- 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
- Calderón De La Barca Sánchez, M
- 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
- et al.
© 2015 American Physical Society. ©2015 American Physical Society. 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 (pT) and collision centrality show an enhancement compared to a cocktail simulation of hadronic sources in the low invariant-mass region (Mee<1GeV/c2). This enhancement cannot be reproduced by the ρ-meson vacuum spectral function. In minimum-bias collisions, in the invariant-mass range of 0.30-0.76GeV/c2, 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 ρ-meson spectral function consistently describe the observed excess in these measurements. Additionally, we report on measurements of ω- and φ-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 φ meson, results through its K+K- decay channel. In the intermediate invariant-mass region (1.1