Genre
Journal ArticleDate
2014-07-09Author
Adamczyk, LAdkins, JK
Agakishiev, G
Aggarwal, MM
Ahammed, Z
Alekseev, I
Alford, J
Anson, CD
Aparin, A
Arkhipkin, D
Aschenauer, EC
Averichev, GS
Banerjee, A
Barnovska, Z
Beavis, DR
Bellwied, R
Bhasin, A
Bhati, AK
Bhattarai, P
Bichsel, H
Bielcik, J
Bielcikova, J
Bland, LC
Bordyuzhin, IG
Borowski, W
Bouchet, J
Brandin, AV
Brovko, SG
Bültmann, S
Bunzarov, I
Burton, TP
Butterworth, J
Caines, H
Calderón De La Barca Sánchez, M
Cebra, D
Cendejas, R
Cervantes, MC
Chaloupka, P
Chang, Z
Chattopadhyay, S
Chen, HF
Chen, JH
Chen, L
Cheng, J
Cherney, M
Chikanian, A
Christie, W
Chwastowski, J
Codrington, MJM
Cramer, JG
Crawford, HJ
Cui, X
Das, S
Davila Leyva, A
De Silva, LC
Debbe, RR
Dedovich, TG
Deng, J
Derevschikov, AA
Derradi De Souza, R
Dhamija, S
Di Ruzza, B
Didenko, L
Dilks, C
Ding, F
Djawotho, P
Dong, X
Drachenberg, JL
Draper, JE
Du, CM
Dunkelberger, LE
Dunlop, JC
Efimov, LG
Engelage, J
Engle, KS
Eppley, G
Eun, L
Evdokimov, O
Fatemi, R
Fazio, S
Fedorisin, J
Filip, P
Finch, E
Fisyak, Y
Flores, CE
Gagliardi, CA
Gangadharan, DR
Garand, D
Geurts, F
Gibson, A
Girard, M
Gliske, S
Grosnick, D
Guo, Y
Gupta, A
Gupta, S
Guryn, W
Haag, B
Hajkova, O
Hamed, A
Subject
STAR CollaborationPermanent link to this record
http://hdl.handle.net/20.500.12613/5874
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10.1103/PhysRevLett.113.022301Abstract
We report the STAR measurements of dielectron (e+e-) production at midrapidity (|yee|<1) in Au+Au collisions at sNN=200GeV. The measurements are evaluated in different invariant mass regions with a focus on 0.30-0.76 (ρ-like), 0.76-0.80 (ω-like), and 0.98-1.05 (φ-like) GeV/c2. The spectrum in the ω-like and φ-like regions can be well described by the hadronic cocktail simulation. In the ρ-like region, however, the vacuum ρ 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 ρ meson. The excess yield in the ρ-like region increases with the number of collision participants faster than the ω and φ yields. Theoretical models with broadened ρ 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. © 2014 American Physical Society.Citation to related work
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http://dx.doi.org/10.34944/dspace/5856