Precision Measurement of the Longitudinal Double-Spin Asymmetry for Inclusive Jet Production in Polarized Proton Collisions at sqrt[s]=200 GeV.

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

doi:10.1103/physrevlett.115.092002

Abstract

We report a new measurement of the midrapidity inclusive jet longitudinal double-spin asymmetry, A_{LL}, in polarized pp collisions at center-of-mass energy sqrt[s]=200 GeV. The STAR data place stringent constraints on polarized parton distribution functions extracted at next-to-leading order from global analyses of inclusive deep-inelastic scattering (DIS), semi-inclusive DIS, and RHIC pp data. The measured asymmetries provide evidence at the 3σ level for positive gluon polarization in the Bjorken-x region x>0.05.

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