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Measurement of Single Muons at Forward Rapidity in p+p Collisions at $\sqrt{s}$ = 200 GeV and Implications for Charm Production

S.S. Adler S. Afanasiev C. Aidala N.N. Ajitanand Y. Akiba J. Alexander R. Amirikas Laurent Aphecetche 1 S.H. Aronson R. Averbeck T.C. Awes R. Azmoun V. Babintsev A. Baldisseri 2 K.N. Barish P.D. Barnes B. Bassalleck S. Bathe S. Batsouli V. Baublis A. Bazilevsky S. Belikov Y. Berdnikov S. Bhagavatula J.G. Boissevain H. Borel 2 S. Borenstein 3 M.L. Brooks D.S. Brown N. Bruner D. Bucher H. Buesching V. Bumazhnov G. Bunce J.M. Burward-Hoy S. Butsyk X. Camard 1 J.-S. Chai P. Chand W.C. Chang S. Chernichenko C.Y. Chi J. Chiba M. Chiu I.J. Choi J. Choi R.K. Choudhury T. Chujo V. Cianciolo Y. Cobigo 2 B.A. Cole P. Constantin D. d'Enterria 1 G. David H. Delagrange 1 A. Denisov A. Deshpande E.J. Desmond A. Devismes O. Dietzsch O. Drapier 3 A. Drees K.A. Drees A. Durum D. Dutta Y.V. Efremenko K. El Chenawi A. Enokizono H. En'Yo S. Esumi L. Ewell D.E. Fields F. Fleuret 3 S.L. Fokin B.D. Fox Z. Fraenkel J.E. Frantz A. Franz A.D. Frawley S.-Y. Fung S. Garpman T.K. Ghosh A. Glenn G. Gogiberidze M. Gonin 3 J. Gosset 2 Y. Goto R. Granier de Cassagnac 3 N. Grau S.V. Greene M. Grosse Perdekamp W. Guryn H.-A. Gustafsson T. Hachiya J.S. Haggerty H. Hamagaki A.G. Hansen E.P. Hartouni M. Harvey R. Hayano N. Hayashi X. He M. Heffner T.K. Hemmick J.M. Heuser M. Hibino J.C. Hill W. Holzmann K. Homma B. Hong A. Hoover D. Hornback T. Ichihara V.V. Ikonnikov K. Imai D. Isenhower M. Ishihara M. Issah A. Isupov B.V. Jacak W.Y. Jang Y. Jeong J. Jia O. Jinnouchi B.M. Johnson S.C. Johnson K.S. Joo D. Jouan 4 S. Kametani N. Kamihara J.H. Kang S.S. Kapoor K. Katou Steven Kelly B. Khachaturov A. Khanzadeev J. Kikuchi D.H. Kim D.J. Kim D.W. Kim E. Kim G.-B. Kim 3 H.J. Kim E. Kistenev A. Kiyomichi K. Kiyoyama C. Klein-Boesing H. Kobayashi L. Kochenda V. Kochetkov D. Koehler T. Kohama M. Kopytine D. Kotchetkov A. Kozlov P.J. Kroon C.H. Kuberg K. Kurita Y. Kuroki M.J. Kweon Y. Kwon G.S. Kyle R. Lacey V. Ladygin J.G. Lajoie A. Lebedev S. Leckey D.M. Lee S. Lee M.J. Leitch X.H. Li H. Lim A. Litvinenko M.X. Liu Yehan Liu C.F. Maguire Y.I. Makdisi A. Malakhov V.I. Manko Y. Mao Gines Martinez Garcia 1 M.D. Marx H. Masui F. Matathias T. Matsumoto P.L. Mcgaughey E. Melnikov F. Messer Y. Miake J. Milan T.E. Miller A. Milov S. Mioduszewski R.E. Mischke G.C. Mishra J.T. Mitchell A.K. Mohanty D.P. Morrison J.M. Moss F. Muhlbacher D. Mukhopadhyay M. Muniruzzaman J. Murata S. Nagamiya J.L. Nagle T. Nakamura B.K. Nandi M. Nara J. Newby P. Nilsson A.S. Nyanin J. Nystrand E. O'Brien C.A. Ogilvie H. Ohnishi I.D. Ojha K. Okada M. Ono V. Onuchin A. Oskarsson I. Otterlund K. Oyama K. Ozawa D. Pal A.P.T. Palounek V. Pantuev V. Papavassiliou J. Park A. Parmar S.F. Pate T. Peitzmann J.-C. Peng V. Peresedov C. Pinkenburg R.P. Pisani F. Plasil M.L. Purschke A.K. Purwar J. Rak I. Ravinovich K.F. Read M. Reuter K. Reygers V. Riabov Y. Riabov G. Roche 5 A. Romana M. Rosati P. Rosnet 5 S.S. Ryu M.E. Sadler N. Saito T. Sakaguchi M. Sakai S. Sakai V. Samsonov L. Sanfratello R. Santo H.D. Sato S. Sato S. Sawada Y. Schutz 1 V. Semenov R. Seto M.R. Shaw T.K. Shea T.-A. Shibata K. Shigaki T. Shiina C.L. Silva D. Silvermyr K.S. Sim C.P. Singh V. Singh M. Sivertz 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 J.P. Sullivan E.M. Takagui A. Taketani M. Tamai K.H. Tanaka Y. Tanaka K. Tanida M.J. Tannenbaum P. Tarjan J.D. Tepe T.L. Thomas J. Tojo H. Torii R.S. Towell I. Tserruya H. Tsuruoka S.K. Tuli H. Tydesjo N. Tyurin J. Velkovska M. Velkovsky V. Veszpremi L. Villatte A.A. Vinogradov M.A. Volkov E. Vznuzdaev X.R. Wang Y. Watanabe S.N. White F.K. Wohn C.L. Woody W. Xie Y. Yang A. Yanovich S. Yokkaichi G.R. Young I.E. Yushmanov W.A. Zajc C. Zhang S. Zhou S.J. Zhou L. Zolin R. Durietz H.W. Vanhecke
Abstract : Muon production at forward rapidity (1.5 < |\eta| < 1.8) has been measured by the PHENIX experiment over the transverse momentum range 1 < p_T \le 3 GeV/c in sqrt(s) = 200 GeV p+p collisions at the Relativistic Heavy Ion Collider. After statistically subtracting contributions from light hadron decays an excess remains which is attributed to the semileptonic decays of hadrons carrying heavy flavor, i.e. charm quarks or, at high p_T, bottom quarks. The resulting muon spectrum from heavy flavor decays is compared to PYTHIA and a next-to-leading order perturbative QCD calculation. PYTHIA is used to determine the charm quark spectrum that would produce the observed muon excess. The corresponding differential cross section for charm quark production at forward rapidity is determined to be d\sigma_(c c^bar)/dy|_(y=1.6)=0.243 +/- 0.013 (stat.) +/- 0.105 (data syst.) ^(+0.049)_(-0.087) (PYTHIA syst.) mb.
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Submitted on : Friday, November 16, 2007 - 11:07:48 AM
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S.S. Adler, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, et al.. Measurement of Single Muons at Forward Rapidity in p+p Collisions at $\sqrt{s}$ = 200 GeV and Implications for Charm Production. Physical Review D, American Physical Society, 2007, 76, pp.092002. ⟨10.1103/PhysRevD.76.092002⟩. ⟨in2p3-00188259⟩

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