Measurement of away-side broadening with self-subtraction of flow in Au+Au collisions at \begin{document}$ {\sqrt{{\bf s}_{\bf{NN}}}}$\end{document} =200 GeV

J. Adam,L. Adamczyk,J. R. Adams,J. K. Adkins,G. Agakishiev,M. M. Aggarwal, Z. Ahammed,I. Alekseev,D. M. Anderson, R. Aoyama,A. Aparin,E. C. Aschenauer, M. U. Ashraf, F. Atetalla, A. Attri,G. S. Averichev,V. Bairathi,K. Barish,A. J. Bassill,A. Behera, R. Bellwied, A. Bhasin, A. K. Bhati, J. Bielcik, J. Bielcikova,L. C. Bland,I. G. Bordyuzhin,J. D. Brandenburg,A. V. Brandin,J. Bryslawskyj,I. Bunzarov,J. Butterworth, H. Caines,M. Calderón de la Barca Sánchez, D. Cebra, I. Chakaberia,P. Chaloupka, B. K. Chan,F-H. Chang, Z. Chang,N. Chankova-Bunzarova,A. Chatterjee,S. Chattopadhyay, J. H. Chen, X. Chen, J. Cheng,M. Cherney,W. Christie,H. J. Crawford, M. Csanád,S. Das,T. G. Dedovich,I. M. Deppner,A. A. Derevschikov,L. Didenko,C. Dilks, X. Dong,J. L. Drachenberg,J. C. Dunlop, T. Edmonds, N. Elsey,J. Engelage, G. Eppley,R. Esha,S. Esumi, O. Evdokimov, J. Ewigleben,O. Eyser, R. Fatemi,S. Fazio,P. Federic, J. Fedorisin,Y. Feng,P. Filip,E. Finch, Y. Fisyak,L. Fulek, C. A. Gagliardi,T. Galatyuk,F. Geurts,A. Gibson,K. Gopal, D. Grosnick,A. Gupta, W. Guryn,A. I. Hamad,A. Hamed, J. W. Harris,L. He, S. Heppelmann,N. Herrmann, L. Holub,Y. Hong,S. Horvat,B. Huang, H. Z. Huang,S. L. Huang,T. Huang,X. Huang,T. J. Humanic,P. Huo, G. Igo,W. W. Jacobs,C. Jena,A. Jentsch,Y. Ji, J. Jia,K. Jiang, S. Jowzaee,X. Ju,E. G. Judd, S. Kabana,S. Kagamaster,D. Kalinkin,K. Kang,D. Kapukchyan, K. Kauder,H. W. Ke,D. Keane,A. Kechechyan,M. Kelsey,Y. V. Khyzhniak,D. P. Kiko la,C. Kim,T. A. Kinghorn, I. Kisel,A. Kisiel,M. Kocan, L. Kochenda,L. K. Kosarzewski,L. Kramarik,P. Kravtsov, K. Krueger,N. Kulathunga Mudiyanselage,L. Kumar,R. Kunnawalkam Elayavalli,J. H. Kwasizur, R. Lacey,J. M. Landgraf, J. Lauret,A. Lebedev, R. Lednicky,J. H. Lee,C. Li,W. Li,X. Li,Y. Li,Y. Liang, R. Licenik,T. Lin, A. Lipiec,M. A. Lisa,F. Liu,H. Liu,P. Liu,T. Liu,X. Liu,Y. Liu,Z. Liu, T. Ljubicic,W. J. Llope, M. Lomnitz,R. S. Longacre,S. Luo,X. Luo,G. L. Ma,L. Ma,R. Ma,Y. G. Ma,N. Magdy, R. Majka, D. Mallick,S. Margetis, C. Markert,H. S. Matis,O. Matonoha,J. A. Mazer,K. Meehan, J. C. Mei, N. G. Minaev,S. Mioduszewski,D. Mishra, B. Mohanty,M. M. Mondal,I. Mooney, Z. Moravcova,D. A. Morozov,Md. Nasim,K. Nayak,J. M. Nelson,D. B. Nemes,M. Nie, G. Nigmatkulov,T. Niida,L. V. Nogach, T. Nonaka, G. Odyniec,A. Ogawa, S. Oh,V. A. Okorokov,B. S. Page, R. Pak,Y. Panebratsev,B. Pawlik, D. Pawlowska,H. Pei,C. Perkins,R. L. Pintér, J. Pluta,J. Porter,M. Posik,N. K. Pruthi, M. Przybycien,A. Quintero,S. K. Radhakrishnan,S. Ramachandran, R. L. Ray,R. Reed, H. G. Ritter,J. B. Roberts,O. V. Rogachevskiy,J. L. Romero,L. Ruan,J. Rusnak,O. Rusnakova,N. R. Sahoo,P. K. Sahu, S. Salur,J. Sandweiss, J. Schambach,W. B. Schmidke,N. Schmitz,B. R. Schweid,F. Seck, J. Seger, M. Sergeeva,R. Seto, P. Seyboth,N. Shah, E. Shahaliev,P. V. Shanmuganathan,M. Shao, F. Shen,W. Q. Shen,S. S. Shi,Q. Y. Shou,E. P. Sichtermann, S. Siejka,R. Sikora,M. Simko,J. Singh,S. Singha,D. Smirnov,N. Smirnov,W. Solyst,P. Sorensen,H. M. Spinka,B. Srivastava,T. D. S. Stanislaus, M. Stefaniak,D. J. Stewart,M. Strikhanov,B. Stringfellow, A. A. P. Suaide,T. Sugiura, M. Sumbera,B. Summa,X. M. Sun,Y. Sun, B. Surrow,D. N. Svirida, P. Szymanski,A. H. Tang,Z. Tang,A. Taranenko,T. Tarnowsky, A. Tawfik, J. H. Thomas,A. R. Timmins,D. Tlusty,T. Todoroki,M. Tokarev,C. A. Tomkiel,S. Trentalange,R. E. Tribble,P. Tribedy,S. K. Tripathy,O. D. Tsai,B. Tu,Z. Tu,T. Ullrich,D. G. Underwood,I. Upsal,G. Van Buren,J. Vanek,A. N. Vasiliev,I. Vassiliev,F. Videbæk,S. Vokal,S. A. Voloshin,F. Wang,G. Wang,P. Wang,Y. Wang, J. C. Webb, L. Wen,G. D. Westfall, H. Wieman,S. W. Wissink, R. Witt,Y. Wu,Z. G. Xiao,G. Xie, W. Xie,H. Xu,N. Xu,Q. H. Xu,Y. F. Xu,Z. Xu, C. Yang,Q. Yang,S. Yang,Y. Yang,Z. Yang, Z. Ye, L. Yi,K. Yip, H. Zbroszczyk, W. Zha,D. Zhang,L. Zhang,S. Zhang,X. P. Zhang,Y. Zhang,Z. Zhang, J. Zhao,C. Zhong,C. Zhou, X. Zhu, Z. Zhu,M. Zurek, M. Zyzak

Chinese Physics C（2020）

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摘要

High transverse momentum ( \\begin{document}$ p_T $\\end{document} ) particle production is suppressed due to parton (jet) energy loss in the hot dense medium created in relativistic heavy-ion collisions. Redistribution of energy at low-to-modest \\begin{document}$ p_T $\\end{document} has been elusive to measure because of large anisotropic backgrounds. We report a data-driven method for background evaluation and subtraction, exploiting the away-side pseudorapidity gaps, to measure the jetlike correlation shape in Au+Au collisions at \\begin{document}$ \\sqrt{s_{\\rm{NN}}} = 200 $\\end{document} GeV with the STAR experiment. The correlation shapes, for trigger particle \\begin{document}$ p_T\u003e3\\;{\\rm{GeV}}/c $\\end{document} and various associated particle \\begin{document}$ p_T $\\end{document} ranges within \\begin{document}$ 0.5 , are consistent with Gaussians and their widths are found to increase with centrality. The results indicate jet broadening in the medium created in central heavy-ion collisions.

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