Energy dependence of acceptance-corrected dielectron excess mass spectrum at mid-rapidity in Au+Au collisions at sNN=19.6 and 200 GeV

• DOI: 10.1016/j.physletb.2015.08.044
• Publication Date: 2015-08-20T15:46:53Z
• Authors: L. Adamczyk; J.K. Adkins; G. Agakishiev; M.M. Aggarwal; Z. Ahammed; I. Alekseev; J. Alford; A. Aparin; D. Arkhipkin; E.C. Aschenauer; G.S. Averichev; A. Banerjee; R. Bellwied; A. Bhasin; A.K. Bhati; P. Bhattarai; J. Bielcik; J. Bielcikova; L.C. Bland; I.G. Bordyuzhin; J. Bouchet; A.V. Brandin; I. Bunzarov; T.P. Burton; J. Butterworth; H. Caines; M. Calder'on de l...; J.M. Campbell; D. Cebra; M.C. Cervantes; I. Chakaberia; P. Chaloupka; Z. Chang; S. Chattopadhyay; J.H. Chen; X. Chen; J. Cheng; M. Cherney; W. Christie; M.J.M. Codrington; G. Contin; H.J. Crawford; S. Das; L.C. De Silva; R.R. Debbe; T.G. Dedovich; J. Deng; A.A. Derevschikov; B. di Ruzza; L. Didenko; C. Dilks; X. Dong; J.L. Drachenberg; J.E. Draper; C.M. Du; L.E. Dunkelberger; J.C. Dunlop; L.G. Efimov; J. Engelage; G. Eppley; R. Esha; O. Evdokimov; O. Eyser; R. Fatemi; S. Fazio; P. Federic; J. Fedorisin; Feng; P. Filip; Y. Fisyak; C.E. Flores; L. Fulek; C.A. Gagliardi; D. Garand; F. Geurts; A. Gibson; M. Girard; L. Greiner; D. Grosnick; D.S. Gunarathne; Y. Guo; S. Gupta; A. Gupta; W. Guryn; A. Hamad; A. Hamed; R. Haque; J.W. Harris; L. He; S. Heppelmann; A. Hirsch; G.W. Hoffmann; D.J. Hofman; S. Horvat; H.Z. Huang; X. Huang; B. Huang; P. Huck; T.J. Humanic; G. Igo; W.W. Jacobs; H. Jang; K. Jiang; E.G. Judd; S. Kabana; D. Kalinkin; K. Kang; K. Kauder; H.W. Ke; D. Keane; A. Kechechyan; Z.H. Khan; D.P. Kikola; I. Kisel; A. Kisiel; S.R. Klein; D.D. Koetke; T. Kollegger; L.K. Kosarzewski; L. Kotchenda; A.F. Kraishan; P. Kravtsov; K. Krueger; I. Kulakov; L. Kumar; R.A. Kycia; M.A.C. Lamont; J.M. Landgraf; K.D. Landry; J. Lauret; A. Lebedev; R. Lednicky; J.H. Lee; X. Li; X. Li; W. Li; Z.M. Li; Y. Li; C. Li; M.A. Lisa; F. Liu; T. Ljubicic; W.J. Llope; M. Lomnitz; R.S. Longacre; X. Luo; L. Ma; R. Ma; G.L. Ma; Y.G. Ma; N. Magdy; R. Majka; A. Manion; S. Margetis; C. Markert; H. Masui; H.S. Matis; D. McDonald; K. Meehan; N.G. Minaev; S. Mioduszewski; B. Mohanty; M.M. Mondal; D.A. Morozov; M.K. Mustafa; B.K. Nandi; Md. Nasim; T.K. Nayak; G. Nigmatkulov; L.V. Nogach; S.Y. Noh; J. Novak; S.B. Nurushev; G. Odyniec; A. Ogawa; K. Oh; V. Okorokov; D.L. Olvitt; B.S. Page; Y.X. Pan; Y. Pandit; Y. Panebratsev; T. Pawlak; B. Pawlik; H. Pei; C. Perkins; A. Peterson; P. Pile; M. Planinic; J. Pluta; N. Poljak; K. Poniatowska; J. Porter; M. Posik; A.M. Poskanzer; N.K. Pruthi; J. Putschke; H. Qiu; A. Quintero; S. Ramachandran; R. Raniwala; S. Raniwala; R.L. Ray; H.G. Ritter; J.B. Roberts; O.V. Rogachevskiy; J.L. Romero; A. Roy; L. Ruan; J. Rusnak; O. Rusnakova; N.R. Sahoo; P.K. Sahu; I. Sakrejda; S. Salur; A. Sandacz; J. Sandweiss; A. Sarkar; J. Schambach; R.P. Scharenberg; A.M. Schmah; W.B. Schmidke; N. Schmitz; J. Seger; P. Seyboth; N. Shah; E. Shahaliev; P.V. Shanmuganathan; M. Shao; M.K. Sharma; B. Sharma; W.Q. Shen; S.S. Shi; Q.Y. Shou; E.P. Sichtermann; R. Sikora; M. Simko; M.J. Skoby; N. Smirnov; D. Smirnov; D. Solanki; L. Song; P. Sorensen; H.M. Spinka; B. Srivastava; T.D.S. Stanislaus; R. Stock; M. Strikhanov; B. Stringfellow; M. Sumbera; B.J. Summa; Y. Sun; Z. Sun; X.M. Sun; X. Sun; B. Surrow; D.N. Svirida; M.A. Szelezniak; J. Takahashi; A.H. Tang; Z. Tang; T. Tarnowsky; A.N. Tawfik; J.H. Thomas; A.R. Timmins; D. Tlusty; M. Tokarev; S. Trentalange; R.E. Tribble; P. Tribedy; S.K. Tripathy; B.A. Trzeciak; O.D. Tsai; T. Ullrich; D.G. Underwood; I. Upsal; G. Van Buren; G. van Nieuwenhuizen; M. Vandenbroucke; R. Varma; A.N. Vasiliev; R. Vertesi; F. Videbaek; Y.P. Viyogi; S. Vokal; S.A. Voloshin; A. Vossen; Y. Wang; F. Wang; H. Wang; J.S. Wang; G. Wang; Y. Wang; J.C. Webb; G. Webb; L. Wen; G.D. Westfall; H. Wieman; S.W. Wissink; R. Witt; Y.F. Wu; Z. Xiao; W. Xie; K. Xin; Z. Xu; Q.H. Xu; N. Xu; H. Xu; Y.F. Xu; Y. Yang; C. Yang; S. Yang; Q. Yang; Y. Yang; Z. Ye; P. Yepes; L. Yi; K. Yip; I.-K. Yoo; N. Yu; H. Zbroszczyk; W. Zha; J.B. Zhang; X.P. Zhang; S. Zhang; J. Zhang; Z. Zhang; Y. Zhang; J.L. Zhang; F. Zhao; J. Zhao; C. Zhong; L. Zhou; X. Zhu; Y. Zoulkarneeva; M. Zyzak
• Keywords: Multiplicity (mathematics)

The acceptance-corrected dielectron excess mass spectra, where the known hadronic sources have been subtracted from inclusive are reported for first time at mid-rapidity |yee|<1 in minimum-bias Au+Au collisions sNN=19.6 and 200 GeV. spectra consistently described by a model calculation with broadened ρ spectral function Mee<1.1GeV/c2. integrated yield sNN=19.6GeV 0.4<Mee<0.75GeV/c2, normalized to charged particle multiplicity mid-rapidity, has value similar that In+In sNN=17.3GeV. For sNN=200GeV, central is higher than sNN=17.3GeV increases peripheral collisions. These measurements indicate lifetime of hot, dense medium created sNN=200GeV longer those lower energies.