/ nucl-ex arXiv:1707.01988


Beam Energy Dependence of Jet-Quenching Effects in Au+Au Collisions at $\sqrt{s_{_{ \mathrm{NN}}}}$ = 7.7, 11.5, 14.5, 19.6, 27, 39, and 62.4 GeV


Adamczyk, L. (AGH-UST, Cracow) ; Adams, J.R. (Alabama U., Huntsville) ; Adkins, J.K. (Kentucky U.) ; Agakishiev, G. (Dubna, JINR) ; Aggarwal, M.M. (Panjab U.) ; Ahammed, Z. (Calcutta, VECC) ; Ajitanand, N.N. (SUNY, Stony Brook, Chem. Dept.) ; Alekseev, I. (Moscow, ITEP) ; Anderson, D.M. (Texas A-M) ; Aoyama, R. (Tsukuba U.) ; Aparin, A. (Dubna, JINR) ; Arkhipkin, D. (Brookhaven) ; Aschenauer, E.C. (Brookhaven) ; Ashraf, M.U. (Tsinghua U., Beijing) ; Attri, A. (Panjab U.) ; Averichev, G.S. (Dubna, JINR) ; Bai, X. (South Dakota Sch. Mines Tech.) ; Bairathi, V. (Rajasthan U.) ; Barish, K. (UC, Riverside) ; Behera, A. (SUNY, Stony Brook) ; Bellwied, R. (Houston U.) ; Bhasin, A. (Jammu U.) ; Bhati, A.K. (Panjab U.) ; Bhattarai, P. (Texas U.) ; Bielcik, J. (Prague, Tech. U.) ; Bielcikova, J. (Heidelberg, Max Planck Inst.) ; Bland, L.C. (Brookhaven) ; Bordyuzhin, I.G. (Moscow, ITEP) ; Bouchet, J. (Kent State U.) ; Brandenburg, J.D. (Rice U.) ; Brandin, A.V. (Moscow Phys. Eng. Inst.) ; Brown, D. (Syracuse U.) ; Bryslawskyj, J. (Baruch Coll.) ; Bunzarov, I. (Dubna, JINR) ; Butterworth, J. (Oxford U.) ; Caines, H. (Yale U.) ; Sánchez, M. Calderón de la Barca (UC, Davis) ; Campbell, J.M. (Ohio State U.) ; Cebra, D. (LBNL, NSD) ; Chakaberia, I. (Kansas State U.) ; Chaloupka, P. (Rez, Nucl. Phys. Inst.) ; Chang, Z. (Texas A-M) ; Chankova-Bunzarova, N. (Dubna, JINR) ; Chatterjee, A. (Saha Inst.) ; Chattopadhyay, S. (Calcutta, VECC) ; Chen, J.H. (SINAP, Shanghai) ; Chen, X. (Potsdam U.) ; Cheng, J. (Shandong U.) ; Cherney, M. (SUBATECH, Nantes) ; Christie, W. (Brookhaven) ; Contin, G. (Trieste U.) ; Crawford, H.J. (LBL, Berkeley) ; Das, S. (Karnatak U.) ; Dedovich, T.G. (Dubna JINR) ; Deng, J. (Shandong U.) ; Derevschikov, A.A. (Serpukhov, IHEP) ; Didenko, L. (Brookhaven) ; Dilks, C. (Penn State U.) ; Dong, X. (Princeton, Inst. Advanced Study) ; Drachenberg, J.L. (Valparaiso U.) ; Draper, J.E. (UC, Davis) ; Dunlop, J.C. (Brookhaven) ; Efimov, L.G. (Dubna, JINR) ; Elsey, N. (Wayne State U.) ; Engelage, J. (UC, Berkeley) ; Eppley, G. (Rice U.) ; Esha, R. (UCLA) ; Esumi, S. (Tsukuba U.) ; Evdokimov, O. (Illinois U., Chicago) ; Ewigleben, J. (Lehigh U.) ; Eyser, O. (Brookhaven) ; Fatemi, R. (Kentucky U.) ; Fazio, S. (Brookhaven) ; Federic, P. (Comenius U.) ; Federicova, P. (Prague, Tech. U.) ; Fedorisin, J. (Kosice, IEF) ; Feng, Z. (Hua-Zhong Normal U.) ; Filip, P. (Bratislava, Inst. Phys.) ; Finch, E. (Yale U.) ; Fisyak, Y. (Brookhaven) ; Flores, C.E. (UC, Davis) ; Fujita, J. (Creighton U.) ; Fulek, L. (AGH-UST, Cracow) ; Gagliardi, C.A. (Texas A-M) ; Geurts, F. (Rice U.) ; Gibson, A. (LBL, Berkeley) ; Girard, M. (Warsaw U. of Tech.) ; Grosnick, D. (Valparaiso U., Indiana) ; Gunarathne, D.S. (Temple U.) ; Guo, Y. (Beijing, Inst. High Energy Phys.) ; Gupta, A. (IUCAA, Pune) ; Guryn, W. (Brookhaven) ; Hamad, A.I. (Kent State U.) ; Hamed, A. (Texas A-M) ; Harlenderova, A. (Prague, Tech. U.) ; Harris, J.W. (Yale U.) ; He, L. (Purdue U.) ; Heppelmann, S. (Penn State U.) ; Hirsch, A. (Purdue U.) ; Horvat, S. (Munich, Max Planck Inst.) ; Huang, X. (Beijing, Inst. High Energy Phys.) ; Huang, B. (Illinois U., Chicago) ; Huang, T. (Texas A-M) ; Huang, H.Z. (UCLA) ; Humanic, T.J. (Ohio State U.) ; Huo, P. (SUNY, Stony Brook) ; Igo, G. (UCLA) ; Jacobs, W.W. (Indiana U.) ; Jentsch, A. (Texas U.) ; Jia, J. (SUNY, Stony Brook, Chem. Dept.) ; Jiang, K. (Hefei, CUST) ; Jowzaee, S. (Wayne State U.) ; Judd, E.G. (LBL, Berkeley) ; Kabana, S. (SUBATECH, Nantes) ; Kalinkin, D. (Indiana U.) ; Kang, K. (Tsinghua U., Beijing) ; Kapukchyan, D. (UC, Riverside) ; Kauder, K. (Illinois U., Chicago) ; Ke, H.W. (Brookhaven) ; Keane, D. (Kent State U.) ; Kechechyan, A. (Dubna, JINR) ; Khan, Z. (Bhat, Inst. Plasma Res.) ; Kikoła, D.P. (Warsaw U. of Tech.) ; Kim, C. (Korea U.) ; Kisel, I. (Frankfurt U., FIAS) ; Kisiel, A. (Warsaw U. of Tech.) ; Kochenda, L. (St. Petersburg, INP) ; Kocmanek, M. (Charles U.) ; Kollegger, T. (Darmstadt, EMMI) ; Kosarzewski, L.K. (Warsaw U. of Tech.) ; Kraishan, A.F. (Temple U.) ; Krauth, L. ; Kravtsov, P. (Moscow Phys. Eng. Inst.) ; Krueger, K. (DESY) ; Kulathunga, N. (Houston U.) ; Kumar, L. (Panjab U.) ; Kvapil, J. (Prague, Tech. U.) ; Kwasizur, J.H. (Indiana U.) ; Lacey, R. (SUNY, Stony Brook, Chem. Dept.) ; Landgraf, J.M. (Brookhaven) ; Landry, K.D. (UCLA) ; Lauret, J. (Brookhaven) ; Lebedev, A. (Moscow, ITEP) ; Lednicky, R. (Prague, Inst. Phys.) ; Lee, J.H. (MIT) ; Li, W. (Rice U.) ; Li, C. (Uppsala U.) ; Li, Y. (Orsay, LAL) ; Li, X. (Princeton U.) ; Lidrych, J. (Prague, Tech. U.) ; Lin, T. (Massachusetts U., Amherst) ; Lisa, M.A. (Ohio State U.) ; Liu, H. (Beijing, Inst. High Energy Phys.) ; Liu, P. (SUNY, Stony Brook) ; Liu, Y. (Purple Mountain Observ.) ; Liu, F. (Hua-Zhong Normal U.) ; Ljubicic, T. (Brookhaven) ; Llope, W.J. (Wayne State U.) ; Lomnitz, M. (Kent State U.) ; Longacre, R.S. (Brookhaven) ; Luo, X. (UCLA) ; Luo, S. (Illinois U., Chicago) ; Ma, Y.G. (SINAP, Shanghai) ; Ma, L. (SINAP, Shanghai) ; Ma, G.L. (SINAP, Shanghai) ; Ma, R. (Yale U.) ; Magdy, N. (SUNY, Stony Brook, Chem. Dept.) ; Majka, R. (Yale U.) ; Mallick, D. (HBNI, Mumbai) ; Margetis, S. (Kent State U.) ; Markert, C. (Texas U.) ; Matis, H.S. (LBL, Berkeley) ; Meehan, K. (UC, Davis) ; Mei, J.C. (Shandong U.) ; Miller, Z.W. (Illinois U., Chicago) ; Minaev, N.G. (Serpukhov, IHEP) ; Mioduszewski, S. (Brookhaven) ; Mishra, D. (Bhubaneswar, Inst. Phys.) ; Mizuno, S. (Nishina Ctr., RIKEN) ; Mohanty, B. (Jatni, NISER) ; Mondal, M.M. (Calcutta, VECC) ; Morozov, D.A. (Serpukhov, IHEP) ; Mustafa, M.K. (LBL, Berkeley) ; Nasim, Md. (Bhubaneswar, NISER) ; Nayak, T.K. (Calcutta, VECC) ; Nelson, J.M. (SLAC) ; Nie, M. (SINAP, Shanghai) ; Nigmatkulov, G. (Moscow Phys. Eng. Inst.) ; Niida, T. (KEK, Tsukuba) ; Nogach, L.V. (Serpukhov, IHEP) ; Nonaka, T. (Tokyo U., ICRR) ; Nurushev, S.B. (Serpukhov, IHEP) ; Odyniec, G. (LBL, Berkeley) ; Ogawa, A. (Brookhaven) ; Oh, K. (Pusan Natl. U.) ; Okorokov, V.A. (Moscow Phys. Eng. Inst.) ; Olvitt, D. (Temple U.) ; Page, B.S. (Michigan State U.) ; Pak, R. (Brookhaven) ; Pandit, Y. (Kent State U.) ; Panebratsev, Y. (Dubna, JINR) ; Pawlik, B. (Cracow, INP) ; Pei, H. (Hua-Zhong Normal U., LQLP) ; Perkins, C. (UC, Berkeley) ; Pluta, J. (Warsaw U. of Tech.) ; Poniatowska, K. (Warsaw U. of Tech.) ; Porter, J. (LBL, Berkeley) ; Posik, M. (Temple U.) ; Pruthi, N.K. (Panjab U.) ; Przybycien, M. (AGH-UST, Cracow) ; Putschke, J. (LBL, Berkeley) ; Quintero, A. (Kent State U.) ; Ramachandran, S. (UCLA) ; Ray, R.L. (Texas U.) ; Reed, R. (Witwatersrand U.) ; Rehbein, M.J. (Creighton U.) ; Ritter, H.G. (LBNL, Berkeley) ; Roberts, J.B. (Rice U.) ; Rogachevskiy, O.V. (Dubna, JINR) ; Romero, J.L. (UC, Davis) ; Roth, J.D. (Creighton U.) ; Ruan, L. (Brookhaven) ; Rusnak, J. (Prague, Inst. Phys.) ; Rusnakova, O. (Prague, Tech. U.) ; Sahoo, N.R. (Texas A-M) ; Sahu, P.K. (Bhubaneswar, Inst. Phys.) ; Salur, S. (Rutgers U., Piscataway) ; Sandweiss, J. (Yale U.) ; Sangaline, E. (UC, Davis) ; Saur, M. (Charles U.) ; Schambach, J. (U. Texas, Austin (main)) ; Schmah, A.M. (LBL, Berkeley) ; Schmidke, W.B. (Nevis Labs, Columbia U.) ; Schmitz, N. (Munich, Max Planck Inst.) ; Schweid, B.R. (SUNY, Stony Brook) ; Seger, J. (Creighton U.) ; Sergeeva, M. (UCLA) ; Seto, R. (UC, Riverside) ; Seyboth, P. (Jan Kochanowski U.) ; Shah, N. (SINAP, Shanghai) ; Shahaliev, E. (Dubna, JINR) ; Shanmuganathan, P.V. (Kent State U.) ; Shao, M. (Hefei, CUST) ; Shen, W.Q. (SINAP, Shanghai) ; Shi, Z. (Peking U., Beijing) ; Shi, S.S. (Hua-Zhong Normal U.) ; Shou, Q.Y. (Hua-Zhong Normal U., LQLP) ; Sichtermann, E.P. (LBL, Berkeley) ; Sikora, R. (AGH-UST, Cracow) ; Simko, M. (Rez, Nucl. Phys. Inst.) ; Singha, S. (Calcutta, VECC) ; Skoby, M.J. (Michigan U.) ; Smirnov, D. (Notre Dame U.) ; Smirnov, N. (Yale U.) ; Solyst, W. (Indiana U.) ; Sorensen, P. (LBL, Berkeley) ; Spinka, H.M. (Argonne) ; Srivastava, B. (Purdue U.) ; Stanislaus, T.D.S. (Valparaiso U., Indiana) ; Strikhanov, M. (Moscow Phys. Eng. Inst.) ; Stringfellow, B. (Purdue U.) ; Suaide, A.A.P. (Sao Paulo U.) ; Sugiura, T. (Tsukuba U.) ; Sumbera, M. (Rez, Nucl. Phys. Inst.) ; Summa, B. (Penn State U.) ; Sun, Y. (Hawaii U.) ; Sun, X. (Hua-Zhong Normal U.) ; Sun, X.M. (LBNL, Berkeley) ; Surrow, B. (MIT) ; Svirida, D.N. (Moscow, ITEP) ; Tang, Z. (Los Alamos) ; Tang, A.H. (Brookhaven) ; Taranenko, A. (SUNY, Stony Brook) ; Tarnowsky, T. (Purdue U.) ; Tawfik, A. (WLCAPP, Cairo) ; Thäder, J. (LBL, Berkeley) ; Thomas, J.H. (University Coll. London) ; Timmins, A.R. (Houston U.) ; Tlusty, D. (Prague, Tech. U.) ; Todoroki, T. (Nishina Ctr., RIKEN) ; Tokarev, M. (Dubna, JINR) ; Trentalange, S. (UCLA) ; Tribble, R.E. (Texas A-M) ; Tribedy, P. (Calcutta, VECC) ; Tripathy, S.K. (Bhubaneswar, Inst. Phys.) ; Trzeciak, B.A. (Utrecht U.) ; Tsai, O.D. (UCLA) ; Ullrich, T. (Brookhaven) ; Underwood, D.G. (Argonne) ; Upsal, I. (Ohio State U.) ; Van Buren, G. (Brookhaven) ; van Nieuwenhuizen, G. (Brookhaven) ; Vasiliev, A.N. (Serpukhov, IHEP) ; Videbæk, F. (Brookhaven) ; Vokal, S. (Dubna, JINR) ; Voloshin, S.A. (LBL, Berkeley) ; Vossen, A. (Indiana U.) ; Wang, Y. (UCLA) ; Wang, G. (INFN, Florence) ; Wang, F. (Purdue U.) ; Webb, G. (Kentucky U.) ; Webb, J.C. (Valparaiso U., Indiana) ; Wen, L. (Western Australia U.) ; Westfall, G.D. (Michigan State U.) ; Wieman, H. (LBNL, Berkeley) ; Wissink, S.W. (Indiana U.) ; Witt, R. (Naval Academy, Annapolis) ; Wu, Y. (CERN) ; Xiao, Z.G. (Tsinghua U., Beijing) ; Xie, W. (RIKEN BNL) ; Xie, G. (Hefei, CUST) ; Xu, Q.H. (KEK, Tsukuba) ; Xu, N. (LBL, Berkeley) ; Xu, Z. (Tsinghua U., Beijing) ; Xu, J. (Princeton U.) ; Xu, Y.F. (SINAP, Shanghai) ; Yang, Q. (Hefei, CUST) ; Yang, C. (Beijing, Inst. High Energy Phys.) ; Yang, Y. (Zurich U.) ; Yang, S. (Cincinnati U.) ; Ye, Z. (Houston U.) ; Yi, L. (Yale U.) ; Yip, K. (Brookhaven) ; Yoo, I. -K. (Pusan Natl. U.) ; Yu, N. (Caltech, JPL) ; Zbroszczyk, H. (Warsaw U. of Tech.) ; Zha, W. (Hefei, CUST) ; Zhang, J.B. (Hefei, CUST) ; Zhang, S. (MIT, MKI) ; Zhang, J. (Beijing, Inst. High Energy Phys.) ; Zhang, Z. (Rutherford) ; Zhang, Y. (Tsinghua U., Beijing, Dept. Eng. Phys.) ; Zhang, X.P. (LBL, Berkeley) ; Zhao, J. (Beihang U.) ; Zhong, C. (SINAP, Shanghai) ; Zhou, C. (Duke U.) ; Zhou, L. (Beijing, Inst. High Energy Phys.) ; Zhu, X. (Hua-Zhong Normal U.) ; Zhu, Z. (Beijing, Inst. High Energy Phys.) ; Zyzak, M. (Frankfurt U., FIAS)

Pages: 8

Abstract: We report measurements of the nuclear modification factor, $R_{ \mathrm{CP}}$, for charged hadrons as well as identified $\pi^{+(-)}$, $K^{+(-)}$, and $p(\overline{p})$ for Au+Au collision energies of $\sqrt{s_{_{ \mathrm{NN}}}}$ = 7.7, 11.5, 14.5, 19.6, 27, 39, and 62.4 GeV. We observe a clear high-$p_{\mathrm{T}}$ net suppression in central collisions at 62.4 GeV for charged hadrons which evolves smoothly to a large net enhancement at lower energies. This trend is driven by the evolution of the pion spectra, but is also very similar for the kaon spectra. While the magnitude of the proton $R_{ \mathrm{CP}}$ at high $p_{\mathrm{T}}$ does depend on collision energy, neither the proton nor the anti-proton $R_{ \mathrm{CP}}$ at high $p_{\mathrm{T}}$ exhibit net suppression at any energy. A study of how the binary collision scaled high-$p_{\mathrm{T}}$ yield evolves with centrality reveals a non-monotonic shape that is consistent with the idea that jet-quenching is increasing faster than the combined phenomena that lead to enhancement.

Web-Page: http://inspirehep.net/record/1609067/files/y3.png; http://inspirehep.net/record/1609067/files/Rcp_h_modified.png; http://inspirehep.net/record/1609067/files/Rcp_shared_axes_top_and_bottom3.png; http://inspirehep.net/record/1609067/files/arXiv:1707.01988.pdf


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