Correlations of μμ, eμ, and ee pairs in p+p collisions at √(s)=200 GeV and implications for cc̅ and bb̅ production mechanisms

C. Aidala, Y. Akiba,M. Alfred,V. Andrieux, N. Apadula, H. Asano, B. Azmoun,V. Babintsev,A. Bagoly,N. S. Bandara,K. N. Barish, S. Bathe, A. Bazilevsky,M. Beaumier, R. Belmont,A. Berdnikov, Y. Berdnikov, D. S. Blau,M. Boer,J. S. Bok, M. L. Brooks, J. Bryslawskyj,V. Bumazhnov,S. Campbell,V. Canoa Roman,R. Cervantes,C. Y. Chi, M. Chiu, I. J. Choi, J. B. Choi, Z. Citron,M. Connors,N. Cronin, M. Csanád, T. Csörgő,T. W. Danley, M. S. Daugherity, G. David,K. DeBlasio,K. Dehmelt, A. Denisov,A. Deshpande,E. J. Desmond, A. Dion,D. Dixit,J. H. Do,A. Drees,K. A. Drees,J. M. Durham, A. Durum, A. Enokizono, H. En'yo, S. Esumi,B. Fadem,W. Fan,N. Feege, D. E. Fields, M. Finger, M. Jr. Finger,S. L. Fokin,J. E. Frantz, A. Franz,A. D. Frawley,Y. Fukuda,C. Gal, P. Gallus,P. Garg,H. Ge,F. Giordano, Y. Goto,N. Grau,S. V. Greene,M. Grosse Perdekamp,T. Gunji,H. Guragain, T. Hachiya, J. S. Haggerty, K. I. Hahn, H. Hamagaki,H. F. Hamilton,S. Y. Han,J. Hanks,S. Hasegawa,T. O. S. Haseler, X. He,T. K. Hemmick, J. C. Hill, K. Hill,A. Hodges,R. S. Hollis, K. Homma,B. Hong,T. Hoshino,N. Hotvedt,J. Huang,S. Huang,K. Imai,M. Inaba, A. Iordanova, D. Isenhower,D. Ivanishchev,B. V. Jacak,M. Jezghani,Z. Ji,X. Jiang,B. M. Johnson,D. Jouan,D. S. Jumper,J. H. Kang,D. Kapukchyan,S. Karthas, D. Kawall,A. V. Kazantsev,V. Khachatryan,A. Khanzadeev,C. Kim,E. -J. Kim,M. Kim,D. Kincses, E. Kistenev, J. Klatsky,P. Kline,T. Koblesky,D. Kotov, S. Kudo, K. Kurita, Y. Kwon,J. G. Lajoie, A. Lebedev,S. Lee,S. H. Lee,M. J. Leitch,Y. H. Leung, N. A. Lewis, X. Li,S. H. Lim, M. X. Liu,V-R Loggins,S. Lökös,K. Lovasz,D. Lynch,T. Majoros,Y. I. Makdisi, M. Makek,V. I. Manko, E. Mannel, M. McCumber,P. L. McGaughey,D. McGlinchey, C. McKinney,M. Mendoza, A. C. Mignerey, D. E. Mihalik,A. Milov,D. K. Mishra, J. T. Mitchell,G. Mitsuka, S. Miyasaka,S. Mizuno,P. Montuenga,T. Moon,D. P. Morrison, S. I. Morrow,T. Murakami,J. Murata,K. Nagai, K. Nagashima,T. Nagashima, J. L. Nagle,M. I. Nagy,I. Nakagawa,K. Nakano,C. Nattrass,T. Niida, R. Nouicer,T. Novák,N. Novitzky, A. S. Nyanin, E. O'Brien, C. A. Ogilvie,J. D. Orjuela Koop,J. D. Osborn, A. Oskarsson,G. J. Ottino,K. Ozawa, V. Pantuev, V. Papavassiliou,J. S. Park,S. Park,S. F. Pate,M. Patel,W. Peng, D. V. Perepelitsa,G. D. N. Perera,D. Yu. Peressounko,C. E. PerezLara,J. Perry, R. Petti,M. Phipps, C. Pinkenburg, R. P. Pisani,M. L. Purschke,P. V. Radzevich, K. F. Read,D. Reynolds, V. Riabov, Y. Riabov,D. Richford,T. Rinn,S. D. Rolnick, M. Rosati,Z. Rowan,J. Runchey,A. S. Safonov,T. Sakaguchi,H. Sako,V. Samsonov,M. Sarsour,S. Sato,B. Schaefer,B. K. Schmoll, K. Sedgwick,R. Seidl,A. Sen, R. Seto,A. Sexton,D. Sharma, I. Shein, T. -A. Shibata, K. Shigaki, M. Shimomura,T. Shioya,P. Shukla,A. Sickles,C. L. Silva,D. Silvermyr, B. K. Singh, C. P. Singh, V. Singh,M. J. Skoby, M. Slunečka,M. Snowball, R. A. Soltz, W. E. Sondheim,S. P. Sorensen, I. V. Sourikova,P. W. Stankus,S. P. Stoll,T. Sugitate,A. Sukhanov,T. Sumita,J. Sun, Z Sun, Z. Sun,J. Sziklai,K. Tanida,M. J. Tannenbaum,S. Tarafdar,A. Taranenko,A. Taranenko,G. Tarnai,R. Tieulent,A. Timilsina,T. Todoroki,M. Tomášek,C. L. Towell,R. S. Towell, I. Tserruya,Y. Ueda, B. Ujvari,H. W. van Hecke, J. Velkovska, M. Virius, V. Vrba,N. Vukman,X. R. Wang,Y. S. Watanabe, C. P. Wong, C. L. Woody,C. Xu,Q. Xu,L. Xue,S. Yalcin,Y. L. Yamaguchi,H. Yamamoto, A. Yanovich,J. H. Yoo,I. Yoon,H. Yu, I. E. Yushmanov, W. A. Zajc,A. Zelenski, S. Zharko,L. Zou

Physical Review Letters(2018)

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摘要
PHENIX has measured the azimuthal correlations of muon pairs from charm and bottom semi-leptonic decays in p+p collisions at √(s)=200 GeV, using a novel analysis technique utilizing both unlike- and like-sign muon pairs to separate charm, bottom and Drell-Yan contributions. The dimuon measurements combined with the previous electron-muon and dielectron measurements span a wide range in rapidity, and are well described by PYTHIA Tune A. Through a Bayesian analysis based on PYTHIA Tune A, we show that leading order pair creation is the dominant (76%±^14_19%) contribution for bb̅ production, whereas the data favor the scenario in which next-to-leading-order processes dominate cc̅ production. The small contribution of next-to-leading-order processes in bb̅ production at the collision energies of the Relativistic Heavy Ion Collider contrasts with the case at Large-Hadron-Collider energies, where next-to-leading-order processes are expected to dominate.
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