Beam energy dependent two-pion interferometry and the freeze-out eccentricity of pions in heavy ion collisions at STAR
Creators: name: STAR Collaboration
name: Adamczyk, L.
name: Adkins, J. K.
name: Agakishiev, G.
name: Aggarwal, M. M.
name: Ahammed, Z.
name: Alekseev, I.
name: Alford, J.
name: Anson, C. D.
name: Aparin, A.
name: Arkhipkin, D.
name: Aschenauer, E. C.
name: Averichev, G. S.
name: Banerjee, A.
name: Beavis, D. R.
name: Bellwied, R.
name: Bhasin, A.
name: Bhati, A. K.
name: Bhattarai, P.
name: Bichsel, H.
name: Bielcik, J.
name: Bielcikova, J.
name: Bland, L. C.
name: Bordyuzhin, I. G.
name: Borowski, W.
name: Bouchet, J.
name: Brandin, A. V.
name: Brovko, S. G.
name: Bültmann, S.
name: Bunzarov, I.
name: Burton, T. P.
name: Butterworth, J.
name: Caines, H.
name: Sánchez, M. Calderón de la Barca
name: Cebra, D.
name: Cendejas, R.
name: Cervantes, M. C.
name: Chaloupka, P.
name: Chang, Z.
name: Chattopadhyay, S.
name: Chen, H. F.
name: Chen, J. H.
name: Chen, L.
name: Cheng, J.
name: Cherney, M.
name: Chikanian, A.
name: Christie, W.
name: Chwastowski, J.
name: Codrington, M. J. M.
name: Contin, G.
name: Cramer, J. G.
name: Crawford, H. J.
name: Cui, X.
name: Das, S.
name: Leyva, A. Davila
name: De Silva, L. C.
name: Debbe, R. R.
name: Dedovich, T. G.
name: Deng, J.
name: Derevschikov, A. A.
name: de Souza, R. Derradi
name: Dhamija, S.
name: di Ruzza, B.
name: Didenko, L.
name: Dilks, C.
name: Ding, F.
name: Djawotho, P.
name: Dong, X.
name: Drachenberg, J. L.
name: Draper, J. E.
name: Du, C. M.
name: Dunkelberger, L. E.
name: Dunlop, J. C.
name: Efimov, L. G.
name: Engelage, J.
name: Engle, K. S.
name: Eppley, G.
name: Eun, L.
name: Evdokimov, O.
name: Eyser, O.
name: Fatemi, R.
name: Fazio, S.
name: Fedorisin, J.
name: Filip, P.
name: Finch, E.
name: Fisyak, Y.
name: Flores, C. E.
name: Gagliardi, C. A.
name: Gangadharan, D. R.
name: Garand, D.
name: Geurts, F.
name: Gibson, A.
name: Girard, M.
name: Gliske, S.
name: Greiner, L.
name: Grosnick, D.
name: Gunarathne, D. S.
name: Guo, Y.
name: Gupta, A.
name: Gupta, S.
name: Guryn, W.
name: Haag, B.
name: Hamed, A.
name: Han, L-X.
name: Haque, R.
name: Harris, J. W.
name: Heppelmann, S.
name: Hirsch, A.
name: Hoffmann, G. W.
name: Hofman, D. J.
name: Horvat, S.
name: Huang, B.
name: Huang, H. Z.
name: Huang, X.
name: Huck, P.
name: Humanic, T. J.
name: Igo, G.
name: Jacobs, W. W.
name: Jang, H.
name: Judd, E. G.
name: Kabana, S.
name: Kalinkin, D.
name: Kang, K.
name: Kauder, K.
name: Ke, H. W.
name: Keane, D.
name: Kechechyan, A.
name: Kesich, A.
name: Khan, Z. H.
name: Kikola, D. P.
name: Kisel, I.
name: Kisiel, A.
name: Koetke, D. D.
name: Kollegger, T.
name: Konzer, J.
name: Koralt, I.
name: Kosarzewski, L. K.
name: Kotchenda, L.
name: Kraishan, A. F.
name: Kravtsov, P.
name: Krueger, K.
name: Kulakov, I.
name: Kumar, L.
name: Kycia, R. A.
name: Lamont, M. A. C.
name: Landgraf, J. M.
name: Landry, K. D.
name: Lauret, J.
name: Lebedev, A.
name: Lednicky, R.
name: Lee, J. H.
name: LeVine, M. J.
name: Li, C.
name: Li, W.
name: Li, X.
name: Li, X.
name: Li, Y.
name: Li, Z. M.
name: Lisa, M. A.
name: Liu, F.
name: Ljubicic, T.
name: Llope, W. J.
name: Lomnitz, M.
name: Longacre, R. S.
name: Luo, X.
name: Ma, G. L.
name: Ma, Y. G.
name: Don, D. M. M. D. Madagodagettige
name: Mahapatra, D. P.
name: Majka, R.
name: Margetis, S.
name: Markert, C.
name: Masui, H.
name: Matis, H. S.
name: McDonald, D.
name: McShane, T. S.
name: Minaev, N. G.
name: Mioduszewski, S.
name: Mohanty, B.
name: Mondal, M. M.
name: Morozov, D. A.
name: Mustafa, M. K.
name: Nandi, B. K.
name: Nasim, Md.
name: Nayak, T. K.
name: Nelson, J. M.
name: Nigmatkulov, G.
name: Nogach, L. V.
name: Noh, S. Y.
name: Novak, J.
name: Nurushev, S. B.
name: Odyniec, G.
name: Ogawa, A.
name: Oh, K.
name: Ohlson, A.
name: Okorokov, V.
name: Oldag, E. W.
name: Olvitt, D. L.
name: Pachr, M.
name: Page, B. S.
name: Pal, S. K.
name: Pan, Y. X.
name: Pandit, Y.
name: Panebratsev, Y.
name: Pawlak, T.
name: Pawlik, B.
name: Pei, H.
name: Perkins, C.
name: Peryt, W.
name: Pile, P.
name: Planinic, M.
name: Pluta, J.
name: Poljak, N.
name: Poniatowska, K.
name: Porter, J.
name: Poskanzer, A. M.
name: Pruthi, N. K.
name: Przybycien, M.
name: Pujahari, P. R.
name: Putschke, J.
name: Qiu, H.
name: Quintero, A.
name: Ramachandran, S.
name: Raniwala, R.
name: Raniwala, S.
name: Ray, R. L.
name: Riley, C. K.
name: Ritter, H. G.
name: Roberts, J. B.
name: Rogachevskiy, O. V.
name: Romero, J. L.
name: Ross, J. F.
name: Roy, A.
name: Ruan, L.
name: Rusnak, J.
name: Rusnakova, O.
name: Sahoo, N. R.
name: Sahu, P. K.
name: Sakrejda, I.
name: Salur, S.
name: Sandweiss, J.
name: Sangaline, E.
name: Sarkar, A.
name: Schambach, J.
name: Scharenberg, R. P.
name: Schmah, A. M.
name: Schmidke, W. B.
name: Schmitz, N.
name: Seger, J.
name: Seyboth, P.
name: Shah, N.
name: Shahaliev, E.
name: Shanmuganathan, P. V.
name: Shao, M.
name: Sharma, B.
name: Shen, W. Q.
name: Shi, S. S.
name: Shou, Q. Y.
name: Sichtermann, E. P.
name: Singaraju, R. N.
name: Skoby, M. J.
name: Smirnov, D.
name: Smirnov, N.
name: Solanki, D.
name: Sorensen, P.
name: Spinka, H. M.
name: Srivastava, B.
name: Stanislaus, T. D. S.
name: Stevens, J. R.
name: Stock, R.
name: Strikhanov, M.
name: Stringfellow, B.
name: Sumbera, M.
name: Sun, X.
name: Sun, X. M.
name: Sun, Y.
name: Sun, Z.
name: Surrow, B.
name: Svirida, D. N.
name: Symons, T. J. M.
name: Szelezniak, M. A.
name: Takahashi, J.
name: Tang, A. H.
name: Tang, Z.
name: Tarnowsky, T.
name: Thomas, J. H.
name: Timmins, A. R.
name: Tlusty, D.
name: Tokarev, M.
name: Trentalange, S.
name: Tribble, R. E.
name: Tribedy, P.
name: Trzeciak, B. A.
name: Tsai, O. D.
name: Turnau, J.
name: Ullrich, T.
name: Underwood, D. G.
name: Van Buren, G.
name: van Nieuwenhuizen, G.
name: Vandenbroucke, M.
name: Vanfossen,, J. A.
name: Varma, R.
name: Vasconcelos, G. M. S.
name: Vasiliev, A. N.
name: Vertesi, R.
name: Videbæk, F.
name: Viyogi, Y. P.
name: Vokal, S.
name: Vossen, A.
name: Wada, M.
name: Wang, F.
name: Wang, G.
name: Wang, H.
name: Wang, J. S.
name: Wang, X. L.
name: Wang, Y.
name: Wang, Y.
name: Webb, G.
name: Webb, J. C.
name: Westfall, G. D.
name: Wieman, H.
name: Wissink, S. W.
name: Witt, R.
name: Wu, Y. F.
name: Xiao, Z.
name: Xie, W.
name: Xin, K.
name: Xu, H.
name: Xu, J.
name: Xu, N.
name: Xu, Q. H.
name: Xu, Y.
name: Xu, Z.
name: Yan, W.
name: Yang, C.
name: Yang, Y.
name: Yang, Y.
name: Ye, Z.
name: Yepes, P.
name: Yi, L.
name: Yip, K.
name: Yoo, I-K.
name: Yu, N.
name: Zawisza, Y.
name: Zbroszczyk, H.
name: Zha, W.
name: Zhang, J. B.
name: Zhang, J. L.
name: Zhang, S.
name: Zhang, X. P.
name: Zhang, Y.
name: Zhang, Z. P.
name: Zhao, F.
name: Zhao, J.
name: Zhong, C.
name: Zhu, X.
name: Zhu, Y. H.
name: Zoulkarneeva, Y.
name: Zyzak, M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We present results of analyses of two-pion interferometry in Au+Au collisions at $\sqrt{s_{NN}}$ = 7.7, 11.5, 19.6, 27, 39, 62.4 and 200 GeV measured in the STAR detector as part of the RHIC Beam Energy Scan program. The extracted correlation lengths (HBT radii) are studied as a function of beam energy, azimuthal angle relative to the reaction plane, centrality, and transverse mass ($m_{T}$) of the particles. The azimuthal analysis allows extraction of the eccentricity of the entire fireball at kinetic freeze-out. The energy dependence of this observable is expected to be sensitive to changes in the equation of state. A new global fit method is studied as an alternate method to directly measure the parameters in the azimuthal analysis. The eccentricity shows a monotonic decrease with beam energy that is qualitatively consistent with the trend from all model predictions and quantitatively consistent with a hadronic transport model.
description: 27 pages; 27 figures