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Measurement of Bottom versus Charm as a Function of Transverse Momentum with Electron-Hadron Correlations in p+p Collisions at sqrt(s)=200 GeV

A. Adare S. Afanasiev C. Aidala N.N. Ajitanand Y. Akiba H. Al-Bataineh J. Alexander K. Aoki Laurent Aphecetche 1 R. Armendariz S.H. Aronson J. Asai E. T. Atomssa R. Averbeck T.C. Awes B. Azmoun V. Babintsev M. Bai G. Baksay L. Baksay A. Baldisseri 2 K.N. Barish P.D. Barnes B. Bassalleck A.T. Basye S. Bathe S. Batsouli V. Baublis C. Baumann A. Bazilevsky S. Belikov R. Bennett A. Berdnikov Y. Berdnikov A.A. Bickley J.G. Boissevain H. Borel 2 K. Boyle M.L. Brooks H. Buesching V. Bumazhnov G. Bunce S. Butsyk C. Muñoz Camacho S. Campbell B.S. Chang W.C. Chang J.-L. Charvet 2 S. Chernichenko J. Chiba C.Y. Chi M. Chiu I.J. Choi R.K. Choudhury T. Chujo P. Chung A. Churyn V. Cianciolo Z. Citron C.R. Cleven B.A. Cole M.P. Comets P. Constantin M. Csanad T. Csorgo T. Dahms S. Dairaku K. Das G. David M.B. Deaton K. Dehmelt H. Delagrange 1 A. Denisov D. d'Enterria A. Deshpande E.J. Desmond O. Dietzsch A. Dion M. Donadelli O. Drapier A. Drees K.A. Drees A.K. Dubey A. Durum D. Dutta V. Dzhordzhadze Y.V. Efremenko J. Egdemir F. Ellinghaus W.S. Emam T. Engelmore A. Enokizono H. Enyo S. Esumi K.O. Eyser B. Fadem D.E. Fields M. Finger Jr. M. Finger F. Fleuret S.L. Fokin Z. Fraenkel J.E. Frantz A. Franz A.D. Frawley K. Fujiwara Y. Fukao T. Fusayasu S. Gadrat 3 I. Garishvili A. Glenn H. Gong M. Gonin J. Gosset 2 Y. Goto R. Granier de Cassagnac N. Grau S.V. Greene M. Grosse Perdekamp T. Gunji H.-A. Gustafsson T. Hachiya A. Hadj Henni 1 C. Haegemann J.S. Haggerty H. Hamagaki R. Han H. Harada E.P. Hartouni K. Haruna E. Haslum R. Hayano M. Heffner T.K. Hemmick T. Hester X. He H. Hiejima J.C. 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.V. Jacak J. Jia J. Jin O. Jinnouchi B.M. Johnson K.S. Joo D. Jouan 4 F. Kajihara S. Kametani N. Kamihara J. Kamin M. Kaneta J.H. Kang H. Kanou J. Kapustinsky D. Kawall A.V. Kazantsev T. Kempel A. Khanzadeev K.M. Kijima J. Kikuchi B.I. Kim D.H. Kim D.J. Kim E. Kim S.H. 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. Kral A. Kravitz J. Kubart G.J. Kunde N. Kurihara K. Kurita M. Kurosawa M.J. Kweon Y. Kwon G.S. Kyle R. Lacey Y.-S. Lai Y.S. Lai J.G. Lajoie D. Layton A. Lebedev D.M. Lee K.B. Lee M.K. Lee T. Lee M.J. Leitch M.A.L. Leite B. Lenzi P. Liebing T. Liˇska A. Litvinenko Hong Liu M.X. Liu X. Li B. Love D. Lynch C.F. Maguire Y.I. Makdisi A. Malakhov M.D. Malik V.I. Manko E. Mannel Y. Mao L. Masek H. Masui F. Matathias M. Mccumber P.L. Mcgaughey N. Means B. Meredith Y. Miake P. Mikes K. Miki T.E. Miller A. Milov S. Mioduszewski M. Mishra J.T. Mitchell M. Mitrovski A.K. Mohanty Y. Morino A. Morreale D.P. Morrison T.V. Moukhanova D. Mukhopadhyay J. Murata S. Nagamiya Y. Nagata J.L. Nagle M. Naglis M.I. Nagy I. Nakagawa Y. Nakamiya T. Nakamura K. Nakano J. Newby M. Nguyen T. Niita B.E. Norman R. Nouicer A.S. Nyanin E. O'Brien S.X. Oda C.A. Ogilvie H. Ohnishi H. Okada K. Okada M. Oka O.O. Omiwade Y. Onuki A. Oskarsson M. Ouchida K. Ozawa R. Pak D. Pal A.P.T. Palounek V. Pantuev V. Papavassiliou J. Park W.J. Park S.F. Pate H. Pei J.-C. Peng H. Pereira 2 V. Peresedov D.Yu. Peressounko C. Pinkenburg M.L. Purschke A.K. Purwar H. Qu J. Rak A. Rakotozafindrabe I. Ravinovich K.F. Read S. Rembeczki M. Reuter K. Reygers V. Riabov Y. Riabov D. Roach G. Roche 3 S.D. Rolnick A. Romana M. Rosati S.S.E. Rosendahl P. Rosnet 3 P. Rukoyatkin P. Ruzicka V.L. 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.Yu. 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.L. Silva D. Silvermyr C. Silvestre 2 K.S. Sim B.K. Singh C.P. Singh V. Singh S. Skutnik M. Slunecka A. Soldatov R.A. Soltz W.E. Sondheim S.P. Sorensen I.V. Sourikova F. Staley 2 P.W. Stankus E. Stenlund M. Stepanov A. Ster S.P. Stoll T. Sugitate C. Suire 4 A. Sukhanov J. Sziklai T. Tabaru S. Takagi E.M. Takagui A. Taketani R. Tanabe Y. Tanaka K. Tanida M.J. Tannenbaum A. Taranenko P. Tarjan H. Themann T.L. Thomas M. Togawa A. Toia J. Tojo L. Tomasek Y. Tomita H. Torii R.S. Towell V.-N. Tram I. Tserruya Y. Tsuchimoto C. Vale H. Valle H.W. van Hecke A. Veicht J. Velkovska R. Vertesi A.A. Vinogradov M. Virius V. Vrba E. Vznuzdaev M. Wagner D. Walker X.R. Wang Y. Watanabe F. Wei J. Wessels S.N. White D. Winter C.L. Woody M. Wysocki W. Xie Y.L. Yamaguchi K. Yamaura R. Yang A. Yanovich Z. Yasin J. Ying S. Yokkaichi G.R. Young I. Younus I.E. Yushmanov W.A. Zajc O. Zaudtke C. Zhang S. Zhou J. Zimanyi L. Zolin
Abstract : The momentum distribution of electrons from semi-leptonic decays of charm and bottom for mid-rapidity |y|<0.35 in p+p collisions at sqrt(s)=200 GeV is measured by the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) 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^bar --> 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 (FONLL) perturbative quantum chromodynamics (pQCD) calculation agrees with the data within the theoretical and experimental uncertainties. The extracted total bottom production cross section at this energy is \sigma_{b\b^bar}= 3.2 ^{+1.2}_{-1.1}(stat) ^{+1.4}_{-1.3}(syst) micro b.
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A. Adare, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, et al.. Measurement of Bottom versus Charm as a Function of Transverse Momentum with Electron-Hadron Correlations in p+p Collisions at sqrt(s)=200 GeV. Physical Review Letters, American Physical Society, 2009, 103, pp.082002. ⟨10.1103/PhysRevLett.103.082002⟩. ⟨in2p3-00533952⟩

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