Measurement of away-side broadening with self-subtraction of flow in Au+Au collisions at √sNN=200 GeV  

作　　者：L.Adamczyk J.R.Adams J.K.Adkins G.Agakishiev M.M.Aggarwal Z.Ahammed I.Alekseev D.M.Anderson A.Aparin E.C.Aschenauer M.U.Ashraf F.G.Atetalla A.Attri G.S.Averichev V.Bairathi K.Barish A.Behera R.Bellwied A.Bhasin J.Bielcik J.Bielcikova L.C.Bland I.G.Bordyuzhin J.D.Brandenburg A.V.Brandin 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 D.Chen J.H.Chen X.Chen Z.Chen J.Cheng M.Cherney M.Chevalier S.Choudhury W.Christie X.Chu H.J.Crawford M.Csanád M.Daugherity T.G.Dedovich I.M.Deppner A.A.Derevschikov L.Didenko X.Dong J.L.Drachenberg J.C.Dunlop T.Edmonds N.Elsey J.Engelage G.Eppley S.Esumi O.Evdokimov A.Ewigleben O.Eyser R.Fatemi S.Fazio P.Federic J.Fedorisin C.J.Feng Y.Feng P.Filip E.Finch Y.Fisyak A.Francisco L.Fulek C.A.Gagliardi T.Galatyuk F.Geurts A.Gibson K.Gopal D.Grosnick W.Guryn A.I.Hamad A.Hamed S.Harabasz J.W.Harris S.He W.He X.H.He S.Heppelmann S.Heppelmann N.Herrmann E.Hoffman L.Holub Y.Hong S.Horvat Y.Hu H.Z.Huang S.L.Huang T.Huang X.Huang T.J.Humanic P.Huo G.Igo D.Isenhower W.W.Jacobs C.Jena A.Jentsch Y.JI J.Jia K.Jiang S.Jowzaee X.Ju E.G.Judd S.Kabana M.L.Kabir S.Kagamaster D.Kalinkin K.Kang D.Kapukchyan K.Kauder H.W.Ke D.Keane A.Kechechyan M.Kelsey Y.V.Khyzhniak D.P.Kikoła C.Kim B.Kimelman D.Kincses T.A.Kinghorn I.Kisel A.Kiselev M.Kocan L.Kochenda L.K.Kosarzewski L.Kramarik P.Kravtsov K.Krueger N.Kulathunga Mudiyanselage L.Kumar S.Kumar R.Kunnawalkam Elayavalli J. 

机构地区：[1]Abilene Christian University,Abilene,Texas 79699 [2]AGH University of Science and Technology,FPACS,Cracow 30-059,Poland [3]Alikhanov Institute for Theoretical and Experimental Physics NRC"Kurchatov Institute",Moscow 117218,Russia [4]Argonne National Laboratory,Argonne,Illinois 60439 [5]American University of Cairo,New Cairo 11835,New Cairo,Egypt [6]Brookhaven National Laboratory,Upton,New York 11973 [7]University of California,Berkeley,California 94720 [8]University of California,Davis,California 95616 [9]University of California,Los Angeles,California 90095 [10]University of California,Riverside,California 92521 [11]Central China Normal University,Wuhan,Hubei 430079 [12]University of Illinois at Chicago,Chicago,Illinois 60607 [13]Creighton University,Omaha,Nebraska 68178 [14]Czech Technical University in Prague,FNSPE,Prague 11519,Czech Republic [15]Technische Universität Darmstadt,Darmstadt 64289,Germany [16]ELTE Eötvös Loránd University,Budapest,Hungary H-1117 [17]Frankfurt Institute for Advanced Studies FIAS,Frankfurt 60438,Germany [18]Fudan University,Shanghai 200433 [19]University of Heidelberg,Heidelberg 69120,Germany [20]University of Houston,Houston,Texas 77204 [21]Huzhou University,Huzhou,Zhejiang 313000 [22]Indian Institute of Science Education and Research(IISER),Berhampur 760010,India [23]Indian Institute of Science Education and Research(IISER)Tirupati,Tirupati 517507,India [24]Indian Institute Technology,Patna,Bihar 801106,India [25]Indiana University,Bloomington,Indiana 47408 [26]Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou,Gansu 730000 [27]University of Jammu,Jammu 180001,India [28]Joint Institute for Nuclear Research,Dubna 141980,Russia [29]Kent State University,Kent,Ohio 44242 [30]University of Kentucky,Lexington,Kentucky 40506-0055 [31]Lawrence Berkeley National Laboratory,Berkeley,California 94720 [32]Lehigh University,Bethlehem,Pennsylvania 18015 [33]Max-Planck-Institut für Physik,Munich 80805,Germany [34]Michigan State University,East Lansing,Michigan 48824 [35]Nat

出　　处：《Chinese Physics C》2020年第10期59-67,共9页中国物理C（英文版）

摘　　要：High transverse momentum(pT)particle production is suppressed owing to the parton(jet)energy loss in the hot dense medium created in relativistic heavy-ion collisions.Redistribution of energy at low-to-modest pT has been difficult to measure,owing to 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 √sNN=200 GeV in the STAR experiment.The correlation shapes,for trigger particles pT>3GeV/c and various associated particle pT ranges within 0.5<pT<10GeV/c,are consistent with Gaussians,and their widths increase with centrality.The results indicate jet broadening in the medium created in central heavy-ion collisions.

关 键 词：di-hadron correlations jet HEAVY-ION 

分 类 号：O572.214[理学—粒子物理与原子核物理]