Measurement of cold nuclear matter effects for inclusive J/ψ in p+Au collisions at [formula omitted] GeV

M S Abdallah ,H Harrison,Z Ahammed,Z Tu,J Seger,A Jentsch,Z Wang,W Guryn,G Ponimatkin,D Kincses,S Mioduszewski,G Eppley,H Xu,N Shah,N Xu,Y Panebratsev,E Duckworth,X Ju,D Isenhower,X Chu,X Dong,M Robotkova,J Pan,G Agakishiev,N Smirnov,J Zhang,S Salur,Y Lin,Y Zhang,J Lauret,I Mooney,J Pluta,N Magdy,A Quintero,D Cebra,G Odyniec,J Adam,M Nie,N Chankova-Bunzarova,S Singha,Y Feng,C Li,R Seto,R Pak,Z Zhang,X Liu,M Stefaniak,X Chen,X Gou,D Grosnick,K Jiang,I Upsal,S Choudhury,X Zhu,H Qiu,B Xi,D Kapukchyan,I Alekseev,Y Liu,Y Ji,B Srivastava,N Herrmann,A Dhamija,S Margetis,L Di Carlo,W Li,C Racz,A Francisco,E Loyd,L Ruan,C Zhang,A Ewigleben,Y Sun,A Chatterjee,O Evdokimov,A Taranenko,K Kang,B Stringfellow,S Zhang,H Wieman,I Aggarwal,P Liu,D Roy,P Parfenov,A Hamed,D Tlusty,J Zhao,F Seck,M Csanád,J Cheng,W Xie,C Fu,I Vassiliev,P Filip,P Seyboth,H Liu,P Tribedy,P Bhagat,N Elsey,Y Liang,I Kisel,X Li,H Caines,F Videbæk,M Zyzak,Y Xu,A Mukherjee,A Kiselev,Y Yu,Z Liu,V Bairathi,T Liu,J Wu,N Raha,S He,S Chattopadhyay,A Kechechyan,W Solyst,W Baker,S Lan,T Niida,T Shao,T Ullrich,K Yip,N Schmitz,S Heppelmann,L Kochenda,T Nonaka,W Zha,A Bhasin,V Verkest,M Simko,J Putschke,L Yi,M Posik,M Strikhanov,S Fazio,C Kim,D Kalinkin,Y Fisyak,Z Chen,P Chaloupka,H Sako,S Trentalange,Z Ye,Y Huang,S Kagamaster,C Zhou,P Wang,M Shao,V Prozorova,B Pawlik,Z Tang,S Harabasz,F Wang,M Daugherity,I Chakaberia,S Esumi,M Kelsey,Z Chang,A Attri,B Kimelman,P Federic,A Behera,J Jia,K Gopal,S Kumar,X Liang,L Adamczyk,G Van Buren,D Zhang,G Xie,K Kauder,D Neff,C Perkins,B Mohanty,X Huang,T Truhlar,M Sergeeva,L Didenko,F Liu,G Wang,A Pandav,R Licenik,C Jena,E Finch,B Summa,Y Wang,L Holub,D Keane,R Sikora,A Lebedev,A Aparin,M Tokarev,D Chen,L Wen,Y Söhngen,D Mallick,B Surrow,G Nigmatkulov,W He,Y Yang,T Galatyuk,J Porter,G Igo,H Zbroszczyk,A Ogawa,K Nayak,P Sorensen,J Chen,Y Hu,Y Wu,T Tarnowsky,M Calderón De La Barca Sánchez,Y Li,P Dixit,L Pinsky,C Yang,J Sandweiss,Md Nasim,L Kumar,R Bellwied,A Gupta,R Fatemi,E Shahaliev,S Kabana,I Bunzarov,O Eyser,R Lacey,J Engelage,T Todoroki,M Chevalier,R Nishitani,A Gibson,C Markert,W Christie,E P Sichtermann ,W B Schmidke ,H S Ko ,Zhiguang Xiao ,Yi Fei Han ,P Szymański ,T D S Stanislaus ,S K Tripathy ,H J Crawford ,X Luo ,B R Schweid ,D B Nemes ,J C Dunlop ,M D Harasty ,J D Brandenburg ,Y H Leung ,R L Ray ,J S Wang ,Vitaly Okorokov ,A I Sheikh ,M Šumbera ,H G Ritter ,J R Adams ,N G Minaev ,J B Singh ,Raghav Kunnawalkam Elayavalli ,A K Sahoo ,Ł Fulek ,E G Judd ,A I Hamad ,M Żurek ,Yan-Qing Ma ,G D Westfall ,X P Zhang ,D Pawłowska ,H S Matis ,J L Drachenberg ,K N Barish ,Eric A Hoffman ,J Bielčíková ,E C Aschenauer ,Y V Khyzhniak ,B S Page ,M M Aggarwal ,A S Nunes ,S Vokál ,W J Llope ,H M Spinka ,J Fedorišin ,Lishuang Ma ,R S Longacre ,F G Atetalla ,A R Timmins ,H W Ke ,J L Romero ,X Cai ,J Rusňák ,J Bielčík ,J M Landgraf ,P C Weidenkaff ,F-H Chang ,W W Jacobs ,S A Voloshin ,B E Aboona ,N S Lukow ,D N Svirida ,Susumu Sato ,R L Pintér ,N Sahoo ,S K Radhakrishnan ,J M Nelson ,H Z Huang ,X M Sun ,L Kramárik ,J W Harris ,Д А Морозов ,R G Reed ,D G Underwood ,J Ball ,R Ma ,S L Yang ,L V Nogach ,A H Tang ,Z J Zhang ,P V Shanmuganathan ,D P Kikoła ,C A Gagliardi ,A A Derevschikov ,Yu Shi ,B K Chan ,C Feng ,J H Lee ,T H Lin ,T J Humanic ,B A Trzeciak ,R Lednický ,David J Stewart ,G S Averichev ,N K Pruthi ,A Vasiliev ,I G Bordyuzhin ,M M Mondal ,M U Ashraf ,S S Shi ,J H Kwasizur ,S Huang ,A A P Suaide ,B R Pokhrel ,S K Oh ,Tao Huang ,J H Thomas ,A G Knospe ,J Mazer ,S W Wissink ,J H Chen ,T G Dedovich ,F M Fawzi ,Nirmal Ghimire ,T Ljubičić ,O D Tsai ,Z W Sweger ,M L Kabir ,Zhihao Xu ,M Przybycień ,A V Brandin ,M I Nagy ,Q Shou ,O V Rogachevskiy ,J Vaněk ,C A Tomkiel ,Qiang Yang ,M A Lisa ,R E Tribble ,П Кравцов ,L K Kosarzewski ,M J Skoby ,D Y Shen ,I M Deppner ,D Anderson ,Yang He ,J D Nam ,J K Adkins ,Ashok Kumar Pandey ,F J M Geurts ,J C Webb ,X He ,Q Xu

doi:10.1016/j.physletb.2021.136865

Abstract

Measurement by the STAR experiment at RHIC of the cold nuclear matter (CNM) effects experienced by inclusive J/ψ at mid-rapidity in 0-100% p+Au collisions at sNN = 200 GeV is presented. Such effects are quantified utilizing the nuclear modification factor, RpAu, obtained by taking a ratio of J/ψ yield in p+Au collisions to that in p+p collisions scaled by the number of binary nucleon-nucleon collisions. The differential J/ψ yield in both p+p and p+Au collisions is measured through the dimuon decay channel, taking advantage of the trigger capability provided by the Muon Telescope Detector in the RHIC 2015 run. Consequently, the J/ψRpAu is derived within the transverse momentum (pT) range of 0 to 10 GeV/c. A suppression of approximately 30% is observed for pT<2 GeV/c, while J/ψRpAu becomes compatible with unity for pT greater than 3 GeV/c, indicating the J/ψ yield is minimally affected by the CNM effects at high pT. Comparison to a similar measurement from 0-20% central Au+Au collisions reveals that the observed strong J/ψ suppression above 3 GeV/c is mostly due to the hot medium effects, providing strong evidence for the formation of the quark-gluon plasma in these collisions. Several model calculations show qualitative agreement with the measured J/ψRpAu, while their agreement with the J/ψ yields in p+p and p+Au collisions is worse.

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