Particle physics applications at lattice field theory  Page description

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Details of project

  
Identifier
49652
Type NK
Principal investigator Csikor, Ferenc
Title in Hungarian A rácselmélet részecskefizikai alkalmazásai
Title in English Particle physics applications at lattice field theory
Panel Physics 1
Department or equivalent Department of Theoretical Physics (Eötvös Loránd University)
Participants Fodor, Zoltán
Katz, Sándor
Kovács, Tamás György
Szabó, Kálmán
Tóth, Bálint
Starting date 2005-01-01
Closing date 2009-12-31
Funding (in million HUF) 19.500
FTE (full time equivalent) 12.75
state closed project





 

Final report

  
Results in Hungarian
Rácstérelméleti módszerekkel vizsgáltuk a kvantumszíndinamikát véges és zérus hőmérsékleten és kémiai potenciálon. Terjedelmi okokból a legfontosabb eredményeket tekintjük csak át az összefoglalóban. Nulla kémiai potenciál mellett meghatároztuk a hadronikus anyag és a kvark-gluon plazma közti átmenet rendjét, valamint az átmeneti hõmérsékletet a kontinuum limeszben. Ezen eredmények a rácstérelmélet végleges eredményeinek tekinthetők. Összehasonlítottuk a Wilson és staggered fermionokat 3 íz használatával. Nem-nulla kémiai potenciálnál meghatároztuk a kvark-antikvark potenciált valamint a fázisdiagramot nagy kémiai potenciálokra az állapotsűrűség módszer segítségével. A pion szektort megvizsgáltuk kanonikus sokaság segítségével. Meghatároztuk a mu-T fázisdiagramot kis kémiai potenciálokra 4 különböző rácsállandónál. Rácsszámolásokkal megvizsgáltuk a pentakvarkok létezését és nem találtunk erre utaló jelet. Kiszámoltuk a hadron spektrumot Wilson fermionokkal a kontinuum limeszben. Meghatároztuk a pion és kaon leptonikus bomlási állandóinak arányát. Implementáltuk a QCD kódjainkat grafikus kártyákra. Overlap fermionokat használó korábbi dinamikus algoritmusunkat továbbfejlesztettük.
Results in English
We have studied quantum chromodynamics at finite and zero temperature and chemical potential using lattice field theory methods. Due to space limitations we present here only the most important results. We have determined at zero chemical potential the order of the transition from hadronic matter to the quark-gluon plasma as well as the transition temperature, both in the continuum limit. These results should be considered as final results of lattice field theory. We have compared Wilson and staggered fermions for 3 flavours. We have determined the quark-antiquark potential as well as the phase diagram for large non-zero chemical potentials using the density of states method. We have considered the pion sector using canonical ensembles. We have determined the mu-T phase diagram for small chemical potentials at 4 different lattice spacings. Using lattice simulations we have considered the problem of existence of pentaquarks and found no evidence for them. We have calculated the hadronic spectrum in the continuum limit using Wilson fermions. We have determined the ratio of the pion and kaon leptonic decay constants. We have implemented our QCD computer codes for the graphical processor cards (GPU). Our dynamical algorithms using overlap fermions have also been extended.
Full text https://www.otka-palyazat.hu/download.php?type=zarobeszamolo&projektid=49652
Decision
Yes





 

List of publications

  
Z Fodor, C Holbling, M Mechtel, K. K. Szabo: NONPERTURBATIVE INVESTIGATION OF THE DIQUARK POTENTIAL Prepared for 23rd International Symposium on Lattice Field Field: Lattice 2005, Trinity College, Dublin, Ireland,, PoS LAT2005:310 e-Print Archive: hep-lat/0511032, 2005
S.D. Katz: EQUATION OF STATE FROM LATTICE QCD Plenary talk at 18th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions: Quark Matter 2005 (QM 2005), Budapest,, Nucl. Phys. A774 159, 2006
Z. Fodor, S.D. Katz, K.K. Szabo, A.I. Toth: GRAND CANONICAL POTENTIAL FOR A STATIC QUARK-ANTI-QUARK PAIR AT MU DOES NOT EQUAL 0, Nucl.Phys.Proc.Suppl.140:508-510 e-Print Archive: hep-lat/0410032, 2005
Z. Fodor, S.D. Katz, K.K. Szabo: DYNAMICAL OVERLAP FERMIONS, RESULTS WITH HMC ALGORITHM, Nucl.Phys.Proc.Suppl.140:704-706, 2005
L.A. Anchordoqui, Z. Fodor, S.D. Katz, A. Ringwald, H. Tu: UPPER BOUNDS ON THE NEUTRINO-NUCLEON INELASTIC CROSS SECTION, JCAP 0506:013 e-Print Archive: hep-ph/0410136, 2005
C. Schmidt, Z. Fodor, S. Katz: THE DENSITY OF STATES METHOD AT FINITE CHEMICAL POTENTIAL, JHEP 0703:121, 2007
Z Fodor, C Guse, S. D. Katz, K.K. Szabo: GRAND CANONICAL POTENTIAL FOR A STATIC QUARK-ANTIQUARK PAIR AT FINITE CHEMICAL POTENTIAL Prepared for 23rd International Symposium on Lattice Field Field: Lattice 2005, PoS LAT2005:178 e-Print Archive: hep-lat/0511033, 2005
F. Csikor, Z. Fodor, S.D. Katz, T.G. Kovacs: PENTAQUARK HADRONS FROM LATTICE QCD Prepared for 8th Workshop on Nonperturbative Quantum Chromodynamics, Paris, France, 7-11 Jun 2004, Int.J.Mod.Phys.A20:4562-4572, 2005
G.I. Egri, Z. Fodor, S.D. Katz, K.K. Szabo: TOPOLOGY WITH DYNAMICAL OVERLAP FERMIONS, JHEP 0601 049, 2006
F. Csikor, S.D. Katz, Z. Fodor, T.G. Kovacs,: EXOTIC BARYONS ON THE LATTICE Prepared for Cracow Epiphany Conference on Hadron Spectroscopy, Cracow, Poland, 6-8 Jan 2005, Acta Phys.Polon.B36:2271-2282, 2005
F. Csikor, Z. Fodor, S.D. Katz, T.G. Kovacs, B.C. Toth: COMPREHENSIVE SEARCH FOR THE THETA+ PENTAQUARK ON THE LATTICE, Phys. Rev. D73 034506, 2006
F. Csikor, Z. Fodor, S.D. Katz, T.G. Kovacs, B.C. Toth: A COMPREHENSIVE LATTICE SEARCH FOR THE THETA+ PENTAQUARK, Nucl.Phys. B Proc. Suppl. 153 49-53, 2006
Y. Aoki, Z. Fodor, S.D. Katz, K.K. Szabo: THE EQUATION OF STATE IN LATTICE QCD: WITH PHYSICAL MASSES TOWARDS THE CONTINUUM LIMIT, JHEP 0601 089, 2006
Z. Fodor: Lattice gauge theory and elementary particle physics, CPC 169 347, 2006
S. Durr, Z. Fodor, C. Hoelbling , T. Kurth: Precision study of the SU(3) topological susceptibility in the continuum, JHEP 0704:055,2007, 2007
G.I.Egri, Z.Fodor, C.Hoelbling, S.D.Katz, D.Nogradi, K.K.Szabo: Lattice QCD as a video game, Comput.Phys.Commun.177:631-639,2007, 2007
Y.Aoki, G.Endrodi, Z.Fodor, S.D.Katz, K.K.Szabo: The order of the quantum chromodynamics transition predicted by the standard model of particle physics, Nature 443 675, 2006
Y.Aoki, Z.Fodor, S.D.Katz, K.K.Szabo: The QCD transition temperature: Results with physical masses in the continuum limit, Phys. Lett. 643B 46, 2006
Z. Fodor, K.,K. Szabo,, B.C. Toth: Hadron spectroscopy from canonical partition functions, JHEP 0708:092, 2007
Y.Aoki, Z.Fodor,S.D. Katz,K.K.Szabo,B.C.Toth: QCD finite T transition Comparison between Wilson and staggered results, PoS LAT2007:232, hep-lat0711.0024, 2007
S. Durr, Z. Fodor , C. Hoelbling,S.D.Katz,S.Krieg,Th.Kurth,L.Lellouch,Th.Lippert,K.K.Szabo,G.Vulvert: Mixed action simulations: approaching physical quark masses, PoS LAT2007:113, hep-lat0710.4866, 2007
Z. Fodor,A.Jakovac,S.D.Katz,K.K.Szabo: Static quark free energies at finite temperatures, PoS LAT2007:196, hep-lat0710.4119, 2007
Z. Fodor: QCD Themodynamics, XXV Int.Symp. Lattice Field Theory Regensburg, plenary talk, hep-lat0711.0336, 2007
S. Dürr, Z. Fodor, S.D. Katz et al.: Ab Initio Determination of Light Hadron Masses, Science, 2008
G. Endrodi, Z. Fodor, S.D. Katz, K.K. Szabo: The curvature of the QCD phase transition line, PoS LATTICE2008:205,2008 e-Print: arXiv:0901.3018 [hep-lat], 2008
S. Dürr, Z. Fodor, S.D. Katz et al.: Scaling study of dynamical smeared-link clover fermions, Phys.Rev.D79:014501, 2009
T.G. Kovacs: Gapless Dirac Spectrum at High Temperature, PoS LATTICE2008:198, e-Print: arXiv:0810.4763 [hep-lat], 2008
Z. Fodor: Light hadron spectrum from lattice QCD, AIP Conf.Proc.1182:432-436,2009, 2009
Y. Aoki, S. Borsanyi, S. Durr, Z. Fodor, S.D. Katz, S. Krieg , K.K. Szabo: QCD transition temperature: Approaching the continuum on the lattice, Nucl.Phys.A830:805C-808C, 2009
Z. Fodor, S.D. Katz: The Phase diagram of quantum chromodynamics, Landolt-Boernstein v. 1-23 A, 2009
Y. Aoki, S. Borsanyi, S. Durr, Z. Fodor, S. D. Katz, S. Krieg, K. K. Szabo: The QCD transition temperature: results with physical masses in the continuum limit II., JHEP 0906:088, 2009
S. Durr, Z. Fodor, C. Hoelbling, S.D. Katz, S. Krieg, T. Kurth, L. Lellouch, T. Lippert, A. Ramos, K.K. Szabo: The ratio FK/Fpi in QCD, Phys. Rev. D elfogadva, 2010
Tamas G. Kovacs: Absence of correlations in the QCD Dirac spectrum at high temperature, Phys.Rev.Lett.104:031601, 2010



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