Di-hadron correlations with identified leading hadrons in 200 GeV Au+Au and d+Au collisions at STAR

L Adamczyk,J K Adkins,G Agakishiev,M M Aggarwal, Z Ahammed,I Alekseev,J Alford,A Aparin,D Arkhipkin,E C Aschenauer,G S Averichev,Amit Banerjee,R Bellwied,A Bhasin, A K Bhati,P Bhattarai, J Bielcik, J Bielcikova,L C Bland,I G Bordyuzhin,J Bouchet,A V Brandin,I Bunzarov,T P Burton,J M Butterworth,H Caines,M Calderon De La Barca Sanchez, J M Campbell, D Cebra,M C Cervantes,I Chakaberia,P Chaloupka,Z Chang,S K Chattopadhyay, J H Chen,Xiangqun Chen,J Cheng,M Cherney,W Christie,G Contin,H J Crawford,S Das,L C De Silva,R Debbe,T G Dedovich, Jianming Deng,A A Derevschikov,B Di Ruzza,L Didenko,C Dilks,X Dong,J L Drachenberg,J E Draper,C M Du,L E Dunkelberger,J C Dunlop,L G Efimov,J Engelage,G Eppley,R Esha,O Evdokimov,O Eyser,R Fatemi,S Fazio,P Federic,J Fedorisin,Z Feng,P Filip,Y Fisyak,C E Flores,L Fulek,C A Gagliardi,D Garand,F J M Geurts,A Gibson,Mario Fusco Girard,L Greiner,D Grosnick,D S Gunarathne,Yao Guo, A K Gupta,S Gupta,W Guryn, A Hamad,A Hamed,Rashidul Haque,J W Harris,Liwei He,S Heppelmann, A Hirsch,G W Hoffmann,D J Hofman,S Horvat,Bin Huang,X Huang,H Z Huang, P Huck,T J Humanic

PHYSICS LETTERS B（2015）

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摘要

The STAR Collaboration presents for the first time two-dimensional di-hadron correlations with identified leading hadrons in 200 GeV central Au+Au and minimum-bias d+Au collisions to explore hadronization mechanisms in the quark gluon plasma. The enhancement of the jet-like yield for leading pions in Au + Au data with respect to the d + Au reference and the absence of such an enhancement for leading non-pions (protons and kaons) are discussed within the context of a quark recombination scenario. The correlated yield at large angles, specifically in the ridge region, is found to be significantly higher for leading non-pions than pions. The consistencies of the constituent quark scaling, azimuthal harmonic model and a mini-jet modification model description of the data are tested, providing further constraints on hadronization. (C) 2015 The Authors. Published by Elsevier B.V.

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关键词

quark gluon plasma,scaling,hadron,star,hadronization

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