement using 2016 proton-nucleus collisions at nucleon-nucleon center-of-mass energy of 8.16 TeV, CMS-PAS-LUM-17-002, 2018
CMS COllaboration: CMS luminosity measurement for the 2017 data-taking period at sqrt{s} = 13 TeV, CMS-PAS-LUM-17-004, 2018
Gábor Veres: Minimum Bias and Underlying Event Measurements at the CMS Experiment, CMS-CR-2018-120, PoS DIS2018 (2018) 036, Proc of XXVI International Workshop on Deep Inelastic Scattering and Related Subjects, DIS2018, 2018
Gábor Veres: Double Parton Scattering Measurements at the CMS Experiment, CMS-CR-2018-122, PoS DIS2018 (2018) 035, Proc. of XXVI International Workshop on Deep Inelastic Scattering and Related Subjects, DIS2018, 2018
Márton Bartók: Searches for supersymmetry in final states with photons at CMS, CMS-CR-2018-109, PoS DIS2018 (2018) 071, Proc. of XXVI International Workshop on Deep Inelastic Scattering and Related Subjects, DIS2018, 2018
CMS Collaboration: Inclusive search for supersymmetry in pp collisions at √s = 13 TeV using razor variables and boosted object identification in zero and one lepton final states, CMS-PAS-SUS-16-017 (superseeded by CMS-SUS-16-017, arXiv:1812.06302, JHEP 03 (2019) 031), 2018
Oliver Surányi: Performance of the CMS Zero Degree Calorimeters in the 2016 pPb run, CMS-CR-2018-087, J.Phys.Conf.Ser. 1162 (2019) no.1, 012005, Proc. of 18th International Conference on Calorimetry in Particle Physics, CALOR 2018, 2019
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CMS Collaboration: Measurements of properties of the Higgs boson decaying to a W boson pair in pp collisions at √s = 13 TeV, CMS-HIG-16-042, CERN-EP-2018-141, arXiv:1806.05246 [hep-ex], submitted to PLB, 2018
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CMS Collaboration: CMS luminosity measurement for the 2017 data-taking period at sqrt{s} = 13 TeV, CMS-PAS-LUM-17-004, 2018
CMS Tracker Collaboration (incl. T. Balázs, F. Siklér, T. Vámi, V. Veszprémi): The DAQ and control system for the CMS Phase-1 pixel detector upgrade, JINST 14 (2019) no.10, P10017, 2019
Gábor I. Veres: Heavy ion physics at CMS and ATLAS: hard probes, arXiv:1905.10461 [hep-ex], CMS CR-2019/072, Proc. of 54th Rencontres de Moriond on QCD and High Energy Interactions (Moriond QCD 2019), 2019
Ruchi Chudasama: Evidence for light-by-light scattering and searches for axion-like particles in ultraperipheral PbPb collisions at sqrt(s_NN) = 5.02 TeV, PoS DIS2019 (2019) 084, Proc. of XXVII International Workshop on Deep Inelastic Scattering and Related Subjects, DIS2019, 2019
Ankita Mehta: Recent CMS results on the Soft QCD and Forward Physics, CMS CR-2019-088, PoS DIS2019 (2019) 261, Proc. of XXVII International Workshop on Deep Inelastic Scattering and Related Subjects, DIS2019, 2019, 2019
Oliver Suranyi: Exclusive Particle Production in pp and pPb Collisions at CMS, Universe 4 (2018) no.2, 25, CMS-CR-2017-382, Proc. of BGL2017: 10th Bolyai-Gauss-Lobachevsky Conference on Non-Euclidean Geometry and Its Applications, 2018
Péter Major: Search for supersymmetry in final states with photons and missing transverse momentum in pp collisions at 13 TeV using the CMS detector, CMS CR-2019-089, PoS DIS2019 (2019) 098, Proc. of XXVII International Workshop on Deep Inelastic Scattering and Related Subjects, DIS2019, 2019
Koushik Mandal: Search for scalar top and gluino in fully hadronic final state at CMS, CMS CR-2019-185, to appear in Proc. of Blois 2019: 31st Rencontres de Blois on "Particle Physics and Cosmology", 2019
Péter Major: Precision luminosity measurement of proton-proton collisions at the CMS experiment in Run 2, CMS CR-2019-226, to appear in Proc. of EPS-HEP2019: European Physical Society Conference on High Energy Physics, 2019
Péter Major: Studies of the factorization of proton densities in van der Meer scans and its impact on precision luminosity measurements for CMS, CMS CR-2019-227, to appear in Proc. of EPS-HEP2019: European Physical Society Conference on High Energy Physics, 2019
Oliver Surányi: Recent CMS and CMS-TOTEM results on diffraction and exclusive production, CMS CR-2019-124, to appear in Proc. of EDS 2019: 18th Conference on Elastic and Diffractive Scattering, 2019
Oliver Surányi: Study of forward neutrons with the CMS Zero Degree Calorimeter, CMS CR-2019-039, to appear in Proc. of Zimanyi 2018 18th Zimanyi School Winter Workshop on Heavy Ion Physics, 2019
Gábor Veres: Probing heavy quark dynamics in PbPb collisions with CMS, CMS CR-2019-239, to appear in Proc. of EPS-HEP2019 European Physical Society Conference on High Energy Physics, 2019
Gabriella Pásztor: Precision tests of the Standard Model at LHC with the ATLAS and CMS detectors, CMS CR-2019-245, to appear in Proc. of FFK-2019 International Conference on Precision Physics and Fundamental Physical Constants, 2019
CMS Collaboration: CMS luminosity measurement for the 2018 data-taking period at s√= 13 TeV, CMS-PAS-LUM-18-002, 2019
CMS Collaboration: Measurement of electroweak production of Z gamma in association with two jets in proton-proton collisions at sqrt(s) = 13 TeV, CMS-PAS-SMP-18-007, 2019
CMS Collaboration: Inclusive search for supersymmetry in pp collisions at √s=13 TeV using razor variables and boosted object identification in zero and one lepton final states, CMS-SUS-16-017, arXiv:1812.06302, JHEP 03 (2019) 031, 2019
CMS Collaboration: Bose-Einstein correlations of charged hadrons in proton-proton collisions at √s= 13 TeV, CMS-FSQ-15-009, arXiv:1910.08815 [hep-ex], submitted to JHEP, 2019
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CMS Collaboration: Measurement of the average very forward energy as a function of the track multiplicity at central pseudorapidities in proton-proton collisions at √s= 13 TeV, CMS-FSQ-18-001, arXiv:1908.01750 [hep-ex], submitted to EPJC, 2019
CMS Collaboration: Search for supersymmetry with a compressed mass spectrum in the vector boson fusion topology with 1-lepton and 0-lepton final states in proton-proton collisions at 13TeV, CMS-SUS-17-007, arXiv:1905.13059 [hep-ex], JHEP 1908 (2019) 150, 2019
CMS Collaboration: Search for supersymmetry in final states with photons and missing transverse momentum in proton-proton collisions at 13 TeV, CMS-SUS-17-011, arXiv:1903.07070 [hep-ex], JHEP 1906 (2019) 143, 2019
CMS Collaboration: Search for supersymmetry in events with a photon, jets, b -jets, and missing transverse momentum in proton–proton collisions at 13 TeV, Eur. Phys. J. C79 (2019) no.5, 444, 2019
CMS Collaboration: Search for supersymmetry in events with a photon, a lepton, and missing transverse momentum in proton-proton collisions at √s= 13 TeV, CMS-SUS-17-012, arXiv:1812.04066 [hep-ex], JHEP 1901 (2019) 154, 2019
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János Karancsi (advisors: Zoltán Trócsányi, Viktor Veszprémi): Search for particles beyond the Standard Model with the CMS detector, CERN-THESIS-2019-080, PhD Thesis, Univeristy of Debrecen, 2019
Tamás Vámi (supervisor: Viktor Veszprémi): Sensitivity study of a search for a simplified supersymmetric model using pp collisions at √ s = 13 TeV with the CMS detector, MSc Thesis, Eötvös University, 2019
Krisztán Farkas (advisor: Gabriella Pásztor): Luminozitás kalibráció a CERN LHC CMS detektorával, MSc thesis, Eötvös University, 2019
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Krisztián Farkas (advisor: Gabriella Pásztor): Measurement of the pp --> Zγ cross-section at the LHC -- MC generator studies, BSc thesis, Eötvös University, 2018
Krisztián Tamás (advisor: Gabriella Pásztor): Search for supersymmetric particle production in H+photon+MET channel with MVA techniques, BSc thesis, Eötvös University, 2018
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CMS Collaboration: Precision measurement of the structure of the CMS inner tracking system using nuclear interactions, CMS-TRK-17-001, arXiv:1807.03289 [physics.ins-det], JINST 13 (2018) no.10, P10034, 2018
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Tamás Álmos Vámi: Searches for gluinos and squarks, CMS-CR-2019-126, arXiv:1909.11753 [hep-ex] , Proc. of LHCP2019 7th Conference of Large Hadron Collider Physics, 2019
Tamás Álmos Vámi: Searches for strong production of supersymmetry in CMS, CMS-CR-2019-018, arXiv:1904.12148 [hep-ex], PoS CORFU2018 (2019) 074, Proc. of Corfu2018: 18th Hellenic School and Workshops on Elementary Particle Physics and Gravity, 2019
Tamás Álmos Vámi: Calibration and performance of the CMS pixel detector in LHC Run 2, CMS-CR-2019-127, arXiv:1909.12920 [physics.ins-det], Proc. of LHCP2019 7th Conference of Large Hadron Collider Physics, 2019
Juliette Alimen et al. (incl. Tamás Álmos Vámi): Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider, FERMILAB-PUB-19-110-CD-PPD, arXiv:1903.04497 [hep-ex], 2019
Dezső Horváth: Tests of the CPT Invariance at the Antiproton Decelerator of CERN, Ukr. J. Phys. 64 (2019) no.7, 589, Proc. of New Trends in High-Energy Physics, 2019, Odessa, 2019
Dezső Horváth: Higgs and BSM Studies at the LHC, Universe 5 (2019) no.7, 160, CMS CR-2019/024, Proc. of Zimanyi 2018 18th Zimanyi School Winter Workshop on Heavy Ion Physics, 2019
CMS Collaboration: Observation of the Λ_b→J/ψΛϕ decay in proton-proton collisions at √s = 13 TeV, CMS-PAS-BPH-19-002, 2019
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CMS Collaboration: Performance of missing transverse momentum reconstruction in proton-proton collisions at √s = 13 TeV using the CMS detector, CMS-JME-17-001, arXiv:1903.06078 [hep-ex], JINST 14 (2019) no.07, P07004, 2019
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CMS Collaboration: Search for anomalous triple gauge couplings in WW and WZ production in lepton + jet events in proton-proton collisions at √s = 13 TeV, CMS-SMP-18-008, arXiv:1907.08354 [hep-ex], submited to JHEP, 2019
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CMS Collaboration: Measurement of inclusive very forward jet cross sections in proton-lead collisions at √, JHEP 1905 (2019) 043, 2019
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Tamás Álmos Vámi, Viktor Veszprémi: Study of the CMS Phase-1 Pixel Pilot Blade Reconstruction, arXiv:1804.00483, CMS-CR-2017-389, Proc of TIPP 2017, Beijing, China, 21 - 26 May 2017, Springer Proc. Phys. 213 (2018) 366-369, 2018
CMS Collaboration: Measurement of inclusive and differential Higgs boson production cross sections in the diphoton decay channel in proton-proton collisions at √s= 13 TeV, CMS-HIG-17-025, CERN-EP-2018-166, arXiv:1807.03825 [hep-ex], JHEP01 (2019) 183, 2019
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CMS Collaboration: Search for the decay of a Higgs boson in the ℓℓγ channel in proton-proton collisions at √s= 13 TeV, CMS-HIG-17-007, CERN-EP-2018-092, arXiv:1806.05996 [hep-ex], JHEP 11 (2018) 152, 2018
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Péter Major: Precision luminosity measurement of proton-proton collisions at the CMS experiment in Run 2, CMS CR-2019-226, PoS(EPS-HEP2019)198, Proceedings of the European Physical Society Conference on High Energy Physics - EPS-HEP2019, 10-17 July 2019, Ghent, Belgium, 2019
Oliver Surányi: Recent CMS and CMS-TOTEM results on diffraction and exclusive production, CMS CR-2019-124, arXiv: 2002.06959 [hep-ex], to appear in Proc. of EDS 2019: 18th Conference on Elastic and Diffractive Scattering, 2019
Oliver Surányi: Study of forward neutrons with the CMS Zero Degree Calorimeter, CMS CR-2019-039, Universe 5 (2019) 10, 210, Proc. of Zimanyi 2018 18th Zimanyi School Winter Workshop on Heavy Ion Physics, 2019
Gábor Veres: Probing heavy quark dynamics in PbPb collisions with CMS, CMS CR-2019-239, PoS(EPS-HEP2019)284, Proc. of EPS-HEP2019 European Physical Society Conference on High Energy Physics, 2019
Gabriella Pásztor: Precision tests of the Standard Model at LHC with the ATLAS and CMS detectors, CMS CR-2019-245, PoS(FFK2019)005, Proc. of FFK-2019 International Conference on Precision Physics and Fundamental Physical Constants, 2019
CMS Collaboration: Measurement of electroweak production of Z gamma in association with two jets in proton-proton collisions at sqrt(s) = 13 TeV, CMS-PAS-SMP-18-007 (superseeded by CERN-EP-2020-007, CMS-SMP-18-007-003, arXiv:2002.09902, JHEP 2006 (2020) 076), 2019
CMS Collaboration: Bose-Einstein correlations of charged hadrons in proton-proton collisions at √s= 13 TeV, CMS-FSQ-15-009, CERN-EP-2019-151, arXiv:1910.08815 [hep-ex], JHEP 03 (2020) 014, 2020
CMS Collaboration: Mixed higher-order anisotropic flow and nonlinear response coefficients of charged particles in PbPb collisions at $\sqrt{s_\mathrm{NN}} =$ 2.76 and 5.02 TeV, CMS-HIN-17-005, CERN-EP-2019-211, arXiv:1910.08789 [hep-ex], Eur. Phys. J. C 80 (2020) 534, 2020
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CMS Collaboration: Search for a charged Higgs boson decaying into top and bottom quarks in proton-proton collisions at, CMS-HIG-18-004, CERN-EP-2019-164, arXiv:1908.09206 [hep-ex], JHEP 01 (2020) 096, 2020
CMS Collaboration: Measurement of the average very forward energy as a function of the track multiplicity at central pseudorapidities in proton-proton collisions at √s= 13 TeV, CMS-FSQ-18-001, CERN-EP-2019-146, arXiv:1908.01750 [hep-ex], Eur. Phys. J. C 79 (2019) 893, 2019
CMS Collaboration: Observation of the Λ_b→J/ψΛϕ decay in proton-proton collisions at √s = 13 TeV, CMS-PAS-BPH-19-002 (superseeded by arXiv:2007.01984, CMS-HIG-19-002, CERN-EP-2020-106, submitted to JHEP), 2019
CMS Collaboration: Measurements of differential Z boson production cross sections in proton-proton collisions at √s = 13 TeV, CMS-SMP-17-010, CERN-EP-2019-175, arXiv:1909.04133 [hep-ex], JHEP 12 (2019) 061, 2019
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CMS Collaboration: Measurement of the cross section for electroweak production of a Z boson, a photon and two jets in proton-proton collisions at √s = 13 TeV and constraints on anom QCs, CMS-SMP-18-007, CERN-EP-2020-007, arXiv:2002.09902 [hep-ex], JHEP 06 (2020) 076, 2020
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CMS Collaboration: W+W− boson pair production in proton-proton collisions at √s= 13 TeV, CMS-SMP-18-004, CERN-EP-2020-144, arXiv:2009.00119 [hep-ex], Phys. Rev. D 102, 092001 (2020), 2020
CMS Collaboration: Measurements of the W boson rapidity, helicity, double-differential cross sections, and charge asymmetry in pp collisions at √s= 13 TeV, CMS-SMP-18-012, CERN-EP-2020-11, arXiv:2008.04174 [hep-ex], Submitted to Phys. Rev. D., 2020
CMS Collaboration: Measurements of pp → ZZ production cross sections and constraints on anomalous triple gauge couplings at √s= 13 TeV, CMS-SMP-19-001, CERN-EP-2020-145, arXiv:2009.01186 [hep-ex], submitted to EPJC, 2020
CMS Collaboration: Measurement of the associated production of a Z boson with charm or bottom quark jets in proton-proton collisions at √s = 13 TeV, CMS-SMP-19-004, CERN-EP-2019-262, arXiv:2001.06899 [hep-ex], Phys. Rev. D 102, 032007 (2020), 2020
Szabolcs Polónyi (supervisor: Gabriella Pásztor): Szuperszimmetrikus részecskék keresése és a Higgs-bozon tömegrekonstrukciója az LHC CMS kísérletével, BSc Thesis, Eötvös University, 2020
Rebeka Lilla Tamási-Böttger (supervisor: Gabriella Pásztor, internal consultant: Gábor Takács): Challenging the Standard Model and search for New Physics at the LHC CMS experiment, MSc Thesis, Budapest University of Technology and Economics, 2020
Mátyás Horváth (supervisor: Gabriella Pásztor , Olivér Surányi): Neutronkibocsátás vizsgálata és axionkeresés fény-fény szórásban a CERN LHC ultraperiferikus ólomion-ütközéseiben, TDK dolgozat, Eötvös University, 2019
Csenge Komjáti (supervisor: Gabriella Pásztor, Ankita Mehta): A proton szerkezetének vizsgálata dupla partonszórás mérésével a CERN LHC CMS kísérletében, TDK dolgozat, Eötvös University, 2020
Nóra Rab (supervisor: Gabriella Pásztor, Koushik Mandal): Skalár-t-kvarkok keresése az LHC CMS detektorral, TDK dolgozat, Eötvös University, 2020
CMS Collaboration: Measurements of production cross sections of WZ and same-sign WW boson pairs in association with two jets in proton-proton collisions at √s= 13 TeV, CMS-SMP-19-012, CERN-EP-2020-064, arXiv:2005.01173 [hep-ex], Phys. Lett. B 809 (2020) 135710, 2020
CMS Collaboration: Observation of the production of three massive gauge bosons at √s = 13 TeV, CMS-SMP-19-014, CERN-EP-2020-076, arXiv:2006.11191 [hep-ex], Phys. Rev. Lett. 125, 151802 (2020), 2020
CMS Collaboration: Measurements of production cross sections of polarized same-sign W boson pairs in association with two jets in proton-proton collisions at √s = 13 TeV, MS-SMP-20-006, CERN-EP-2020-168, arXiv:2009.09429v1 [hep-ex], submitted to Phys. Lett. B, 2020
Krisztián Farkas: Search for Supersymmetry with photons, CMS-CR-2020-133, PoS (LHCP2020) 219, appear in Proc of The Eighth Annual Conference on Large Hadron Collider Physics - LHPC2020, 25-30 May, 2020, Paris, France (online), 2020
Rebeka Lilla Tamási-Böttger: Observation of light-by-light scattering and search for axion-like particles with the CMS experiment, CMS-CR-2020-239, PoS(ICHEP2020)296, Proceedings of the 40th International Conference on High Energy Physics – ICHEP2020, 28 July - 6 August 2020, Prague (online), 2020
CMS Collaboration: Search for top squark pair production using dilepton final states in pp collision data collected at √s= 13 TeV, CMS-SUS-19-011, CERN-EP-2020-131, arXiv:2008.05936v1 [hep-ex], submitted to EPJC, 2020
CMS Collaboration: Identification of heavy, energetic, hadronically decaying particles using machine-learning techniques, CMS-JME-18-002, CERN-EP-2020-03, arXiv:2004.08262v2 [hep-ex], JINST 15 (2020) P06005, 2020
The CMS Collaboration [incl. D. Stickland as editor, G. Pásztor and D. Stickland as chapter editors; M. Bartók, R. Chudasama, K. Farkas, P. Major, K. Mandal, A. Mehta, G. Pásztor, O. Surányi, G.I. Veres as authors]: The Phase-2 Upgrade of the CMS Beam Radiation, Instrumentation, and Luminosity Detectors: Conceptual Design, CERN-CMS-NOTE-2019-008, 2020
Péter Major: Studies of the factorisation of proton densities in van der Meer scans and its impact on precision luminosity measurements for CMS, CMS-CR-2019-227, PoS (EPS-HEP2019) 199, Proceedings of the European Physical Society Conference on High Energy Physics - EPS-HEP2019, 10-17 July 2019, Ghent, Belgium, 2019





 

Events of the project

 
2020-02-20 17:43:44
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