Dijet imbalance measurements in Au+Au and pp collisions at sqrt[s_{NN}]=200 GeV at STAR.

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

PHYSICAL REVIEW LETTERS（2017）

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摘要

We report the first dijet transverse momentum asymmetry measurements from Au + Au and pp collisions at RHIC. The two highest-energy back-to-back jets reconstructed from fragments with transverse momenta above 2 GeV/c display a significantly higher momentum imbalance in heavy-ion collisions than in the pp reference. When reexamined with correlated soft particles included, we observe that these dijets then exhibit a unique new feature-momentum balance is restored to that observed in pp for a jet resolution parameter of R = 0.4, while rebalancing is not attained with a smaller value of R = 0.2.

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关键词

Jet quenching,Momentum,Quark–gluon plasma,STAR detector,Hadron,Nuclear reaction,Jet (particle physics),Asymmetry,Nuclear physics,Particle physics,Physics

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