Pseudorapidity asymmetry and centrality dependence of charged hadron spectra in d+Au collisions at sNN=200GeV

J R Adams ,A Boucham,P Filip,E Yamamoto,B Erazmus,D Magestro,M Tokarev,K Schweda,M Lopez-Noriega,A Urkinbaev,S Kabana,S Bekele,M Cherney,A Ogawa,E Shahaliev,H Long,D Arkhipkin,D Keane,L Kotchenda,A Bravar,H Ward,J Engelage,M Strikhanov,G Igo,P Sorensen,J Gans,P Szarwas,A Wetzler,A Ishihara,A Tai,Y Panebratsev,Y Li,R Witt,S Chattopdhyay,E Hjort,R Varma,G Eppley,X Dong,L Gaudichet,S Hepplemann,R Picha,M Shao,F Liu,B Stringfellow,D Thein,K Krueger,D Reichhold,H Caines,T Pawlak,G Odyniec,T Peitzmann,A Lebedev,J Balewski,M Estienne,M Botje,G Sood,Y Zoulkarneeva,J Baudot,A Chikanian,T Ullrich,C Perkins,W Peryt,P Seyboth,M Kopytine,L Gaillard,E Potrebenikova,S Trentalange,A Hamed,J Sandweiss,V Perevoztchikov,J Speltz,J Ulery,S Timoshenko,N Xu,V Ghazikhanian,R Stock,P Yepes,R Fatemi,J Castillo,W Christie,F Du,G Wang,S Lange,E Finch,D Grosnick,Y Bai,D Cebra,M Sarsour,J Amonett,G Renault,J Takahashi,T Tarnowsky,G Van Buren,L Ruan,P Fachini,X Cai,G Lin,I Sakrejda,L Didenko,A Ridiger,A Stolpovsky,J Pluta,J Lauret,A Rose,M Van Leeuwen,D Hardtke,V Fine,A Billmeier,V Eckardt,R Manweiler,N Schmitz,O Barannikova,M Oldenburg,P Chaloupka,H Bichsel,R Zoulkarneev,E Sugarbaker,M Potekhin,J Porter,K Fomenko,C Roy,J Cheng,Y Fisyak,S Margetis,M Heinz,A Szanto De Toledo,F Laue,A Stadnik,C F Moore ,P K Netrakanti ,А И Куликов ,M Bysterský ,J Sowiński ,А А Кузнецов ,P M Jacobs ,B Mohanty,R Raniwala,R Majka,J N Marx ,D Olson,C Whitten,T J Hallman ,L S Barnby ,Raimond Snellings ,R Lednický ,G S Averichev ,N G Minaev ,Z P Zhang ,B Potukuchi,K E Shestermanov ,R.kh Kutuev ,L Liu,T Dietel,J C Dunlop ,G L ,Yu A Matulenko ,B Srivastava,S Vokál ,S Lehocká ,S C Phatak ,M Calderón De La Barca Sánchez ,В А Никитин ,H F Chen ,I M Vasilevski ,S Huang,S Mahajan,W W Jacobs ,O D Tsai ,A K Dubey ,J L Romero ,W Shao,N Smirnov,R V Cadman ,Y Lu,S J Lindenbaum ,L V Nogach ,R Sahoo,Z Chajęcki ,S V Razin ,S A Voloshin ,H Wieman,J Fedorišin ,W A Love ,T Ludlam,R L Ray ,J G Cramer ,O G Grebenyuk ,Ashish Kumar ,C O Blyth ,A I Pavlinov ,F Retière ,Jiang Fu ,J Putschke,X L Wang ,H S Matis ,J L Klay ,J S Wood ,D Das,H J Crawford ,A Mischke,T D Gutierrez ,J Faivre,D D Koetke ,Z M Wang ,Z Ahammed,A Bhasin,J M Nelson ,J Seger,П Кравцов ,E M Kislov ,V I Kravtsov ,V B Dunin ,O Grachov,Samarth Bharadwaj ,Y Chen,M G Munhoz ,C Mironov,A Gupta,O V Rogachevskiy ,В А Петров ,E P Sichtermann ,W T Waggoner ,W J Llope ,S Raniwala,M A.c Lamont ,V Yu Khodyrev ,S Salur,M Janik,S R Klein ,M Krämer ,L G Efimov ,Johann Joachim Schambach ,I Savin,T D S Stanislaus ,S Dogra,M M De Moura ,R P Scharenberg ,J G Reid ,L K Mangotra ,M J Levine ,Д А Морозов ,S W Wissink ,Y Zanevsky,O Ravel,R Singaraju,J P Coffin ,M S Ganti ,Jian Wu ,S Panitkin,H Z Huang ,J Roberts,W M Zhang ,D K Mishra ,W R Edwards ,T W Henry ,A H Tang ,S M Guertin ,G W Hoffmann ,W Q Shen ,R S Longacre ,R Bellwied,K Kang,E G Judd ,A Kisiel,K Filimonov,M M Aggarwal ,T J Humanic ,H Jiang,B D Anderson ,M Šumbera ,S Das,N Porile,C Kuhn,A M Vander Molen ,D Lynn,L Molnár ,J G ,Alexandre Alarcon Do Passo Suaide ,D P Mahapatra ,A Vasiliev,G Škoro ,L M Garcia Martin ,В Емелянов ,G D Westfall ,G Rakness,E W Hughes ,V I Yurevich ,Yu Melnick ,Y Wang,V S Bhatia ,Y G ,T A Trainor ,A Hirsch,М Взнуздаев ,M J Mora-Corral ,D Prindle,P Jones,J T Mitchell ,C Li,C Pruneau,B K Nandi ,Subrata Pal ,C Markert,P S Sazhin ,Guo Yun ,M R Dutta Mazumdar ,J C Webb ,M A Lisa ,R Wells,C Suire,J W Watson ,A Meschanin,S S Shimanskiy ,H Spinka,A A Derevschikov ,S E Vigdor ,B I Bezverkhny ,Thomas Michael Cormier ,Y P Viyogi ,H Zhang,M Planinić ,R Vernet,A V Brandin ,V Okorokov,Michael L Miller ,B Hippolyte,D G Underwood ,M Kaplan,F Meißner ,C A Gagliardi ,A K Bhati ,T J M Symons ,B Surrow,S K Nayak ,J M Landgraf ,T K Nayak ,T Ljubičić ,Z Liu,V V Belaga ,B E Bonner ,Q J Liu ,A M Poskanzer ,W J Dong ,Z Xu,F Wang,J E Gonzalez ,P Ghosh,C J Mcclain ,S B Nurushev ,Q Li,H G Ritter ,T Kollegger,R E Tribble ,J E Draper ,J H Thomas ,F J M Geurts ,J Berger,J Kiryluk,F Simon,J W Harris ,M Sharma,L C Bland ,T S Mcshane ,A N Zubarev

doi:10.1103/physrevc.70.064907

Abstract

The pseudorapidity asymmetry and centrality dependence of charged hadron spectra in d+Au collisions at $\sqrt{s_{NN}}=200$ GeV are presented. The charged particle density at mid-rapidity, its pseudorapidity asymmetry and centrality dependence are reasonably reproduced by a Multi-Phase Transport model, by HIJING, and by the latest calculations in a saturation model. Ratios of transverse momentum spectra between backward and forward pseudorapidity are above unity for \pT below 5 GeV/$c$. The ratio of central to peripheral spectra in d+Au collisions shows enhancement at 2 $<$ \pT $<$ 6 GeV/$c$, with a larger effect at backward rapidity than forward rapidity. Our measurements are in qualitative agreement with gluon saturation and in contrast to calculations based on incoherent multiple partonic scatterings.

Full Text