Near-side azimuthal and pseudorapidity correlations using neutral strange baryons and mesons ind+Au, Cu + Cu, and Au + Au collisions atsNN=200GeV

B I Abelev ,N Schmitz,S K Tripathy,W Guryn,B S Page,G Eppley,A Quintero,A Hamed,K Oh,Z Ye,N G Minaev,S Yang,J C Dunlop,T J Humanic,S Das,G Van Nieuwenhuizen,H J Crawford,S Heppelmann,D Mcdonald,Z Feng,J B Zhang,O Rusnakova,M Posik,R P Scharenberg,E G Judd,L Wen,W Zha,G Webb,K Poniatowska,G Nigmatkulov,I Chakaberia,L Didenko,A Ogawa,Y Zoulkarneeva,A Aparin,S Mckinzie,D Arkhipkin,W Solyst,C Li,J D Brandenburg,X Zhu,B Surrow,H Wieman,Y Li,S S Shi,S Fazio,T Todoroki,M Cherney,G Agakishiev,T Ullrich,J Pluta,Z H Khan,J H Lee,G S Averichev,J M Landgraf,J E Draper,T Niida,P Federic,A Gupta,P Seyboth,A Attri,A Lebedev,S Trentalange,B Mohanty,J S Wang,D Grosnick,N Shah,J C Mei,L S Barnby,S Horvat,P Pile,G W Hoffmann,A Manion,L Kochenda,L C De Silva,J K Adkins,B Stringfellow,K D Landry,M Simko,R Ma,Y Guo,Q Yang,C A Gagliardi,H Z Huang,A Vossen,P Huck,A Tawfik,D D Koetke,S Chattopadhyay,A A Derevschikov,V Bairathi,E Shahaliev,M Bombara,J Sandweiss,P V Shanmuganathan,J H Thomas,J W Harris,B Summa,S Kabana,H Qiu,K Jiang,R Haque,F Liu,O V Rogachevskiy,G Odyniec,W Christie,W Q Shen,I G Bordyuzhin,B Di Ruzza,G Igo,I Bunzarov,M K Mustafa,D Cebra,B Pawlik,S Ramachandran,H S Matis,L V Nogach,N K Pruthi,P K Sahu,W W Jacobs,R E Tribble,D S Gunarathne,J Seger,S Y Noh,S Luo,R L Ray,W Xie,J Schambach,G Contin,G Xie,P Tribedy,M Strikhanov,W B Schmidke,K Kauder,J Engelage,A R Timmins,D Garand,Z W Miller,M Shao,J Zhao,H W Ke,X Huang,J Lauret,A I Hamad,X Li,Y Fisyak,J Bouchet,J L Romero,R Fatemi,D Keane,D P Kikoła,L K Kosarzewski,Md Nasim,F Videbæk,M Vandenbroucke,K Krueger,J L Drachenberg,A M Poskanzer,M Tokarev,J Putschke,K Kang,R S Longacre,D Tlusty,S A Voloshin,M Lomnitz,D N Svirida,Y Panebratsev,E C Aschenauer,Z Chang,Y Zhang,O Eyser,P Bhattarai,L C Bland,L Gaillard,P Filip,P Chaloupka,D G Underwood,S Mioduszewski,R Pak,K Xin,H Caines,R Stock,A K Bhati,X Dong,W Li,C M Du,Y Pandit,R Esha,C Yang,S Singha,B Huang,L He,A Gibson,I Sakrejda,S B Nurushev,N Xu,A V Brandin,G Van Buren,N Magdy,T G Dedovich,A F Kraishan,R Witt,M M Mondal,O D Tsai,C Dilks,E P Sichtermann,L Ruan,K Meehan,Z Ahammed,J Thäder,N Yu,P Sorensen,S Gupta,H G Ritter,D Smirnov,M A Lisa,M J Skoby,G Wang,L E Dunkelberger,J Cheng,T K Nayak,G D Westfall,D Kalinkin,T D S Stanislaus,K Yip,L G Efimov,A H Tang,A Kechechyan,S Margetis,J Porter,R Varma,S W Wissink,T Huang,W J Llope,C Perkins,T Tarnowsky,J Deng,M Stepanov,Xiao Zhang ,A Sarkar,Z Xu,O Evdokimov,F J M Geurts ,Jun Xu ,J Bielčíková ,Yi Yang ,J M Campbell,J Butterworth,B K Nandi,X Chen,J Jia,R Lednický ,Xiaozhi Bai ,L Yi,Y Wang,I K Yoo ,D Olvitt,J Roberts ,П Кравцов ,I Alekseev,R Bellwied,X Luo,Y Xu ,L Song,H J Jang ,A Vasiliev ,H Pei,Y X Pan,Y J Sun ,Meenakshi Sharma ,Z J Sun ,F Wang,M Calderón De La Barca Sánchez,Long Zhou ,X M Sun,G L ,B Srivastava,I Kisel,J Fedorišin ,M Zyzak,J C Webb,H S Xu ,P G Jones,Zhong Chen ,X P Zhang,T Lin,J Zhang,S Salur,A Chatterjee,M Šumbera ,S Zhang,L Adamczyk,C Nattrass,M U Ashraf,Q Shou ,Z Tang,B Sharma,V Okorokov ,H Zbroszczyk,A Jentsch,Ł Fulek ,A Sharma,R Debbe ,I Upsal,T Ljubičić ,Martin Girard ,R Sikora,Z Shi,C Markert,M A.c Lamont ,A Bhasin,H Spinka ,H Wang,R Majka,J Novák ,A Hirsch,L Greiner,J Bielčík ,A Schmah ,J H Chen,Y Wu,Д А Морозов ,J Rusňák ,R Vértesi ,C Flores ,L Ma,M M Aggarwal,N Smirnov,D Mishra,Z Zhang,Q H Xu,Y G ,N Sahoo ,L Kumar,S Vokál ,A Kisiel

doi:10.1103/physrevc.94.014910

Abstract

We present measurements of the near-side of triggered di-hadron correlations using neutral strange baryons ($\Lambda$, $\bar{\Lambda}$) and mesons ($K^0_S$) at intermediate transverse momentum (3 $<$ $p_T$ $<$ 6 GeV/$c$) to look for possible flavor and baryon/meson dependence. This study is performed in $d$+Au, Cu+Cu and Au+Au collisions at $\sqrt{s_{{NN}}}$ = 200 GeV measured by the STAR experiment at RHIC. The near-side di-hadron correlation contains two structures, a peak which is narrow in azimuth and pseudorapidity consistent with correlations due to jet fragmentation, and a correlation in azimuth which is broad in pseudorapidity. The particle composition of the jet-like correlation is determined using identified associated particles. The dependence of the conditional yield of the jet-like correlation on the trigger particle momentum, associated particle momentum, and centrality for correlations with unidentified trigger particles are presented. The neutral strange particle composition in jet-like correlations with unidentified charged particle triggers is not well described by PYTHIA. However, the yield of unidentified particles in jet-like correlations with neutral strange particle triggers is described reasonably well by the same model.

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