Beam-energy dependence of the directed flow of protons, antiprotons, and pions in Au+Au collisions.

L Adamczyk,Z Chang,S Raniwala,A Sarkar,F Videbæk,B Srivastava,L Kotchenda,J Porter,Y Fisyak,Y Zawisza,Y Zhang,N Poljak,D Tlusty,G Odyniec,V Okorokov,D Cebra,F Wang,C Perkins,O Rusnakova,H Masui,L Didenko,M Calderón De La Barca Sánchez,E Sangaline,J Konzer,H Bichsel,X Zhu,S Horvat,C Markert,C Dilks,O Eyser,J Seger,F Ding,H Wieman,S Kabana,G Igo,A Banerjee,T Pawlak,Z Tang,I Alekseev,R Fatemi,L Yi,D Grosnick,R Stock,L Eun,H Zbroszczyk,P Seyboth,G Van Nieuwenhuizen,Y Panebratsev,Md Nasim,P Yepes,X Li,J Alford,I Bunzarov,W Guryn,M Wada,B Huang,P Filip,W Xie,L Chen,A Vossen,A Hamed,A Gupta,K Kauder,K Kang,J Butterworth,J Cheng,A Ohlson,H Wang,B Sharma,J Bouchet,B Pawlik,Y Xu,S Ramachandran,K Yip,I Kisel,R Derradi De Souza,T Tarnowsky,B Surrow,Y Li,Z Ahammed,M Pachr,A Hirsch,I Kulakov,K Xin,D Keane,J Deng,S Trentalange,A Quintero,B Di Ruzza,A Gibson,R Raniwala,Y Wang,Z Sun,H Pei,W Li,D Smirnov,Y Zoulkarneeva,S Dhamija,A Kesich,B Mohanty,B Haag,B Stringfellow,R Cendejas,J Schambach,E Finch,T Kollegger,H Caines,J Engelage,S Fazio,A Aparin,N Yu,A Kisiel,M Lomnitz,G Agakishiev,X Luo,D Garand,P Tribedy,H Qiu,S Margetis,P Djawotho,A Davila Leyva,L Ruan,I Koralt,N Xu,T Ullrich,I Sakrejda,R Majka,K Oh,G Van Buren,J Lauret,J Takahashi,X Dong,G Contin,G Webb,R Witt,S Chattopadhyay,S Zhang,F Liu,M Zyzak,O Evdokimov,P Sorensen,S Mioduszewski,Y Pandit,G Nigmatkulov,S Das,M Strikhanov,W Christie,N Smirnov,C Li,A Lebedev,Y Sun,N Schmitz,M Vandenbroucke,G Wang,L Greiner,X Huang,W Borowski,S Gliske,R Haque,S Gupta,D Arkhipkin,A Ogawa,P Huck,A Kechechyan,P Chaloupka,W Peryt,M Cherney,R Bellwied,P Pile,A Bhasin,P Bhattarai,K Krueger,A Chikanian,R Varma,S Bültmann,J Sandweiss,D Solanki,D Mcdonald,S Heppelmann,M Tokarev,J Putschke,N Shah,M Shao,S Salur,J Turnau,Z Ye,D Kalinkin,Z Xu,W Zha,E Shahaliev,J Pluta,G Eppley,Y Guo,L Kumar,J Zhao,A Roy,X Cui,R Singaraju ,D P Mahapatra ,B S Page ,J R Stevens ,N K Pruthi ,P K Sahu ,I K Yoo ,I G Bordyuzhin ,O D Tsai ,Q H Xu ,M A Lisa ,J Bielčík ,B K Nandi ,L C De Silva ,M C Cervantes ,N Sahoo ,M M Mondal ,S K Pal ,T S Mcshane ,A Schmah ,M Šumbera ,T D S Stanislaus ,J H Chen ,Zhong Chen ,G D Westfall ,A A Derevschikov ,C M Du ,H S Matis ,J Bielčíková ,A V Brandin ,J H Thomas ,D D Koetke ,E P Sichtermann ,P V Shanmuganathan ,M Przybycień ,D M M D Madagodagettige Don ,R P Scharenberg ,Z M Li ,M J Levine ,D J Hofman ,J L Zhang ,J Rusňák ,J L Drachenberg ,D P Kikoła ,R Debbe ,H J Crawford ,E G Judd ,G L ,J K Adkins ,Q Shou ,T P Burton ,H G Ritter ,A H Tang ,Y Wu ,W J Llope ,R S Longacre ,G W Hoffmann ,D G Underwood ,F J M Geurts ,J Fedorišin ,J Novák ,J Roberts ,S G Brovko ,G S Averichev ,T K Nayak ,D Olvitt ,R L Ray ,S Y Noh ,M J Skoby ,P R Pujahari ,Yan Wang ,J C Webb ,C E Flores ,K D Landry ,H M Spinka ,R A Kycia ,Xiao Zhang ,K S Engle ,R Lednický ,J M Landgraf ,S B Nurushev ,A Vasiliev ,B A Trzeciak ,Z P Zhang ,Д А Морозов ,R E Tribble ,O V Rogachevskiy ,Y X Pan ,D S Gunarathne ,J F Ross ,M Planinić ,S S Shi ,J S Wang ,H F Chen ,A R Timmins ,D N Svirida ,Feng Zhao ,T J Humanic ,S W Wissink ,C A Gagliardi ,R Vértesi ,J W Harris ,H J Jang ,T G Dedovich ,M K Mustafa ,T Ljubičić ,X L Wang ,D Beavis ,J H Lee ,D R Gangadharan ,Z H Khan ,H W Ke ,X P Zhang ,Yang Yu ,E W Oldag ,W B Schmidke ,M M Aggarwal ,L V Nogach ,A M Poskanzer ,N G Minaev ,A K Bhati ,W W Jacobs ,M Fusco Girard ,S Vokál ,J A Vanfossen ,X M Sun ,Michal Szelezniak ,L G Efimov ,W Q Shen ,M A.c Lamont ,J E Draper ,C B Yang ,H Z Huang ,A F Kraishan ,L Han ,L C Bland ,J G Cramer ,Y P Viyogi ,J J Chwastowski ,Y Zhu ,E C Aschenauer ,M J M Codrington ,C Anson ,J B Zhang ,J C Dunlop ,G M.s Vasconcelos ,J M Nelson ,L E Dunkelberger ,Jun Xu ,П Кравцов ,T J M Symons ,C K Riley ,Y G ,J L Romero ,H S Xu

doi:10.1103/physrevlett.112.162301

Abstract

Rapidity-odd directed flow (v1) measurements for charged pions, protons, and antiprotons near midrapidity (y=0) are reported in sNN=7.7, 11.5, 19.6, 27, 39, 62.4, and 200GeV Au+Au collisions as recorded by the STAR detector at the Relativistic Heavy Ion Collider. At intermediate impact parameters, the proton and net-proton slope parameter dv1/dy|y=0 shows a minimum between 11.5 and 19.6GeV. In addition, the net-proton dv1/dy|y=0 changes sign twice between 7.7 and 39GeV. The proton and net-proton results qualitatively resemble predictions of a hydrodynamic model with a first-order phase transition from hadronic matter to deconfined matter, and differ from hadronic transport calculations.

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