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Mea.urements of diha.ron correla.ions rela.ive to the event pla.e in a.+a. collisions a.√^(S)NN=200 GeV

Chinese Physics C 2021年第4期45卷 198-241页

作者： H.a.a.ishiev M.M.a.ga.wa. Z.a.a.med a.V.a.a.hverdya.ts I.a.ekseev J.a.ford B.D.a.derson C.D.a.son D.a.khipkin G.S.a.erichev J.Ba.ewski D.R.Bea.is N.K.Behera.R.Bellwied M.J.Beta.court R.R.Betts a.Bha.in a.K.Bha. H.Bichsel J.Bieleik J.Bielcikova.B.Biritz L.C.Bla.d W.Borowski J.Bouchet E.Bra.dot a.V.Bra.din a.Bridgema. S.G.Brovko E.Bruna.S.Bueltma.n I.Bunza.ov T.P.Burton X.Z.Ca. H.Ca.nes M.Ca.deron de la.Ba.ca.Sa.chez D.Cebra.R.Cendeja. M.C.Cerva.tes Z.Cha.ecki P.Cha.oupka.S.Cha.topa.hya. H.F.Chen J.H.Chen J.Y.Chen L.Chen J.Cheng M.Cherney a.Chika.ia. K.E.Choi W.Christie P.Chung M.J.M.Codrington R.Corliss J.G.Cra.er H.J.Cra.ford S.Da.h a.Da.ila.Leyva.L.C.De Silva. R.R.Debbe T.G.Dedovich a.a.Derevschikov R.Derra.i de Souza.L.Didenko P.Dja.otho S.M.Dogra.X.Dong J.L.Dra.henberg J.E.Dra.er J.C.Dunlop L.G Efimov M.Elnim J.Engela.e G Eppley M.Estienne L.Eun O.Evdokimov R.Fa.emi J.Fedorisin a.Feng R.G.Fersch P.Filip E.Finch V.Fine Y.Fisya. C.a.Ga.lia.di D.R.Ga.ga.ha.a. a.Geromitsos F.Geurts P.ghosh Y.N.Gorbunov a.Gordon O.Grebenyuk D.Grosnick S.M.Guertin a.Gupta.W.Guryn B.Ha.g O.Ha.kova.a.Ha.ed L-X.Ha. J.W.Ha.ris J.P.Ha.s-Wehle M.Heinz S.Heppelma.n a.Hirsch E.Hjort G.W.Hoffma.n D.J.Hofima. B.Hua.g H.Z.Hua.g T.J.Huma.ic L.Huo G.Igo P.Ja.obs W.W.Ja.obs C.Jena.F.Jin J.Joseph E.G.Judd S.Ka.a.a.K.Ka.g J.Ka.ita. K.Ka.der H.Ke D.Kea.e a.Kechechya. D.Kettler D.P.Kikola.J.Kiryluk a.Kisiel V.Kizka.a.G.Knospe D.D.Koetke T.Kollegger J.Konzer I.Kora.t L.Koroleva.W.Korsch L.Kotchenda.V.Kouchpil P.Kra.tsov K.Krueger M.Krus L.Kuma. P.Kurna.i M.a.C.La.ont J.M.La.dgra. S.La.ointe J.La.ret a.Lebedev R.Lednicky J.H.Lee W.Leight M.J.LeVine C.Lil L.Li N.Li W.Li X.Li X.Li Y.Li Z.M.Li M.a.Lisa.F.Liu H.Liu J.Liu T.Ljubicic W.J.Llope R.S.Longa.re W.a.Love Y.Lu E.V.Luka.hov X.Luo G.L.Ma.Y.G.Ma. D.P.Ma.a.a.ra.R.Ma.ka.O.I.Ma.l L.K.Ma.gotra.R.Ma.weiler S.Ma.getis C.Ma.kert H.Ma.ui H.S.Ma.is Yu.a.Ma.ulenko D.MeDona.d T.S.McSha.e a.Mescha.in R.Milner N.G.Mina.v S.Mioduszewski a.Mischke M.K.Mitrovski B.Moha.ty M.M.Monda. B.Morozov D.a.Morozov M.G.Munhoz M a.gonne Na.iona. La.ora.ory Argonnellinois 60439USA Brookha.en Na.iona. La.ora.ory UptonNew York 11973USA University of Ca.ifomia BerkeleyCaliformnia 94720USA University of Ca.ifornia DavisCalifornia 95616USA University of Ca.iformnia Los AngelesCalifomia 90095USA Universida.e Esta.ua. de Ca.pina. Sao PauloBrazil University of Illinois a. Chica.o ChicagoIlinois 60607USA Creighton University OmahaNebraska 68178USA Czech Technica. University in Pra.ue FNSPEPrague11519Czech Republic Nuclea. Physics Institute a. CR 25068 Rez/PragueCzech Republic University of Fra.kfurt FrankfurtGermany Institute of Physics Bhubaneswar 751005India India. Institute of Technology MumbaiIndia India.a.University BloomingtonIndiana 47408USA a.ikha.ov Instiute for Theoretica. a.d Experimenta. Physics MoscowRussia University of Ja.mu Jammu 180001India Joint Institute for Nuclea. Resea.ch Dubna141980Russia Kent Sta.e University KentOhio 44242USA University of Kentucky LexingtonKentucky40506-0055USA Institute of Modern Physics LanzhouChina La.rence Berkeley Na.iona. La.ora.ory BerkeleyCalifornia 94720USA Ma.sa.husetts Institute of Technology CambridgeMA 02139-4307USA Mx-Pla.ck-Institut fir Physik MunichGermany Michiga. Sta.e University East LansingMichigan 48824USA Moscow Engineering Physics Institute Moscow Russia NIKHEF a.d Utrecht University AmsterdamThe Netherlands Ohio Sta.e University ColumbusOhio 43210USA Old Dominion University NorfolkVA23529USA Pa.ja. University Chandigarh 160014India PennsyIva.ia.Sta.e University University ParkPennsylvania 16802USA Institute of High Energy Physics ProtvinoRussia Purdue University West LafayetteIndiana 47907USA Pusa. Na.iona. University PusanRepublic of Korea University of Ra.a.tha. Jaipur 302004India Rice University HoustonTexas 77251USA Universida.e de Sa. Pa.lo Sao PauloBrazil University of Science&Technology of China Hefei 230026.China Sha.dong University JinanShandong 250100China Sha.gha. Institute of a.plied Physics Shanghai 201800Chi

Diha.ron a.imutha. correla.ions conta.ning a.high tra.sverse momentum(pr)trigger pa.ticle a.e sensit-ive to the properties of the nuclea. medium crea.ed a. RHIC through the strong intera.tions occurring between the tra.ersing pa.ton a.d the medium,*** mea.urements revea.ed a.strong modifica.ion to di-ha.ron a.imutha. correla.ions in a.+a. collisions with respect to ptp a.d d+a. *** modifica.ion in-crea.es with the collision centra.ity,suggesting a.pa.h-length or energy density dependence to the je-quenching *** pa.er reports STa. mea.urements of diha.ron a.imutha. correla.ions in mid-centra.(20%-60%)a.+a. collisions a.√^(S)NN=200 GeV a. a.function of the trigger pa.ticle's a.imutha. a.gle rela.ive to the event pla.e,Ф_(s)=|Ф_(t)-ψ_(Ep)|.The a.imutha. correla.ion is studied a. a.function of both the trigger a.d a.socia.ed pa.ticle *** subtra.tions of the combina.oria. ba.kground a.d a.isotropic flow,a.suming Zero Yield a. Minimum(ZYa.),a.e *** correla.ion results a.e first discussed with subtra.tion of the even ha.monic(elliptic a.d qua.ra.gu-la.)flow *** a.a.-side correla.ion is strongly modifed,a.d the modifica.ion va.ies withФ_(s),with a.double-pea. structure for out-of-pla.e trigger *** nea.-side ridge(long ra.ge pseudo-ra.idity△_(η)correla.tion)a.pea.s to drop with increa.ingФ_(s)while the jet-like component rema.ns a.proxima.ely *** correla.tion functions a.e further studied with the subtra.tion of odd ha.monic tria.gula. flow ba.kground a.ising from *** is found tha. the tria.gula. flow,while responsible for the ma.ority of the a.plitudes,is not sufficient to expla.n theφs-dependence of the ridge or the a.a.-side double-pea. *** dropping ridge withФ_(s)could be a.tributed to a._(s)-dependent lliptie a.isotropy;however,the physics mecha.ism of the ridge rema.ns a. open *** with a._(s)-dependent elliptic flow,the a.a.-side correla.ion structure

关键词： rela.ivistic hea.y ion collisions diha.ron correla.ions jet-medium intera.tions a.isotropic flow ba.kground event pla.e

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