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2015
preprint
The $\phi (1020)\rightarrow e^{+}e^{-}$ meson decay measured with the STAR experiment in Au+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV
L. Adamczyk, I.-K. Yoo, A. Lebedev, M. C. Cervantes, J.H. Chen, M. J. M. Codrington, Nasim, K. Krueger, H. Spinka, Hyeon-Geun Jang, F. Liu, Y. Zhang, G. Nigmatkulov, S. Mioduszewski, Q. Y. Shou, W. Zha, Y. Fisyak, Y. Pandit, B. Surrow, J. Rusňák, S. Das, Z. Tang, J. M. Landgraf, S. S. Shi, Q. Yang, K. Xin, C. Li, S. Heppelmann, J. Seger, B. S. Page, G. van Nieuwenhuizen, G. D. Westfall, Xiang-Kun Dong, J. E. Draper, J. W. Harris, K. Kauder, J. B. Roberts, Q. Xu, C. E. Flores, M. Vandenbroucke, J. Zhao, P. Seyboth, F. Videb, Y. C. Yang, M. Simko, H. Wang, A. M. Poskanzer, L. Kumar, J. Novák, Y. Zoulkarneeva, J. Fedorišin, J.L. Zhang, В. А. Окороков, W. Guryn, T. P. Burton, R. A. Kycia, R. Esha, B. A. Trzeciak, A. Ogawa, H. Masui, B. Sharma, A. Quintero, A. Peterson, S. Y. Noh, F. Zhao, M. Stepanov, L.C. De Silva, Bo Huang, R. Lednický, M. Tokarev, S. M. Gibson, K. H. Kang, H. Zbroszczyk, I. Alekseev, П. Кравцов, I. Upsal, L. Greiner, L. C. Bland, M. M. Aggarwal, N. Xu, W. B. Schmidke, R. Varma, Yong-Liang Ma, A. Hamed, P. Chaloupka, D. Mcdonald, W. Li, T. J. Humanic, Basanta Kumar Nandi, J. Bielčíková, Z.M. Li, Н. Н. Смирнов, O. Evdokimov, F. Wang, M. Šumbera, D. Olvitt, O. V. Rogachevskiy, J. H. Thomas, G. Van Buren, M. Strikhanov, C. M. Du, C.G. Yang, Y. Sun, M. Cherney, A. K. Bhati, H. Qiu, Z. Ahammed, N. Schmitz, N. Poljak, M. Planinić, C. Markert, W. Q. Shen, T.K. Nayak, Yue Pan, M. K. Mustafa, W. Xie, T. Pawlak, T. Ljubičić, L. Wen, S. Fazio, S. Salur, M. Shao, A. Kisiel, M.A.C. Lamont, I. Chakaberia, D. D. Koetke, M. J. Skoby, C. A. Gagliardi, R. P. Scharenberg, R. S. Longacre, J. M. Butterworth, J. Zhang, K. Jiang, X. Chen, X. Sun, I. Bunzarov, N. Magdy, A. Kechechyan, H. Pei, Y. P. Viyogi, M. Posik, D. Grosnick, J.B. Zhang, T. D. S. Stanislaus, S. W. Wissink, H. W. Ke, K. Meehan, S. Zhang, J. M. Campbell, I. G. Bordyuzhin, Yue-Liang Wu, W. W. Jacobs, L. G. Efimov, J. Cheng, A. Manion, G. Odyniec, Y. Li, A. Aparin, M. Sharma, C. Perkins, L.L. Ma, L. Ruan, R. Sikora, D. Tlusty, X. Luo, L. V. Nogach, P. Federic, Róbert Vértesi, Z. Ye, R. E. Tribble, P. Tribedy, M. R. Haque, B. Summa, J. Lauret, Y. Wang, J. L. Romero, J. C. Dunlop, Y. Panebratsev, P. V. Shanmuganathan, P. Pile, D. Cebra, N. G. Minaev, D. Arkhipkin, A. I. Hamad, Lisa Lisa Lisa, J. Bielčík, Xiaohui Zhu, Jonathan Bouchet, K. Oh, N. R. Sahoo, S. Vokál, W. J. Llope, Т. Г. Дедович, G. Eppley, A. Bhasin, A. V. Brandin, D. G. Underwood, C. Zhong, S. Ramachandran, D. N. Svirida, A. Vossen, A. Banerjee, E. C. Aschenauer, G. Igo, L. E. Dunkelberger, D. S. Gunarathne, E. Shahaliev, A. N. Vasiliev, J. K. Adkins, K. Yip, D. Smirnov, H. Wieman, X. Li, G.L. Ma, D. A. Morozov, H. Caines, Handong Huang, R. Majka, J. Alford, T. Kollegger, A. M. Schmah, M. Girard, Z. Zhang, R. R. Debbe, G. Wang, R. Pak, S. Trentalange, Abdel Nasser Tawfik, H. Xu, J. Putschke, G. W. Hoffmann, Z. H. Khan, N. Yu, A. F. Kraishan, M. Zyzak, Sudip Chattopadhyay, P. Yepes, Patrick Huck, R. Stock, L. Kotchenda, S. K. Tripathy, Z. Chang, X.P. Zhang, P. Filip, R. L. Ray, I. Kulakov, N. Shah, D. P. Kikoła, B. Di Ruzza, A. A. Derevschikov, O. D. Tsai, G. Webb, Feng, R. Raniwala, P. K. Sahu, P. Sørensen, X. Huang, M. Calderón de la Barca Sánchez, L. Yi, N. K. Pruthi, K. D. Landry, Z. Sun, Anjishnu Sarkar, A. Hirsch, J. Porter, J. Pluta, F. J. M. Geurts, L. K. Kosarzewski, A. R. Timmins, K. Poniatowska, L. Zhou, B. Stringfellow, B. Mohanty, O. Rusnakova, M. Lomnitz, Y. Xu, J. L. Drachenberg, I. Sakrejda, G. Agakishiev, B. Srivastava, J. Deng, T. Tarnowsky, D. Solanki, S. B. Nurushev, S. N. Gupta, Y. Guo, R. Ma, O. Eyser, C. Dilks, A. Gupta, J.S. Wang, J. Sandweiss, S. Horvat, W. Christie, R. Bellwied, E. P. Sichtermann, S. Yang, L. Didenko, G. S. Averichev, J.H. Lee, M. Wada, H. S. Matis, D. J. Hofman, I. Kisel, D. Kalinkin, G. Contin, D. Keane, B. Pawlik, S. Margetis, S. Raniwala, D. Garand, Ł. Fulek, H. G. Ritter, H.J. Crawford, M. M. Mondal, Szelezniak, P. Bhattarai, S. Kabana, R. Witt, T. Ullrich, E. G. Judd, L. Song, Li-Ping He, Zhang Xiao, J. Engelage, J. C. Webb, S. A. Voloshin
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Le résumé fourni par la source
Author(s): Collaboration, STAR; Adamczyk, L; Adkins, JK; Agakishiev, G; Aggarwal, MM; Ahammed, Z; Alekseev, I; Aparin, A; Arkhipkin, D; Aschenauer, EC; Ashraf, MU; Attri, A; Averichev, GS; Bai, X; Bairathi, V; Bellwied, R; Bhasin, A; Bhati, AK; Bhattarai, P; Bielcik, J; Bielcikova, J; Bland, LC; Bordyuzhin, IG; Bouchet, J; Brandenburg, JD; Brandin, AV; Bunzarov, I; Butterworth, J; Caines, H; Sanchez, M Calderon de la Barca; Campbell, JM; Cebra, D; Chakaberia, I; Chaloupka, P; Chang, Z; Chatterjee, A; Chattopadhyay, S; Chen, X; Chen, JH; Cheng, J; Cherney, M; Christie, W; Contin, G; Crawford, HJ; Das, S; Silva, LC De; Debbe, RR; Dedovich, TG; Deng, J; Derevschikov, AA; Ruzza, B di; 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, A; Gupta, S | Abstract: We report the measurement of the leptonic ($e^{+}e^{-}$) decay channel of the $\phi$(1020) meson in Au+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV by the STAR experiment. The transverse momentum ($p_{\rm T}$) spectrum is measured for 0.1 $\le p_{\rm T} \le 2.5$ GeV/$c$ at mid-rapidity ($|y|\le1$). We obtain the $p_{\rm T}$-integrated $\phi$(1020) mass $M_{\phi}=1017.7\pm0.8 (\rm {stat.}) \pm0.9 (\rm {sys.})$ MeV/$c^{2}$ and width $\Gamma_{\phi} = 8.0\pm 2.5(\rm {stat.}) \pm 2.3(\rm {sys.}) \textrm{MeV/}c^{2}$, which are within 1.5\,$\sigma$ and 1.1\,$\sigma$ of the vacuum values, respectively. No significant difference is observed in the measured $p_{\rm T}$ spectrum, $dN/dy$, or $\left$ of the $\phi$(1020) meson between the $e^{+}e^{-}$ and hadronic ($K^{+}K^{-}$) decay channels as measured by the same experiment. The experimental results are compared to a theoretical model including medium-modified $\phi$(1020).
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Particle physics theoretical and experimental studiesHigh-Energy Particle Collisions Research