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Measurements of dielectron production in Au plus Au collisions at root s(NN)=200 GeV from the STAR experiment

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Title Measurements of dielectron production in Au plus Au collisions at root s(NN)=200 GeV from the STAR experiment
 
Creator ADAMCZYK, L
ADKINS, JK
AGAKISHIEV, G
AGGARWAL, MM
AHAMMED, Z
ALEKSEEV, I
ALFORD, J
APARIN, A
ARKHIPKIN, D
ASCHENAUER, EC
AVERICHEV, GS
BANERJEE, A
BELLWIED, R
BHASIN, A
BHATI, AK
BHATTARAI, P
BIELCIK, J
BIELCIKOVA, J
BLAND, LC
BORDYUZHIN, IG
BOUCHET, J
BRANDIN, AV
BUNZAROV, I
BURTON, TP
BUTTERWORTH, J
CAINES, H
SANCHEZ, MCD
CAMPBELL, JM
CEBRA, D
CERVANTES, MC
CHAKABERIA, I
CHALOUPKA, P
CHANG, Z
CHATTOPADHYAY, S
CHEN, JH
CHEN, X
CHENG, J
CHERNEY, M
CHRISTIE, W
CONTIN, G
CRAWFORD, HJ
DAS, S
DE SILVA, LC
DEBBE, RR
DEDOVICH, TG
DENG, J
DEREVSCHIKOV, AA
DI RUZZA, B
DIDENKO, L
DILKS, C
DONG, X
DRACHENBERG, JL
DRAPER, JE
DU, CM
DUNKELBERGER, LE
DUNLOP, JC
EFIMOV, LG
ENGELAGE, J
EPPLEY, G
ESHA, R
EVDOKIMOV, O
EYSER, O
FATEMI, R
FAZIO, S
FEDERIC, P
FEDORISIN, J
FENG, Z
FILIP, P
FISYAK, Y
FLORES, CE
FULEK, L
GAGLIARDI, CA
GARAND, D
GEURTS, F
GIBSON, A
GIRARD, M
GREINER, L
GROSNICK, D
GUNARATHNE, DS
GUO, Y
GUPTA, S
GUPTA, A
GURYN, W
HAMAD, A
HAMED, A
HAQUE, R
HARRIS, JW
HE, L
HEPPELMANN, S
HEPPELMANN, S
HIRSCH, A
HOFFMANN, GW
HOFMAN, DJ
HORVAT, S
HUANG, B
HUANG, X
HUANG, HZ
HUCK, P
HUMANIC, TJ
IGO, G
JACOBS, WW
JANG, H
JIANG, K
JUDD, EG
JUNG, K
KABANA, S
KALINKIN, D
KANG, K
KAUDER, K
KE, HW
KEANE, D
KECHECHYAN, A
KHAN, ZH
KIKOLA, DP
KISEL, I
KISIEL, A
KOCHENDA, L
KOETKE, DD
KOLLEGGER, T
KOSARZEWSKI, LK
KRAISHAN, AF
KRAVTSOV, P
KRUEGER, K
KULAKOV, I
KUMAR, L
KYCIA, RA
LAMONT, MAC
LANDGRAF, JM
LANDRY, KD
LAURET, J
LEBEDEV, A
LEDNICKY, R
LEE, JH
LI, X
LI, C
LI, W
LI, ZM
LI, Y
LI, X
LISA, MA
LIU, F
LJUBICIC, T
LLOPE, WJ
LOMNITZ, M
LONGACRE, RS
LUO, X
MA, YG
MA, GL
MA, L
MA, R
MAGDY, N
MAJKA, R
MANION, A
MARGETIS, S
MARKERT, C
MASUI, H
MATIS, HS
MCDONALD, D
MEEHAN, K
MINAEV, NG
MIODUSZEWSKI, S
MOHANTY, B
MONDAL, MM
MOROZOV, D
MUSTAFA, MK
NANDI, BK
NASIM, M
NAYAK, TK
NIGMATKULOV, G
NOGACH, LV
NOH, SY
NOVAK, J
NURUSHEV, SB
ODYNIEC, G
OGAWA, A
OH, K
OKOROKOV, V
OLVITT, D
PAGE, BS
PAK, R
PAN, YX
PANDIT, Y
PANEBRATSEV, Y
PAWLIK, B
PEI, H
PERKINS, C
PETERSON, A
PILE, P
PLANINIC, M
PLUTA, J
POLJAK, N
PONIATOWSKA, K
PORTER, J
POSIK, M
POSKANZER, AM
PRUTHI, NK
PUTSCHKE, J
QIU, H
QUINTERO, A
RAMACHANDRAN, S
RANIWALA, R
RANIWALA, S
RAY, RL
RITTER, HG
ROBERTS, JB
ROGACHEVSKIY, OV
ROMERO, JL
ROY, A
RUAN, L
RUSNAK, J
RUSNAKOVA, O
SAHOO, NR
SAHU, PK
SAKREJDA, I
SALUR, S
SANDWEISS, J
SARKAR, A
SCHAMBACH, J
SCHARENBERG, RP
SCHMAH, AM
SCHMIDKE, WB
SCHMITZ, N
SEGER, J
SEYBOTH, P
SHAH, N
SHAHALIEV, E
SHANMUGANATHAN, PV
SHAO, M
SHARMA, MK
SHARMA, B
SHEN, WQ
SHI, SS
SHOU, QY
SICHTERMANN, EP
SIKORA, R
SIMKO, M
SKOBY, MJ
SMIRNOV, D
SMIRNOV, N
SONG, L
SORENSEN, P
SPINKA, HM
SRIVASTAVA, B
STANISLAUS, TDS
STEPANOV, M
STOCK, R
STRIKHANOV, M
STRINGFELLOW, B
SUMBERA, M
SUMMA, B
SUN, X
SUN, Z
SUN, XM
SUN, Y
SURROW, B
SVIRIDA, N
SZELEZNIAK, MA
TANG, AH
TANG, Z
TARNOWSKY, T
TAWFIK, AN
THOMAS, JH
TIMMINS, AR
TLUSTY, D
TOKAREV, M
TRENTALANGE, S
TRIBBLE, RE
TRIBEDY, P
TRIPATHY, SK
TRZECIAK, BA
TSAI, OD
ULLRICH, T
UNDERWOOD, DG
UPSAL, I
VAN BUREN, G
VAN NIEUWENHUIZEN, G
VANDENBROUCKE, M
VARMA, R
VASILIEV, AN
VERTESI, R
VIDEBAEK, F
VIYOGI, YP
VOKAL, S
VOLOSHIN, SA
VOSSEN, A
WANG, G
WANG, Y
WANG, F
WANG, Y
WANG, H
WANG, JS
WEBB, JC
WEBB, G
WEN, L
WESTFALL, GD
WIEMAN, H
WISSINK, SW
WITT, R
WU, YF
XIAO, ZG
XIE, W
XIN, K
XU, QH
XU, Z
XU, H
XU, N
XU, YF
YANG, Q
YANG, Y
YANG, S
YANG, Y
YANG, C
YE, Z
YEPES, P
YI, L
YIP, K
YOO, IK
YU, N
ZBROSZCZYK, H
ZHA, W
ZHANG, XP
ZHANG, J
ZHANG, Y
ZHANG, J
ZHANG, JB
ZHANG, S
ZHANG, Z
ZHAO, J
ZHONG, C
ZHOU, L
ZHU, X
ZOULKARNEEVA, Y
ZYZAK, M
 
Subject RELATIVISTIC NUCLEAR COLLISIONS
SUPER-PROTON SYNCHROTRON
HEAVY-ION COLLISIONS
DILEPTON PRODUCTION
CHIRAL RESTORATION
TRANSPORT APPROACH
SPS ENERGIES
CERN-SPS
MULTIPLICITY
FLOW
 
Description We report on measurements of dielectron (e(+) e(-)) production in Au + Au collisions at a center-of-mass energy of 200 GeV per nucleon-nucleon pair using the STAR detector at BNL Relativistic Heavy Ion Collider. Systematic measurements of the dielectron yield as a function of transverse momentum (p(T)) and collision centrality show an enhancement compared to a cocktail simulation of hadronic sources in the low invariant-mass region (M-ee < 1 GeV / c(2)). This enhancement cannot be reproduced by the rho-meson vacuum spectral function. In minimum-bias collisions, in the invariant-mass range of 0.30-0.76 GeV / c(2), integrated over the full pT acceptance, the enhancement factor is 1.76 +/- 0.06 (stat.) +/- 0.26 (sys.) +/- 0.29 (cocktail). The enhancement factor exhibits weak centrality and pT dependence in STAR's accessible kinematic regions, while the excess yield in this invariant-mass region as a function of the number of participating nucleons follows a power-law shape with a power of 1.44 +/- 0.10. Models that assume an in-medium broadening of the rho-meson spectral function consistently describe the observed excess in these measurements. Additionally, we report on measurements of omega-and phi-meson production through their e+ e(-) decay channel. These measurements show good agreement with Tsallis blast-wave model predictions, as well as, in the case of the phi meson, results through its K+ K- decay channel. In the intermediate invariant-mass region (1.1 < Mee < 3 GeV / c(2)), we investigate the spectral shapes from different collision centralities. Physics implications for possible in-medium modification of charmed hadron production and other physics sources are discussed.
 
Publisher AMER PHYSICAL SOC
 
Date 2016-01-15T08:38:15Z
2016-01-15T08:38:15Z
2015
 
Type Article
 
Identifier PHYSICAL REVIEW C, 92(2)
0556-2813
1089-490X
http://dx.doi.org/10.1103/PhysRevC.92.024912
http://dspace.library.iitb.ac.in/jspui/handle/100/18183
 
Language en