About: Enhanced production of direct photons in Au+Au collisions at sqrt(s_NN)=200 GeV and implications for the initial temperature

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The production of low mass e+e- pairs for m_{e+e-} < 300 MeV/c^2 and 1 < p_T <5 GeV/c is measured in p+p and Au+Au collisions at sqrt(s_NN)=200 GeV. Enhanced yield above hadronic sources is observed. Treating the excess as internal conversions, the invariant yield of direct photons is deduced. In central Au+Au collisions, the excess of direct photon yield over p+p is exponential in transverse momentum, with inverse slope T = 221 +/- 19 (stat) +/- 19 (syst) MeV. Hydrodynamical models with initial temperatures ranging from 300--600 MeV at times of 0.6 - 0.15 fm/c after the collision are in qualitative agreement with the data. Lattice QCD predicts a phase transition to quark gluon plasma at 170 MeV. The production of low mass e+e- pairs for m_{e+e-} < 300 MeV/c^2 and 1 < p_T <5 GeV/c is measured in p+p and Au+Au collisions at sqrt(s_NN)=200 GeV. Enhanced yield above hadronic sources is observed. Treating the excess as internal conversions, the invariant yield of direct photons is deduced. In central Au+Au collisions, the excess of direct photon yield over p+p is exponential in transverse momentum, with inverse slope T = 221 +/- 19 (stat) +/- 19 (syst) MeV. Hydrodynamical models with initial temperatures ranging from 300--600 MeV at times of 0.6 - 0.15 fm/c after the collision are in qualitative agreement with the data. Lattice QCD predicts a phase transition to quark gluon plasma at 170 MeV. (en)
Title	Enhanced production of direct photons in Au+Au collisions at sqrt(s_NN)=200 GeV and implications for the initial temperature Enhanced production of direct photons in Au+Au collisions at sqrt(s_NN)=200 GeV and implications for the initial temperature (en)
skos:prefLabel	Enhanced production of direct photons in Au+Au collisions at sqrt(s_NN)=200 GeV and implications for the initial temperature Enhanced production of direct photons in Au+Au collisions at sqrt(s_NN)=200 GeV and implications for the initial temperature (en)
skos:notation	RIV/68378271:_____/10:00370231!RIV12-AV0-68378271
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(LA08015), P(LC527), Z(AV0Z10100502)
http://linked.open...iv/cisloPeriodika	13
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Vrba, Václav Tomášek, Lukáš
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Fyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	257226
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/10:00370231
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	p p: colliding beams; nucleus nucleus: colliding beams; scattering: heavy ion; photon: direct production; photon: yield; PHENIX (en)
http://linked.open.../riv/klicoveSlovo	PHENIX nucleus nucleus: colliding beams p p: colliding beams photon: yield scattering: heavy ion photon: direct production
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[D5F02671A9DD]
http://linked.open...i/riv/nazevZdroje	Physical Review Letters
http://linked.open...in/vavai/riv/obor	BF
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	8 (xsd:int)
http://linked.open...vavai/riv/projekt	Collaboration of the Czech Republic with CERN Center for Particle Physics
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	104
http://linked.open...iv/tvurceVysledku	Adare, A. Afanasiev, S. Aidala, C. Mašek, L. Mikeš, P. Tomášek, Lukáš Vrba, Václav Kubart, J.
http://linked.open...ain/vavai/riv/wos	000276260800011
http://linked.open...n/vavai/riv/zamer	Jevy fyziky elementárních částic přesahující standardní model
issn	0031-9007
number of pages	6 (xsd:int)
http://bibframe.org/vocab/doi	10.1103/PhysRevLett.104.132301
is http://linked.open...avai/riv/vysledek of	Enhanced production of direct photons in Au+Au collisions at sqrt(s_NN)=200 GeV and implications for the initial temperature Enhanced production of direct photons in Au+Au collisions at sqrt(s_NN)=200 GeV and implications for the initial temperature

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