Measurement Of Bottom Versus Charm As A Function Of Transverse Momentum With Electron-Hadron Correlations In P Plus P Collisions At S=200 Gev

A. Adare,S. Afanasiev,C. Aidala,N. N. Ajitanand,Y. Akiba,H. Al-Bataineh,J. Alexander,K. Aoki,L. Aphecetche,R. Armendariz,S. H. Aronson,J. Asai,E. Atomssa,R. Averbeck,T. Awes,B. Azmoun,V. Babintsev,M. Bai,G. Baksay,L. Baksay,A. Baldisseri,K. Barish,P. Barnes,B. Bassalleck,A. Basye,S. Batsouli,V. Baublis,C. Baumann,A. Bazilevsky,S. Belikov,R. Bennett,A. Berdnikov,Y. Berdnikov,A. Bickley,J. Boissevain,H. Borel,K. Boyle,M. Brooks,H. Buesching,V. Bumazhnov,G. Bunce,S. Butsyk,C. Camacho,S. Campbell,B. Chang,W. Chang,J.-L. Charvet,S. Chernichenko,J. Chiba,C. Chi,M. Chiu,I. Choi,R. Choudhury,T. Chujo,P. Chung,A. Churyn,V. Cianciolo,Z. Citron,C. Cleven,B. Cole,M. Comets,P. Constantin,M. Csanád,T. Csörgő,T. Dahms,S. Dairaku,K. Das,G. David,M. Deaton,K. Dehmelt,H. Delagrange,A. Denisov,D. d’Enterria,A. Deshpande,E. Desmond,O. Dietzsch,A. K. Dubey,M. Donadelli,O. Drapier,A. Drees,K. Drees,A. Dubey,A. Durum,D. Dutta,V. Dzhordzhadze,Y. Efremenko,J. Egdemir,F. Ellinghaus,W. Emam,T. Engelmore,A. Enokizono,H. En’yo,S. Esumi,K. Eyser,B. Fadem,D. Fields,Jr. M. Finger,M. Finger,F. Fleuret,S. Fokin,Z. Fraenkel,J. Frantz,A. Franz,A. Frawley,K. Fujiwara,Y. Fukao,T. Fusayasu,S. Gadrat,I. Garishvili,A. Glenn,H. Gong,M. Gonin,J. Gosset,Y. Goto,R. Granier de Cassagnac,N. Grau,S. Greene,M. Perdekamp,T. Gunji,H.-Å. Gustafsson,T. Hachiya,A. Henni,C. Haegemann,J. Haggerty,H. Hamagaki,R. Han,H. Harada,E. Hartouni,K. Haruna,E. Haslum,R. Hayano,M. Heffner,T. Hemmick,T. Hester,X. He,H. Hiejima,J. Hill,R. Hobbs,M. Hohlmann,W. Holzmann,K. Homma,B. Hong,T. Horaguchi,D. Hornback,S. Huang,T. Ichihara,R. Ichimiya,Y. Ikeda,K. Imai,J. Imrek,M. Inaba,Y. Inoue,D. Isenhower,L. Isenhower,M. Ishihara,T. Isobe,M. Issah,A. Isupov,D. Ivanischev,B. Jacak,J. Jia,J. Jin,O. Jinnouchi,B. Johnson,K. Joo,D. Jouan,F. Kajihara,S. Kametani,N. Kamihara,J. Kamin,M. Kaneta,J. Kang,H. Kanou,J. Kapustinsky,D. Kawall,A. Kazantsev,T. Kempel,A. Khanzadeev,K. Kijima,J. Kikuchi,B. Kim,D. Kim,E. Kim,S. Kim,E. Kinney,K. Kiriluk,A. Kiss,E. Kistenev,A. Kiyomichi,J. Klay,C. Klein-Boesing,L. Kochenda,V. Kochetkov,B. Komkov,M. Konno,J. Koster,D. Kotchetkov,A. Kozlov,A. Král,A. Kravitz,J. Kubart,G. Kunde,N. Kurihara,K. Kurita,M. Kurosawa,M. Kweon,Y. Kwon,G. Kyle,R. Lacey,Y.-S. Lai,Y. Lai,J. Lajoie,D. Layton,A. Lebedev,D. Lee,K. Lee,M. Lee,T. Lee,M. Leitch,M. Leite,B. Lenzi,P. Liebing,T. Liška,A. Litvinenko,H. Liu,M. Liu,X. Li,B. Love,D. Lynch,C. Maguire,Y. Makdisi,A. Malakhov,M. Malik,V. Manko,E. Mannel,Y. Mao,L. Mašek,H. Masui,F. Matathias,M. McCumber,P. McGaughey,N. Means,B. Meredith,Y. Miake,P. Mikeš,K. Miki,T. Miller,A. Milov,S. Mioduszewski,M. Mishra,J. Mitchell,M. Mitrovski,A. Mohanty,Y. Morino,A. Morreale,D. Morrison,T. Moukhanova,D. Mukhopadhyay,J. Murata,S. Nagamiya,Y. Nagata,J. Nagle,M. Naglis,M. Nagy,I. Nakagawa,Y. Nakamiya,T. Nakamura,K. Nakano,J. Newby,M. Nguyen,T. Niita,B. Norman,R. Nouicer,A. Nyanin,E. O’Brien,S. Oda,C. Ogilvie,H. Ohnishi,H. Okada,K. Okada,M. Oka,O. Omiwade,Y. Onuki,A. Oskarsson,M. Ouchida,K. Ozawa,R. Pak,D. Pal,A. Palounek,V. Pantuev,V. Papavassiliou,J. Park,W. Park,S. Pate,H. Pei,J.-C. Peng,H. Pereira,V. Peresedov,D. Peressounko,C. Pinkenburg,M. Purschke,A. Purwar,H. Qu,J. Rak,A. Rakotozafindrabe,I. Ravinovich,K. Read,S. Rembeczki,M. Reuter,K. Reygers,V. Riabov,Y. Riabov,D. Roach,G. Roche,S. Rolnick,A. Romana,M. Rosati,S. Rosendahl,P. Rosnet,P. Rukoyatkin,P. Ružička,V. Rykov,B. Sahlmueller,N. Saito,T. Sakaguchi,S. Sakai,K. Sakashita,H. Sakata,V. Samsonov,S. Sato,T. Sato,S. Sawada,K. Sedgwick,J. Seele,R. Seidl,A. Semenov,V. Semenov,R. Seto,D. Sharma,I. Shein,A. Shevel,T.-A. Shibata,K. Shigaki,M. Shimomura,K. Shoji,P. Shukla,A. Sickles,C. Silva,D. Silvermyr,C. Silvestre,K. Sim,B. Singh,C. Singh,V. Singh,S. Skutnik,M. Slunečka,A. Soldatov,R. Soltz,W. Sondheim,S. Sorensen,I. Sourikova,F. Staley,P. Stankus,E. Stenlund,M. Stepanov,A. Ster,S. Stoll,T. Sugitate,C. Suire,A. Sukhanov,J. Sziklai,T. Tabaru,S. Takagi,E. Takagui,A. Taketani,R. Tanabe,Y. Tanaka,K. Tanida,M. Tannenbaum,A. Taranenko,P. Tarján,H. Themann,T. Thomas,M. Togawa,A. Toia,J. Tojo,L. Tomášek,Y. Tomita,H. Torii,R. Towell,V. N. Tram,I. Tserruya,Y. Tsuchimoto,C. Vale,H. Valle,H. van Hecke,A. Veicht,J. Velkovska,R. Vertesi,A. Vinogradov,M. Virius,V. Vrba,E. Vznuzdaev,M. Wagner,D. Walker,X. Wang,Y. Watanabe,F. Wei,J. Wessels,S. White,D. Winter,C. Woody,M. Wysocki,W. Xie,Y. Yamaguchi,K. Yamaura,R. Yang,A. Yanovich,Z. Yasin,J. Ying,S. Yokkaichi,G. Young,I. Younus,I. Yushmanov,W. Zajc,O. Zaudtke,C. Zhang,S. Zhou,J. Zimányi,L. Zolin

PHYSICAL REVIEW LETTERS（2009）

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摘要

The momentum distribution of electrons from semileptonic decays of charm and bottom quarks for midrapidity |y|< 0.35 in p+p collisions at s=200 GeV is measured by the PHENIX experiment at the Relativistic Heavy Ion Collider over the transverse momentum range 2 < p(T)< 7 GeV/c. The ratio of the yield of electrons from bottom to that from charm is presented. The ratio is determined using partial D/D -> e(+/-)K(-/+)X (K unidentified) reconstruction. It is found that the yield of electrons from bottom becomes significant above 4 GeV/c in p(T). A fixed-order-plus-next-to-leading-log perturbative quantum chromodynamics calculation agrees with the data within the theoretical and experimental uncertainties. The extracted total bottom production cross section at this energy is sigma(bb)=3.2(-1.1)(+1.2)(stat)(-1.3)(+1.4)(syst)mu b.

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