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  • Results from the first study of isolated-photon + jet correlations in relativistic heavy ion collisions are reported. The analysis uses data from PbPb collisions at a centre-of-mass energy of 2.76 TeV per nucleon pair corresponding to an integrated luminosity of 150 mu b(-1) recorded by the CMS experiment at the LHC. For events containing an isolated photon with transverse momentum p(T)(gamma) > 60 GeV/c and an associated jet with p(T)(Jet) > 30 GeV/c, the photon + jet P-T imbalance is studied as a function of collision centrality and compared to pp data and PYFHIA calculations at the same collision energy. Using the of the isolated photon as an estimate of the momentum of the associated parton at production, this measurement allows an unbiased characterisation of the in-medium parton energy loss. For more central PbPb collisions, a significant decrease in the ratio p(T)(Jet)/p(T)(gamma) pi. relative to that in the PYFHIA reference is observed. Furthermore, significantly more p(T)(gamma) > 60 GeV/c photons in PbPb are observed not to have an associated p(T)(Jet) > 30 GeV/c jet, compared to the reference. However, no significant broadening of the photon + jet azimuthal correlation is observed.
  • Results from the first study of isolated-photon + jet correlations in relativistic heavy ion collisions are reported. The analysis uses data from PbPb collisions at a centre-of-mass energy of 2.76 TeV per nucleon pair corresponding to an integrated luminosity of 150 mu b(-1) recorded by the CMS experiment at the LHC. For events containing an isolated photon with transverse momentum p(T)(gamma) > 60 GeV/c and an associated jet with p(T)(Jet) > 30 GeV/c, the photon + jet P-T imbalance is studied as a function of collision centrality and compared to pp data and PYFHIA calculations at the same collision energy. Using the of the isolated photon as an estimate of the momentum of the associated parton at production, this measurement allows an unbiased characterisation of the in-medium parton energy loss. For more central PbPb collisions, a significant decrease in the ratio p(T)(Jet)/p(T)(gamma) pi. relative to that in the PYFHIA reference is observed. Furthermore, significantly more p(T)(gamma) > 60 GeV/c photons in PbPb are observed not to have an associated p(T)(Jet) > 30 GeV/c jet, compared to the reference. However, no significant broadening of the photon + jet azimuthal correlation is observed. (en)
Title
  • Studies of jet quenching using isolated-photon plus jet correlations in PbPb and pp collisions at root s(NN)=2.76 TeV
  • Studies of jet quenching using isolated-photon plus jet correlations in PbPb and pp collisions at root s(NN)=2.76 TeV (en)
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  • Studies of jet quenching using isolated-photon plus jet correlations in PbPb and pp collisions at root s(NN)=2.76 TeV
  • Studies of jet quenching using isolated-photon plus jet correlations in PbPb and pp collisions at root s(NN)=2.76 TeV (en)
skos:notation
  • RIV/00216208:11320/13:10133625!RIV14-MSM-11320___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • I, P(LA08015)
http://linked.open...iv/cisloPeriodika
  • 3
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http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
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http://linked.open...dnocenehoVysledku
  • 108572
http://linked.open...ai/riv/idVysledku
  • RIV/00216208:11320/13:10133625
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • root sNN=2.76 TeV; pp collisions; PbPb collisions; jet quenching; CMS; LHC (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • NL - Nizozemsko
http://linked.open...ontrolniKodProRIV
  • [B9DAE88A4639]
http://linked.open...i/riv/nazevZdroje
  • Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 718
http://linked.open...iv/tvurceVysledku
  • Adam, W.
  • Chatrchyan, S.
  • Finger, Michael
  • Finger, Miroslav
  • Khachatryan, V.
  • Bergauer, T.
  • Dragicevic, M.
  • Eroe, J.
  • Fabjan, C.
  • Friedl, M.
  • Fruehwirth, R.
  • Ghete, V. M.
  • Hammer, J.
  • Hoermann, N.
  • Hrubec, J.
  • Jeitler, M.
  • Kiesenhofer, W.
  • Knuenz, V.
  • Krammer, M.
  • Liko, D.
  • Mikulec, I.
  • Pernicka, M.
  • Rahbaran, B.
  • Rohringer, C.
  • Rohringer, H.
  • Schoefbeck, R.
  • Sirunyan, A. M.
  • Strauss, J.
  • Taurok, A.
  • Tumasyan, A.
http://linked.open...ain/vavai/riv/wos
  • 000314259500011
issn
  • 0370-2693
number of pages
http://bibframe.org/vocab/doi
  • 10.1016/j.physletb.2012.11.003
http://localhost/t...ganizacniJednotka
  • 11320
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