Energy dependence of acceptance-corrected dielectron excess mass spectrum at mid-rapidity in Au+Au collisions at sNN=19.6 and 200 GeV
- Adamczyk, L.
- Adkins, J.K.
- Agakishiev, G.
- Aggarwal, M.M.
- Ahammed, Z.
- Alekseev, I.
- Alford, J.
- Aparin, A.
- Arkhipkin, D.
- Aschenauer, E.C.
- Averichev, G.S.
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- Bouchet, J.
- Brandin, A.V.
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- Burton, T.P.
- Butterworth, J.
- Caines, H.
- Calder'on de la Barca S'anchez, M.
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- Feng,
- Filip, P.
- Fisyak, Y.
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- Gibson, A.
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- Grosnick, D.
- Gunarathne, D.S.
- Guo, Y.
- Gupta, S.
- Gupta, A.
- Guryn, W.
- Hamad, A.
- Hamed, A.
- Haque, R.
- Harris, J.W.
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- Heppelmann, S.
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- Hoffmann, G.W.
- Hofman, D.J.
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- Kosarzewski, L.K.
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- Van Buren, G.
- van Nieuwenhuizen, G.
- Vandenbroucke, M.
- Varma, R.
- Vasiliev, A.N.
- Vertesi, R.
- Videbaek, F.
- Viyogi, Y.P.
- Vokal, S.
- Voloshin, S.A.
- Vossen, A.
- Wang, Y.
- Wang, F.
- Wang, H.
- Wang, J.S.
- Wang, G.
- Wang, Y.
- Webb, J.C.
- Webb, G.
- Wen, L.
- Westfall, G.D.
- Wieman, H.
- Wissink, S.W.
- Witt, R.
- Wu, Y.F.
- Xiao, Z.
- Xie, W.
- Xin, K.
- Xu, Z.
- Xu, Q.H.
- Xu, N.
- Xu, H.
- Xu, Y.F.
- Yang, Y.
- Yang, C.
- Yang, S.
- Yang, Q.
- Yang, Y.
- Ye, Z.
- Yepes, P.
- Yi, L.
- Yip, K.
- Yoo, I.-K.
- Yu, N.
- Zbroszczyk, H.
- Zha, W.
- Zhang, J.B.
- Zhang, X.P.
- Zhang, S.
- Zhang, J.
- Zhang, Z.
- Zhang, Y.
- Zhang, J.L.
- Zhao, F.
- Zhao, J.
- Zhong, C.
- Zhou, L.
- Zhu, X.
- Zoulkarneeva, Y.
- Zyzak, M.
Publication date
November 2015
DOI Publisher
The Authors. Published by Elsevier B.V.Abstract
AbstractThe acceptance-corrected dielectron excess mass spectra, where the known hadronic sources have been subtracted from the inclusive dielectron mass spectra, are reported for the first time at mid-rapidity |yee|<1 in minimum-bias Au+Au collisions at sNN=19.6 and 200 GeV. The excess mass spectra are consistently described by a model calculation with a broadened ρ spectral function for Mee<1.1 GeV/c2. The integrated dielectron excess yield at sNN=19.6 GeV for 0.4<Mee<0.75 GeV/c2, normalized to the charged particle multiplicity at mid-rapidity, has a value similar to that in In+In collisions at sNN=17.3 GeV. For sNN=200 GeV, the normalized excess yield in central collisions is higher than that at sNN=17.3 GeV and increases from peripheral...
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