Serch for supersymmetric particles in high energy proton-proton collisions

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Details of project

Identifier

37350

Type

Principal investigator

Tóth, József

Title in Hungarian

Szuperszimmetrikus részecskék keresése nagyenergiájú proton-proton ütközésekben

Title in English

Serch for supersymmetric particles in high energy proton-proton collisions

Panel

Physics 1

Department or equivalent

High Energy Physics Department (Wigner Research Centre for Physics)

Participants

Boldizsár, László
Debreczeni, Gergely
Manno, István
Urbán, László

Starting date

2002-01-01

Closing date

2006-12-31

Funding (in million HUF)

9.976

FTE (full time equivalent)

0.00

state

closed project

Final report

Results in Hungarian

A Genf székhelyű, összeurópai finanszírozású Európai Részecskefizikai Központban (CERN) épülő új gyorsító, az LHC előreláthatólag 2008-ban - a világon elsőként -14 TeV energiájú proton-proton ütközéseket szolgáltat. Ezzel lehetővé válik, hogy az elemi részecskék közötti kölcsönhatásokat és az azokban megnyilvánuló szimmetria tulajdonságokat minden eddiginél magasabb energiatartományban kísérletileg is tanulmányozhassuk. Ennek érdekében a Marseillei Részecskefizikai Központ (CPPM) kutatóival együtt részt vettünk a mintegy 150 laboratórium 1600 fizikusát egyesítő ATLAS kollaboráció épülő detektora elektromágneses kalorimétere záróegységeinek megépítésében: az ezt alkotó modulok összeszerelésében, elektronikus tesztjeiben, különböző részecskenyalábokkal történő besugárzásában és az így nyert adatok kiértékelésében. Létrehoztuk a záróegységek működését leíró számítógépes programrendszer számos elemét. Modelleztük a detektorban lejátszódó elektromágneses folyamatokat, új algoritmust definiáltunk a sokszoros Coulomb szórás leírására. Vizsgáltuk a záróegységek fizikai tulajdonságait, így pl. energia- és térfelbontó képességüket. Megállapítottuk, hogy ezek összhangban vannak a tervezett paraméterekkel, ami lehetővé teszi, hogy a záróegységeket mind a precíziós mérésekben, mind pedig a proton-proton ütközésekben keletkező események energiaegyensúlyának kiértékelésében eredményesen használhassuk

Results in English

The Large Hadron Collider (LHC) is under construction at the Organization Européenne pour la Recherche Nucléaire (CERN), Genf, Switzerland. It is going to provide world highest energy proton-proton collisions of 14 TeV in 2008. This makes a unique possibility to study experimentally the interactions and symmetry features of the elementary particles in a not yet studied energy region. Together with the physics group of the Centre de Physique des Particules de Marseille (CPPM), we participated in several aspects of the construction of the endcaps of the electromagnetic calorimeter (EMEC) of the Atlas collaboration, an organization including about 1500 physicists of 150 laboratories around the world. We contributed to the assembly, electrical tests, data recording and analysis taken at the CERN's test beam irradiation of the EMEC modules. We worked out several items of the EMEC simulation software. Computer models of the electromagnetic interactions taking place in the material of the detector were studied and improved. A new algorithm to describe the multiple Coulomb scattering was created and implemented into the Geant4 simulation software. Physics performance (energy and space resolution, particle identification capability etc.) of EMEC modules was proven to be compatible with the design specifications. This makes possible to use these detectors, as part of the Atlas detector complex, in high precision measurements and measuring energy balance of the future p-p collisons at LHC.

Full text

http://real.mtak.hu/175/

Decision

Yes

List of publications

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Search for Single Top Production at LEP, Phys Lett B 549:290-300, 2002

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Search for Colour Reconnection Effects in e+e- -> W+W- -> hadrons through Particle-Flow Studies at LEP, Phys Lett B 561:202-121, 2003

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Measurement of Exclusive rho zero rho zero Production in Two-Photon Collisions at High Q2 at LEP, Phys Lett B 568:11-22, 2003

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Measurement of Branching Fractions of Tau Hadronic Decays, CERN-EP/2003-019, submitted. to Eur.Phys.J.C., 2003

ALEPH; DELPHI; L3; OPAL;incl. Boldizsár L;Debreczeni J;Tóth J; et al.: Search for the Standard Model Higgs Boson at LEP, Phys Lett B 565:61-75, 2003

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Inclusive Jet Production in Two-Photon Collisions at LEP, Phys Lett B 602:157-166, 2004

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Search for Charged Higgs Bosons at LEP, Phys Lett B 575:208-220, 2003

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Search for Excited Leptons at LEP, Phys Lett B 568:23-34, 2003

Ivantchenko VN; Urbán L; et al.: Overview and New Developments in GEANT4 Electromagnetic Physics, Proceedings of the 2004 IEEE Nuclear Science Symposium and Medical Imaging Conference, Rome, Italy, 16-22 Oct. 2004, 2005

Agostinelli S;Urbán L; et al.: GEANT4, a Simulation Toolkit, Nucl Inst Meth A 506:250-303, 2003

Urbán L;: Latest Developments in MSC., Presentation on GLAST Collaboration Meeting, SLAC, USA, 10.09.2003, 2003

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Search for Doubly-Charged Higgs Bosons at LEP, Phys Lett B 576:18-28, 2003

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Measurement of the Z-boson mass using Z gamma events at centre-of-mass energies above the Z pole, Phys Lett B 585:42-52, 2004

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Single- and Multi-Photon events with Missing Energy in e+e- Collisions at LEP, Phys Lett B 587:16-32, 2004

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Flavour Independent Search for Neutral Higgs Bosons at LEP, Phys Lett B 583:14-27, 2004

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Production of Single W Bosons at LEP and Measurement of WW gamma Gauge Coupling Parameters., Phys Lett B 547:151-163, 2002

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: The e+ e- -> Z gamma gamma -> q qbar gamma gamma Reaction at LEP and Constraints on Anomalous Quartic Gauge Boson Couplings., Phys Lett B 540:43-51, 2002

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Measurement of Genuine Three-Particle Bose-Einstein Correlations in Hadronic Z Decay., Phys Lett B 540:185-198, 2002

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Measurement of Bose-Einstein Correlations in e+e- -> W+W- Events at LEP, Phys Lett B 547:139-150, 2002

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al: Search for Neutral Higgs bosons of the Minimal Supersymmetric Standard Model in e+e- Interactions at Sqrt(s) up to 209 GeV, Phys Lett B 545:30-42, 2002

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Study of Spin and Decay-Plane Correlations of W Bosons in the e+e- ->W+W- Process at LEP, Eur Phys J C40:333-342, 2004

ALEPH; DELPHI; L3; OPAL;incl. Boldizsár L;Debreczeni J;Tóth J; et al.: A Combination of Preliminary Electroweak Measurements and Constraints on the Standard Model, CERN-EP/2002-091, 2002

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Search for a Higgs Boson Decaying to Weak Boson Pairs at LEP, Phys Lett B 568:191-204, 2003

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Study of the e+e- -> Ze+e- Process at LEP, Phys Lett B 561:73-81, 2003

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Inclusive Charged Hadron Production in Two-Photon Collisions at LEP, Phys Lett B 554:105-114, 2003

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Measurement of W Polarisation at LEP, Phys Lett B 557:147-156, 2003

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Proton-Antiproton Pair Production in Two-Photon Collisions at LEP, Phys Lett B 571:11-20, 2003

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Search for Colour Singlet and Colour Reconnection Effects in Hadronic Z Decays at LEP, Phys Lett B 581:19-30, 2004

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Z Boson Pair-Production at LEP, Phys Lett B 572:133-144, 2003

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Search for Scalar Leptons and Scalar Quarks at LEP, Phys Lett B 580:37-49, 2004

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Muon-Pair and Tau-Pair Production in Two-Photon Collisions at LEP, Phys Lett B 585:53-62, 2004

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Inclusive Lambda Production in Two-Photon Collisions at LEP, Phys Lett B 586:140-150, 2004

Urbán L;: Developments in Multiple Scattering, Presentation on GEANT4 Collaboration Workshop, CERN, 1.Oct.2002, 2002

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Measurement of Triple-Gauge-Boson Couplings of the W Boson at LEP, Phys Lett B 586:151-166, 2004

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Search for Anomalous Couplings in the Higgs Sector at LEP, Phys Lett B 589:89-102, 2004

ALEPH; DELPHI; L3; OPAL;incl. Boldizsár L;Debreczeni J;Tóth J; et al.: A Combination of Preliminary Electroweak Measurements and Constraints on the Standard Model, CERN-EP/2003-091, 2003

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Study of the e^+e^- -> Z gamma Process at LEP and Limits on Triple Neutral-Gauge-Boson Couplings, Phys Lett B 597:119-130, 2004

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Measurement of Exclusive rho+rho- Production in High-Q^2 Two-Photon Collisions at LEP, Phys Lett B 597:26-38, 2004

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Search for Branons at LEP, Phys Lett B 597:145-154, 2004

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Studies of Hadronic Event Structure in e+e- Annihilation from 30 GeV to 209 GeV with the L3 Detector, Phys Rep 399:71-174, 2004

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Measurement of the Cross Section of W-boson pair production at LEP, Phys Lett B 600:22-40, 2004

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Measurement of Exclusive rho^0 rho^0 Production in Mid-Virtuality Two-Photon Interactions at LEP, Phys Lett B 604:48-60, 2004

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Search for an Invisibly-Decaying Higgs Boson at LEP, Phys Lett B 609:35-48, 2005

ALEPH; DELPHI; L3; OPAL;incl. Boldizsár L;Debreczeni J;Tóth J; et al.: A Combination of Preliminary Electroweak Measurements and Constraints on the Standard Model, CERN-EP/2004-069, 2004

Gergely Debreczeni: Muon Pair Production in two photon collisions., Presentation on the L3 Collaboration Meeting, 23.06.2003,CERN, 2003

Debreczeni G; Tóth J;: Simulation of charge collection in EMEC, Presented on the ATLAS Software Workshop,CERN, 09.09.2003, 2003

Aubert B; ... ;Tóth J; et al.: Performance of the Atlas Electromagnetic Calorimeter Barrel Module 0, Nucl Inst Meth A 500:202-231, 2003

Aubert B; ... ;Tóth J; et al.: Performance of the Atlas Electromagnetic Calorimeter End-Cap Module 0, Nucl Inst Meth A 500:178-201, 2003

Aubert B; ... ;Tóth J; et al.: Erratum to \''Performance of the ATLAS electromagnetic calorimeter barrel module 0\'' [Nucl. Instr. and Meth. A 500 (2003) 202–231], Nucl Inst Meth A 517:399-402, 2004

Cojocaru C; Tóth J; et al.: Hadronic calibration of the ATLAS liquid argon end-cap calorimeter in the pseudorapidity region 1.6<|ç|<1.8 in beam tests, Nucl Inst Meth A 531:481-514, 2004

Tóth J;: On some aspects of EMEC simulation, Presentation on LAr working group meeting at CPPM, Marseille, France,06.10.2003, 2003

Tóth J;: Status of charge collection code for EMEC, presentation on ATLAS Liquid Argon Software Working Group’s meeting at CERN on 23.03.2004., 2004

Monnier E;Soukharev A;Tóth J;: EMEC simulation, presentation on ATLAS Liquid Argon Software Working Group’s meeting at CERN on 08.09.2004, 2004

Serfon C;Soukharev A;Tóth J;: Status of GEANT4 Simulation of ATLAS EMEC Calorimeter, presentation on ATLAS Liquid Argon Software & Performance Working Group’s meeting at CERN on 17.11.2004., 2004

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Measurement of the Atmospheric Muon Spectrum from 20 to 3000 GeV, Phys Lett B 598:15-32, 2004

Urbán L;: Multiple Scattering Model in GEANT4, CERN-OPEN-2002-070, 2002

Grichine VM; Urbán L; et al.: Upgrade of the GEANT4 ''Standard'' Electromagnetic Package, Proceedings of the 2004 IEEE Nuclear Science Symposium and Medical Imaging Conference, Rome, Italy, 16-22 Oct. 2004, 2005

Urbán L;: Multiple Scattering, Presentation on GEANT4 User Workshop, CERN, 13.Nov.2002, 2002

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Measurement of the photon structure function F2gamma with the L3 detector at LEP, Physics Letters B 622:249-264, 2005

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Z-boson production with two unobserved, back-to-back, hard photons at LEP, Physics Letters B 613:118-127, 2005

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Compton Scattering of Quasi-Real Virtual Photons at LEP, Physics Letters B 616:145-158, 2005

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Measurement of the Cross Section for Open-Beauty Production in Photon-Photon Collisions, Physics Letters B 619:71-81, 2005

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Measurement of Exclusive rho+rho- Production in Mid-Virtuality Two-Photon Interactions and Study of the gamma gamma* to rho rho Process at LEP, Physics Letters B 615:19-30, 2005

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Neutral-Current Four-Fermion Production in e+e- Interactions at LEP, Physics Letters B 616 (2005) 159-173, 2005

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Measurement of the Running of the Electromagnetic Coupling at Large Momentum-Transfer at LEP, Physics Letters B 623:26-36, 2005

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Measurement of Hadron and Lepton-Pair Production in e+e- Collisions at root(s)=192-208GeV, Eur Phys J C47:1-19, 2006

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Measurement of the Mass and Width of the W boson at LEP, European Physical Journal C45:569-587, 2006

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Analysis of the pi^+pi^-pi^+pi^- and pi^+pi^0pi^-pi^0 Final States in Quasi-Real Two-Photon Collisions at LEP, Physics Letters B638:128-139, 2006

ALEPH; DELPHI; L3; OPAL;incl. Boldizsár L;Debreczeni J;Tóth J; et al.: Precision Electroweak Measurements on the Z Resonance, Physics Reports 427:257-454, 2006

ALEPH; DELPHI; L3; OPAL;incl. Boldizsár L;Debreczeni J;Tóth J; et al.: A Combination of Preliminary Electroweak Measurements and Constraints on the Standard Model, CERN-PH-EP/2005-051, November 9, 2005, 2005

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Measurement of the Shadowing of High-Energy Cosmic Rays by the Moon: A Search for TeV-Energy Antiprotons, Astroparticle Physics 23:411-434, 2005

Urbán L; et al.: Latest Developments in the Standard Electromagnetic Physics, presentation on GEANT4 Workshop, Catania,Italy, 07.10.2004, 2004

Urbán L;: Multiple Scattering in GEANT4, Presentation on GEANT CollaborationWorkshop,TRIUMF, Vancouver, Canada, 04.09.2003, 2003

Urbán L: A Model for Multiple Scattering in GEANT4, Presentation on Geant4 Collaboration Workshop, Bordeaux (France) ,7-10 November,2005, 2005

Urbán L: A Model for Multiple Scattering in GEANT4, Presentation on Monte Carlo 2005 Topical Meeting, Chattanooga(Tenessee,USA),17-21 April, 2005., 2005

ALEPH; DELPHI; L3; OPAL;incl. Boldizsár L;Debreczeni J;Tóth J; et al.: Search for Neutral MSSM Higgs Bosons at LEP, Eur. Phys. J .C47:547, 2006

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Study of Resonance Formation in the Mass Region 1400-1500MeV through the Reaction gamma gamma to KsKpi, CERN-PH-EP/2006-041, to appear in JHEP, 2006

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: Study of Inclusive Strange-Baryon Production and Search for Pentaquarks in Two-Photon Collisions at LEP, CERN-PH-EP/2006-028, To appear in the European Physical Journal C, 2006

ALEPH; DELPHI; L3; OPAL;incl. Boldizsár L;Debreczeni J;Tóth J; et al.: A Combination of Preliminary Electroweak Measurements and Constraints on the Standard Model, CERN-PH-EP/2006-042, 2006

Achard P;Boldizsár L;Debreczeni J;Tóth J; et al.: A Search for Flaring Very-High-Energy Cosmic gamma-ray Sources with the L3+C Muon Spectrometer, Astroparticle Physics 25:298-310, 2006

BOGDANOV AM, URBAN L et al: Geant4 simulation of production and interaction of muons, IEEE T NUCL SCI 53:513-519, 2006

ALLISON J, URBAN L et al.: Geant4 developments and applications, IEEE T NUCL SCI 53:270, 2006

AMAKO K, URBAN L et al.: Geant4 and its validation, NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 150:44-49, 2006

Colas J; Tisserant S; Tóth J et al.: Position resolution and particle identification with the ATLAS EM calorimeter, Nucl Inst Meth A 550:96-115, 2005

E.Monnier, B.Dekhissi, V.Niess, J.Toth, C.Serfon, A.Soukharev et al.,: Status of EMEC simulation, presentation on the LAr Calorimeter Performance meeting at CERN on 17.11.2005, 2005

E.Monnier, V.Niess, J.Toth: Endcap status, presentation on the LAr Calorimeter Simulation group meeting at CERN on13.02.2006, 2006

B.Dekhissi, E.Monnier, V.Niess, A.Soukharev, J. Toth: H6 EMEC standalone TB: Simulation and analysis update, presentation on the LAr Calorimeter Simulation group meeting at CERN, on 21. June,2006, 2006

J. Boudreau, E.Monnier, J.Toth et al.: LAr Simulations, Status & Plans, at the Atlas Software Workshop at CERN, September 6,2006, 2006

ATLAS Electromagnetic LAr Calorimeter group, including J.Toth: Construction, assembly and test of the ATLAS electromagnetic end-cap Calorimeter, article in preparation, to be submitted to NIM, 2007

M.Aharrouche....S.Tisserant....J.Toth et al.: Response uniformity of the ATLAS Liquid Argon Calorimeter, article in preparation, to be submitted to NIM, 2007

J. Boudreau, E.Monnier, J.Toth et al.: Specification for a detailed description of the liquid Argon calorimeter of Atlas, article in preparation, 2007

B.Dekhissi, E.Monnier, V.Niess, C.Serfon, A.Soukharev, J. Toth: Test Beam Monte Carlo comparisons, presentation on the Hadron Calibration Workshop, Munich 3-5 May, 2006, 2006

Urban L. et al.: Geant4 Physics Reference Manual, http://geant4.web.cern.ch/geant4/UserDocumentation/UsersGuides/PhysicsReferenceManual/html, 2006

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