About: Dielectron Mass Spectra from Au plus Au Collisions at root s(NN)=200 Ge V

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We report the STAR measurements of dielectron (e(+)e(-)) production at midrapidity (vertical bar y(ee)vertical bar < 1) in Au + Au collisions at root s(NN) = 200 GeV. The measurements are evaluated in different invariant mass regions with a focus on 0.30-0.76 (rho-like), 0.76-0.80 (omega-like), and 0.98-1.05 (phi-like) GeV/c(2). The spectrum in the omega-like and phi-like regions can be well described by the hadronic cocktail simulation. In the rho-like region, however, the vacuum rho spectral function cannot describe the shape of the dielectron excess. In this range, an enhancement of 1.77 +/- 0.11(stat) +/- 0.24(syst) +/- 0.33(cocktail) is determined with respect to the hadronic cocktail simulation that excludes the rho meson. The excess yield in the rho-like region increases with the number of collision participants faster than the omega and phi yields. Theoretical models with broadened rho contributions through interactions with constituents in the hot QCD medium provide a consistent description of the dilepton mass spectra for the measurement presented here and the earlier data at the Super Proton Synchrotron energies. We report the STAR measurements of dielectron (e(+)e(-)) production at midrapidity (vertical bar y(ee)vertical bar < 1) in Au + Au collisions at root s(NN) = 200 GeV. The measurements are evaluated in different invariant mass regions with a focus on 0.30-0.76 (rho-like), 0.76-0.80 (omega-like), and 0.98-1.05 (phi-like) GeV/c(2). The spectrum in the omega-like and phi-like regions can be well described by the hadronic cocktail simulation. In the rho-like region, however, the vacuum rho spectral function cannot describe the shape of the dielectron excess. In this range, an enhancement of 1.77 +/- 0.11(stat) +/- 0.24(syst) +/- 0.33(cocktail) is determined with respect to the hadronic cocktail simulation that excludes the rho meson. The excess yield in the rho-like region increases with the number of collision participants faster than the omega and phi yields. Theoretical models with broadened rho contributions through interactions with constituents in the hot QCD medium provide a consistent description of the dilepton mass spectra for the measurement presented here and the earlier data at the Super Proton Synchrotron energies. (en)
Title	Dielectron Mass Spectra from Au plus Au Collisions at root s(NN)=200 Ge V Dielectron Mass Spectra from Au plus Au Collisions at root s(NN)=200 Ge V (en)
skos:prefLabel	Dielectron Mass Spectra from Au plus Au Collisions at root s(NN)=200 Ge V Dielectron Mass Spectra from Au plus Au Collisions at root s(NN)=200 Ge V (en)
skos:notation	RIV/68407700:21340/14:00219296!RIV15-MSM-21340___
http://linked.open...avai/riv/aktivita	I P S
http://linked.open...avai/riv/aktivity	I, P(GA13-20841S), S
http://linked.open...iv/cisloPeriodika	2
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Chaloupka, Petr Pachr, Miloš Bielčík, Jaroslav
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	České vysoké učení technické v Praze / Fakulta jaderná a fyzikálně inženýrská
http://linked.open...dnocenehoVysledku	11392
http://linked.open...ai/riv/idVysledku	RIV/68407700:21340/14:00219296
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	HEAVY-ION COLLISIONS; QUARK-GLUON PLASMA; COLLABORATION; RESTORATION; PERSPECTIVE; DILEPTONS; MATTER (en)
http://linked.open.../riv/klicoveSlovo	DILEPTONS COLLABORATION PERSPECTIVE QUARK-GLUON PLASMA RESTORATION HEAVY-ION COLLISIONS MATTER
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[0487A04CE449]
http://linked.open...i/riv/nazevZdroje	PHYSICAL REVIEW LETTERS
http://linked.open...in/vavai/riv/obor	BG
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	353 (xsd:int)
http://linked.open...vavai/riv/projekt	Studium jaderné hmoty v ultra-relativistických jaderných srážkách na urychlovači RHIC
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	113
http://linked.open...iv/tvurceVysledku	Agakishiev, G. Aggarwal, M. M. Ahammed, Z. Chaloupka, Petr Bielčík, Jaroslav Pachr, Miloš Adamczyk, L. Adkins, J. K. Trzeciak, Barbara Antonina
http://linked.open...ain/vavai/riv/wos	000338743400004
issn	0031-9007
number of pages	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1103/PhysRevLett.113.022301
http://localhost/t...ganizacniJednotka	21340

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