Midrapidity neutral-pion production in proton-proton collisions at square root s = 200 GeV.

S S Adler,J C Hill,E Vznuzdaev,Y Berdnikov,M Velkovsky,M Hibino,C A Ogilvie,R Santo,M Muniruzzaman,W C Chang,A Kozlov,I Ravinovich,O Drapier,V Peresedov,J Choi,R S Towell,P Chand,S S Kapoor,C L Woody,S Butsyk,S K Tuli,O Dietzsch,Y Akiba,T L Thomas,Y Kuroki,T Peitzmann,J Newby,Y Watanabe,S Batsouli,S C Johnson,Y Tanaka,E M Takagui,S Garpman,A K Purwar,Y Cobigo,M J Kweon,J L Nagle,I V Sourikova,R A Soltz,K Tanida,M L Brooks,T K Hemmick,F Matathias,R Azmoun,V Bumazhnov,J Murata,W E Sondheim,J S Haggerty,M Nara,S Mioduszewski,K Katou,A D Frawley,R P Pisani,A Denisov,G R Young,K Imai,K Kiyoyama,M Harvey,M Issah,S Chernichenko,J M Heuser,A Franz,N N Ajitanand,Y I Makdisi,C Pinkenburg,Y Goto,A Ster,V Singh,E Kistenev,S Yokkaichi,M Ono,M J Leitch,S Bhagavatula,N Bruner,N Kamihara,L Villatte,J E Frantz,A Taketani,J G Boissevain,I Otterlund,R Amirikas,P L Mcgaughey,J Chiba,M Rosati,V Cianciolo,V V Ikonnikov,S Leckey,F K Wohn,S Borenstein,L Sanfratello,S Bathe,K El Chenawi,F Staley,W Holzmann,R Seto,T K Shea,T Ichihara,J M Burward-Hoy,F Messer,K A Drees,K S Sim,C H Kuberg,B Khachaturov,E Stenlund,S H Aronson,K N Barish,E J Desmond,A Romana,B D Fox,W Y Jang,M Stepanov,T Shiina,P J Kroon,B Bassalleck,D M Lee,H W Van Hecke,M J Tannenbaum,T Kohama,A Deshpande,S Sawada,V Baublis,J G Lajoie,A Bazilevsky,K Okada,M Grosse Perdekamp,A Durum,S Esumi,A S Nyanin,G David,Y Riabov,D Isenhower,R Lacey,E P Hartouni,D P Morrison,S Afanasiev,L Ewell,M Gonin,T C Awes,Z Fraenkel,D Mukhopadhyay,B M Johnson,M Chiu,C P Singh,M Heffner,G Bunce,P Tarján,D Koehler,M Sivertz,G Gogiberidze,S Kametani,S F Pate,P W Stankus,A Hoover,V Babintsev,G S Kyle,R Du Rietz,W Guryn,V Papavassiliou,H Tsuruoka,G Roche,A Yanovich,W A Zajc,R Granier De Cassagnac,A Isupov,R E Mischke,D E Fields,M Kopytine,J D Tepe,H Masui,A Drees,L Kochenda,I J Choi,I E Yushmanov,J H Kang,X Camard,S Zhou,S P Stoll,I D Ojha,D Bucher,R K Choudhury,K Kurita,I Tserruya,T Matsumoto,J Milan,L Aphecetche,A Lebedev,M E Sadler,A Enokizono,T Hachiya,E Melnikov,D Jouan,H Delagrange,N Grau,S Nagamiya,D Kotchetkov,А Виноградов ,D D’enterria ,T E Miller,H Ohnìshì ,P Nilsson,J Nystrand,H En’Yo,D W Kim,Y Schütz ,Jun Kikuchi ,M L Purschke,Kazuhiro Tanaka ,H.-Å Gustafsson,J Jia,M X Liu,B K Nandi,X R Wang,S Sörensen ,X He,Y Kwon,G Martı́nez ,K S Joo,M Marx ,J T Mitchell,M Ishihara,A Hansen ,K Reygers,A Baldisseri,R S Hayano ,C Maguire ,K Oyama,F Mühlbacher,S Greene ,J Rak,H Buesching,S Fokin ,Susumu Sato ,D H Kim,S White ,X H Li,M Reuter,Y Yang,V Kochetkov,Christian Klein-Boesing ,P D Barnes,T Sakaguchi,A Milov,V Pantuev ,H Torii,J S Chai ,A P.t Palounek ,V Onuchìn ,G C Mishra,Tarun Kanti Ghosh ,M R Shaw,R Averbeck,V P Ladygin ,D Pal,Y Mao,V Semenov,J Tojo,P Constantin,A Soldatov,J Gösset ,J.p Sullivan ,Yu Seon Jeong ,H Tydesjö,C Y ,C A Aidala ,С Беликов ,D S Brown,S Y Fung ,A Parmar,D J Kim,F Plášil ,A Litvinenko,A Malakhov,A Öskarsson ,D Silvermyr,M Sakai,Y V Efremenko,B Jacak ,A Khanzadeev,Y Miake,М А Volkov ,E O’Brien,J Velkovska,J M Moss,B Cole ,V Samsonov,J Alexander,D Dutta,E Kim,T A Shibata ,F Fleuret,V Manko ,P Rosnet,H Lim,K Homma,N Saito,A Kiyomichi,T Sugitate,N Tyurin,M Tamai,B Hong,K Ozawa,A K Mohanty,V Riabov,H Borel,Y Liu,S S Ryu,T Nakamura,O Jinnouchi,G B Kim ,T Chujo,Hisao Kobayashi ,H J Kim,K F Read,S Kelly,S Sakai,C L Silva,L Zolin,K Shigaki,H Hamagaki,H Sato ,J C Peng ,J Park,W Xie,A Glenn,S Lee,C Zhang

doi:10.1103/physrevlett.91.241803

Abstract

The invariant differential cross section for inclusive neutral-pion production in p+p collisions at sqrt[s]=200 GeV has been measured at midrapidity (|eta|<0.35) over the range 1<p(T) less, similar 14 GeV/c by the PHENIX experiment at the Relativistic Heavy Ion Collider. Predictions of next-to-leading order perturbative QCD calculations are consistent with these measurements. The precision of our result is sufficient to differentiate between prevailing gluon-to-pion fragmentation functions.

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