/ Experiment-HEP arXiv:0802.0050


Dilepton mass spectra in p+p collisions at s**(1/2) = 200-GeV and the contribution from open charm


Adare, A. (Colorado U.) ; Afanasiev, S. (Dubna, JINR) ; Aidala, C. (Nevis Labs, Columbia U.) ; Ajitanand, N.N. (SUNY, Stony Brook, Chem. Dept.) ; Akiba, Y. (RIKEN BNL) ; Al-Bataineh, H. (New Mexico State U.) ; Alexander, J. (SUNY, Stony Brook, Chem. Dept.) ; Aoki, K. (Wako, RIKEN) ; Aphecetche, L. (SUBATECH, Nantes) ; Armendariz, R. (New Mexico State U.) ; Aronson, S.H. (Brookhaven) ; Asai, J. (RIKEN BNL) ; Atomssa, E.T. (Ecole Polytechnique) ; Averbeck, R. (SUNY, Stony Brook) ; Awes, T.C. (Oak Ridge) ; Azmoun, B. (Brookhaven) ; Babintsev, V. (Serpukhov, IHEP) ; Baksay, G. (Florida Inst. Tech.) ; Baksay, L. (Florida Inst. Tech.) ; Baldisseri, A. (DAPNIA, Saclay) ; Barish, K.N. (UC, Riverside) ; Barnes, P.D. (Los Alamos) ; Bassalleck, B. (New Mexico U.) ; Bathe, S. (UC, Riverside) ; Batsouli, S. (Oak Ridge) ; Baublis, V. (St. Petersburg, INP) ; Bazilevsky, A. (Brookhaven) ; Belikov, S. (Brookhaven) ; Bennett, R. (SUNY, Stony Brook) ; Berdnikov, Y. (St. Petersburg Polytechnic Inst.) ; Bickley, A.A. (Colorado U.) ; Boissevain, J.G. (Los Alamos) ; Borel, H. (DAPNIA, Saclay) ; Boyle, K. (SUNY, Stony Brook) ; Brooks, M.L. (Los Alamos) ; Buesching, H. (Brookhaven) ; Bumazhnov, V. (Serpukhov, IHEP) ; Bunce, G. (RIKEN BNL) ; Butsyk, S. (SUNY, Stony Brook) ; Campbell, S. (SUNY, Stony Brook) ; Chang, B.S. (IPAP, Seoul) ; Charvet, J.L. (DAPNIA, Saclay) ; Chernichenko, S. (Serpukhov, IHEP) ; Chiba, J. (KEK, Tsukuba) ; Chi, C.Y. (Nevis Labs, Columbia U.) ; Chiu, M. (Illinois U., Urbana) ; Choi, I.J. (IPAP, Seoul) ; Chujo, T. (Vanderbilt U.) ; Chung, P. (SUNY, Stony Brook, Chem. Dept.) ; Churyn, A. (Serpukhov, IHEP) ; Cianciolo, V. (Oak Ridge) ; Cleven, C.R. (Georgia State U.) ; Cole, B.A. (Nevis Labs, Columbia U.) ; Comets, M.P. (Orsay, IPN) ; Constantin, P. (Los Alamos) ; Csanad, M. (Eotvos U.) ; Csorgo, T. (Korea U.) ; Dahms, T. (SUNY, Stony Brook) ; Das, K. (Florida State U.) ; David, G. (Brookhaven) ; Deaton, M.B. (Abilene Christian U.) ; Dehmelt, K. (Florida Inst. Tech.) ; Delagrange, H. (SUBATECH, Nantes) ; Denisov, A. (Serpukhov, IHEP) ; d'Enterria, D. (Nevis Labs, Columbia U.) ; Deshpande, A. (SUNY, Stony Brook) ; Desmond, E.J. (Brookhaven) ; Dietzsch, O. (Sao Paulo U.) ; Dion, A. (SUNY, Stony Brook) ; Donadelli, M. (Sao Paulo U.) ; Drapier, O. (Ecole Polytechnique) ; Drees, A. (SUNY, Stony Brook) ; Dubey, A.K. (Weizmann Inst.) ; Durum, A. (Serpukhov, IHEP) ; Dzhordzhadze, V. (UC, Riverside) ; Efremenko, Y.V. (Oak Ridge) ; Egdemir, J. (SUNY, Stony Brook) ; Ellinghaus, F. (Colorado U.) ; Emam, W.S. (UC, Riverside) ; Enokizono, A. (LLNL, Livermore) ; En'yo, H. (RIKEN BNL) ; Esumi, S. (Tsukuba U.) ; Eyser, K.O. (UC, Riverside) ; Fields, D.E. (RIKEN BNL) ; Finger, M. (Dubna, JINR) ; Finger, M.Jr. (Dubna, JINR) ; Fleuret, F. (Ecole Polytechnique) ; Fokin, S.L. (Kurchatov Inst., Moscow) ; Fraenkel, Z. (Weizmann Inst.) ; Frantz, J.E. (SUNY, Stony Brook) ; Franz, A. (Brookhaven) ; Frawley, A.D. (Florida State U.) ; Fujiwara, K. (Wako, RIKEN) ; Fukao, Y. (Wako, RIKEN) ; Fusayasu, T. (Nagasaki Inst. Appl. Sci.) ; Gadrat, S. (Clermont-Ferrand U.) ; Garishvili, I. (Tennessee U.) ; Glenn, A. (Colorado U.) ; Gong, H. (SUNY, Stony Brook) ; Gonin, M. (Ecole Polytechnique) ; Gosset, J. (DAPNIA, Saclay) ; Goto, Y. (RIKEN BNL) ; Granier de Cassagnac, R. (Ecole Polytechnique) ; Grau, N. (Iowa State U.) ; Greene, S.V. (Vanderbilt U.) ; Grosse Perdekamp, M. (RIKEN BNL) ; Gunji, T. (Tokyo U., CNS) ; Gustafsson, H.A. (Lund U.) ; Hachiya, T. (Hiroshima U.) ; Hadj Henni, A. (SUBATECH, Nantes) ; Haegemann, C. (New Mexico U.) ; Haggerty, J.S. (Brookhaven) ; Hamagaki, H. (Tokyo U., CNS) ; Han, R. (Peking U.) ; Harada, H. (Hiroshima U.) ; Hartouni, E.P. (LLNL, Livermore) ; Haruna, K. (Hiroshima U.) ; Haslum, E. (Lund U.) ; Hayano, R. (Tokyo U., CNS) ; Heffner, M. (LLNL, Livermore) ; Hemmick, T.K. (SUNY, Stony Brook) ; Hester, T. (UC, Riverside) ; He, X. (Georgia State U.) ; Hiejima, H. (Illinois U., Urbana) ; Hill, J.C. (Iowa State U.) ; Hobbs, R. (New Mexico U.) ; Hohlmann, M. (Florida Inst. Tech.) ; Holzmann, W. (SUNY, Stony Brook, Chem. Dept.) ; Homma, K. (Hiroshima U.) ; Hong, B. (Korea U.) ; Horaguchi, T. (Tokyo Inst. Tech.) ; Hornback, D. (Tennessee U.) ; Ichihara, T. (RIKEN BNL) ; Imai, K. (Wako, RIKEN) ; Inaba, M. (Tsukuba U.) ; Inoue, Y. (Wako, RIKEN) ; Isenhower, D. (Abilene Christian U.) ; Isenhower, L. (Abilene Christian U.) ; Ishihara, M. (Wako, RIKEN) ; Isobe, T. (Tokyo U., CNS) ; Issah, M. (SUNY, Stony Brook, Chem. Dept.) ; Isupov, A. (Dubna, JINR) ; Jacak, B.V. (SUNY, Stony Brook) ; Ji, J. (Nagasaki Inst. Appl. Sci.) ; Jin, J. (Nevis Labs, Columbia U.) ; Jinnouchi, O. (RIKEN BNL) ; Johnson, B.M. (Brookhaven) ; Joo, K.S. (Myong Ji U.) ; Jouan, D. (Orsay, IPN) ; Kajihara, F. (Tokyo U., CNS) ; Kametani, S. (Waseda U., RISE) ; Kamihara, N. (Wako, RIKEN) ; Kamin, J. (SUNY, Stony Brook) ; Kaneta, M. (RIKEN BNL) ; Kang, J.H. (IPAP, Seoul) ; Kanou, H. (Tokyo Inst. Tech.) ; Kawall, D. (RIKEN BNL) ; Kazantsev, A.V. (Kurchatov Inst., Moscow) ; Khanzadeev, A. (St. Petersburg, INP) ; Kikuchi, J. (Waseda U., RISE) ; Kim, D.H. (Myong Ji U.) ; Kim, D.J. (IPAP, Seoul) ; Kim, E. (Seoul Natl. U.) ; Kinney, E. (Colorado U.) ; Kiss, A. (Eotvos U.) ; Kistenev, E. (Brookhaven) ; Kiyomichi, A. (Wako, RIKEN) ; Klay, J. (LLNL, Livermore) ; Klein-Boesing, C. (Munster U.) ; Kochenda, L. (St. Petersburg, INP) ; Kochetkov, V. (Serpukhov, IHEP) ; Komkov, B. (St. Petersburg, INP) ; Konno, M. (Tsukuba U.) ; Kotchetkov, D. (UC, Riverside) ; Kozlov, A. (Weizmann Inst.) ; Kral, A. (Prague, Tech. U.) ; Kravitz, A. (Nevis Labs, Columbia U.) ; Kubart, J. (Prague, Inst. Phys.) ; Kunde, G.J. (Los Alamos) ; Kurihara, N. (Tokyo U., CNS) ; Kurita, K. (Wako, RIKEN) ; Kweon, M.J. (Korea U.) ; Kwon, Y. (IPAP, Seoul) ; Kyle, G.S. (New Mexico State U.) ; Lacey, R. (SUNY, Stony Brook, Chem. Dept.) ; Lai, Y.S. (Nevis Labs, Columbia U.) ; Lajoie, J.G. (Iowa State U.) ; Lebedev, A. (Iowa State U.) ; Lee, D.M. (Los Alamos) ; Lee, M.K. (IPAP, Seoul) ; Lee, T. (Seoul Natl. U.) ; Leitch, M.J. (Los Alamos) ; Leite, M.A.L. (Sao Paulo U.) ; Lenzi, B. (Sao Paulo U.) ; Liska, T. (Prague, Tech. U.) ; Litvinenko, A. (Dubna, JINR) ; Liu, M.X. (Los Alamos) ; Li, X. (Beijing, Inst. Atomic Energy) ; Love, B. (Vanderbilt U.) ; Lynch, D. (Brookhaven) ; Maguire, C.F. (Vanderbilt U.) ; Makdisi, Y.I. (Brookhaven) ; Malakhov, A. (Dubna, JINR) ; Malik, M.D. (New Mexico U.) ; Manko, V.I. (Kurchatov Inst., Moscow) ; Mao, Y. (Wako, RIKEN) ; Masek, L. (Prague, Inst. Phys.) ; Masui, H. (Tsukuba U.) ; Matathias, F. (Nevis Labs, Columbia U.) ; McCumber, M. (SUNY, Stony Brook) ; McGaughey, P.L. (Los Alamos) ; Miake, Y. (Tsukuba U.) ; Mikes, P. (Prague, Inst. Phys.) ; Miki, K. (Tsukuba U.) ; Miller, T.E. (Vanderbilt U.) ; Milov, A. (SUNY, Stony Brook) ; Mioduszewski, S. (Brookhaven) ; Mishra, M. (Banaras Hindu U.) ; Mitchell, J.T. (Brookhaven) ; Mitrovski, M. (SUNY, Stony Brook, Chem. Dept.) ; Morreale, A. (UC, Riverside) ; Morrison, D.P. (Brookhaven) ; Moukhanova, T.V. (Kurchatov Inst., Moscow) ; Mukhopadhyay, D. (Vanderbilt U.) ; Murata, J. (Wako, RIKEN) ; Nagamiya, S. (KEK, Tsukuba) ; Nagata, Y. (Tsukuba U.) ; Nagle, J.L. (Colorado U.) ; Naglis, M. (Weizmann Inst.) ; Nakagawa, I. (RIKEN BNL) ; Nakamiya, Y. (Hiroshima U.) ; Nakamura, T. (Hiroshima U.) ; Nakano, K. (Tokyo Inst. Tech.) ; Newby, J. (LLNL, Livermore) ; Nguyen, M. (SUNY, Stony Brook) ; Norman, B.E. (Los Alamos) ; Nyanin, A.S. (Kurchatov Inst., Moscow) ; O'Brien, E. (Brookhaven) ; Oda, S.X. (Tokyo U., CNS) ; Ogilvie, C.A. (Iowa State U.) ; Ohnishi, H. (Wako, RIKEN) ; Okada, H. (Wako, RIKEN) ; Okada, K. (RIKEN BNL) ; Oka, M. (Tsukuba U.) ; Omiwade, O.O. (Abilene Christian U.) ; Oskarsson, A. (Lund U.) ; Ouchida, M. (Hiroshima U.) ; Ozawa, K. (Tokyo U., CNS) ; Pak, R. (Brookhaven) ; Pal, D. (Vanderbilt U.) ; Palounek, A.P.T. (Los Alamos) ; Pantuev, V. (SUNY, Stony Brook) ; Papavassiliou, V. (New Mexico State U.) ; Park, J. (Seoul Natl. U.) ; Park, W.J. (Korea U.) ; Pate, S.F. (New Mexico State U.) ; Pei, H. (Iowa State U.) ; Peng, J.C. (Illinois U., Urbana) ; Pereira, H. (DAPNIA, Saclay) ; Peresedov, V. (Dubna, JINR) ; Peressounko, D.Yu. (Kurchatov Inst., Moscow) ; Pinkenburg, C. (Brookhaven) ; Purschke, M.L. (Brookhaven) ; Purwar, A.K. (Los Alamos) ; Qu, H. (Georgia State U.) ; Rak, J. (New Mexico U.) ; Rakotozafindrabe, A. (Ecole Polytechnique) ; Ravinovich, I. (Weizmann Inst.) ; Read, K.F. (Tennessee U.) ; Rembeczki, S. (Florida Inst. Tech.) ; Reuter, M. (SUNY, Stony Brook) ; Reygers, K. (Munster U.) ; Riabov, V. (St. Petersburg, INP) ; Riabov, Y. (St. Petersburg, INP) ; Roche, G. (Clermont-Ferrand U.) ; Romana, A. (Ecole Polytechnique) ; Rosati, M. (Iowa State U.) ; Rosendahl, S.S.E. (Lund U.) ; Rosnet, P. (Clermont-Ferrand U.) ; Rukoyatkin, P. (Dubna, JINR) ; Rykov, V.L. (Wako, RIKEN) ; Sahlmueller, B. (Munster U.) ; Saito, N. (RIKEN BNL) ; Sakaguchi, T. (Brookhaven) ; Sakai, S. (Tsukuba U.) ; Sakata, H. (Hiroshima U.) ; Samsonov, V. (St. Petersburg, INP) ; Sato, S. (KEK, Tsukuba) ; Sawada, S. (KEK, Tsukuba) ; Seele, J. (Colorado U.) ; Seidl, R. (Illinois U., Urbana) ; Semenov, V. (Serpukhov, IHEP) ; Seto, R. (UC, Riverside) ; Sharma, D. (Weizmann Inst.) ; Shein, I. (Serpukhov, IHEP) ; Shevel, A. (SUNY, Stony Brook, Chem. Dept.) ; Shibata, T.A. (Tokyo Inst. Tech.) ; Shigaki, K. (Hiroshima U.) ; Shimomura, M. (Tsukuba U.) ; Shoji, K. (Wako, RIKEN) ; Sickles, A. (SUNY, Stony Brook) ; Silva, C.L. (Sao Paulo U.) ; Silvermyr, D. (Oak Ridge) ; Silvestre, C. (DAPNIA, Saclay) ; Sim, K.S. (Korea U.) ; Singh, C.P. (Banaras Hindu U.) ; Singh, V. (Banaras Hindu U.) ; Skutnik, S. (Iowa State U.) ; Slunecka, M. (Dubna, JINR) ; Soldatov, A. (Serpukhov, IHEP) ; Soltz, R.A. (LLNL, Livermore) ; Sondheim, W.E. (Los Alamos) ; Sorensen, S.P. (Tennessee U.) ; Sourikova, I.V. (Brookhaven) ; Staley, F. (DAPNIA, Saclay) ; Stankus, P.W. (Oak Ridge) ; Stenlund, E. (Lund U.) ; Stepanov, M. (New Mexico State U.) ; Ster, A. (Budapest, RMKI) ; Stoll, S.P. (Brookhaven) ; Sugitate, T. (Hiroshima U.) ; Suire, C. (Orsay, IPN) ; Sziklai, J. (Budapest, RMKI) ; Tabaru, T. (RIKEN BNL) ; Takagi, S. (Tsukuba U.) ; Takagui, E.M. (Sao Paulo U.) ; Taketani, A. (RIKEN BNL) ; Tanaka, Y. (Nagasaki Inst. Appl. Sci.) ; Tanida, K. (RIKEN BNL) ; Tannenbaum, M.J. (Brookhaven) ; Taranenko, A. (SUNY, Stony Brook, Chem. Dept.) ; Tarjan, P. (Kossuth Lajos U., Debrecen) ; Thomas, T.L. (New Mexico U.) ; Togawa, M. (Wako, RIKEN) ; Toia, A. (SUNY, Stony Brook) ; Tojo, J. (Wako, RIKEN) ; Tomasek, L. (Prague, Inst. Phys.) ; Torii, H. (Wako, RIKEN) ; Towell, R.S. (Abilene Christian U.) ; Tram, V.N. (Ecole Polytechnique) ; Tserruya, I. (Weizmann Inst.) ; Tsuchimoto, Y. (Hiroshima U.) ; Vale, C. (Iowa State U.) ; Valle, H. (Vanderbilt U.) ; van Hecke, H.W. (Los Alamos) ; Velkoska, J. (Vanderbilt U.) ; Vertesi, R. (Kossuth Lajos U., Debrecen) ; Vinogradov, A.A. (Kurchatov Inst., Moscow) ; Virius, M. (Prague, Tech. U.) ; Vrba, V. (Prague, Inst. Phys.) ; Vznuzdaev, E. (St. Petersburg, INP) ; Wagner, M. (Wako, RIKEN) ; Walker, D. (SUNY, Stony Brook) ; Wang, X.R. (New Mexico State U.) ; Watanabe, Y. (RIKEN BNL) ; Wessels, J. (Munster U.) ; White, S.N. (Brookhaven) ; Winter, D. (Nevis Labs, Columbia U.) ; Woody, C.L. (Brookhaven) ; Wysocki, M. (Colorado U.) ; Xie, W. (RIKEN BNL) ; Yamaguchi, Y.L. (Waseda U., RISE) ; Yanovich, A. (Serpukhov, IHEP) ; Yasin, Z. (UC, Riverside) ; Ying, J. (Georgia State U.) ; Yokkaichi, S. (RIKEN BNL) ; Young, G.R. (Oak Ridge) ; Younus, I. (New Mexico U.) ; Yushmanov, I.E. (Kurchatov Inst., Moscow) ; Zajc, W.A. (Nevis Labs, Columbia U.) ; Zaudtke, O. (Munster U.) ; Zhang, C. (Oak Ridge) ; Zhou, S. (Beijing, Inst. Atomic Energy) ; Zimanyi, J. (Budapest, RMKI) ; Zolin, L. (Dubna, JINR)

Published in: Phys.Lett.
Year: 2009
Vol.: B670
Page No: 313-320
Pages: 18

Abstract: The PHENIX experiement has measured the electron-positron pair mass spectrum from 0 to 8 GeV/c^2 in p+p collisions at sqrt(s)=200 GeV. The contributions from light meson decays to e^+e^- pairs have been determined based on measurements of hadron production cross sections by PHENIX. They account for nearly all e^+e^- pairs in the mass region below 1 GeV/c^2. The e^+e^- pair yield remaining after subtracting these contributions is dominated by semileptonic decays of charmed hadrons correlated through flavor conservation. Using the spectral shape predicted by PYTHIA, we estimate the charm production cross section to be 544 +/- 39(stat) +/- 142(syst) +/- 200(model) \mu b, which is consistent with QCD calculations and measurements of single leptons by PHENIX.

Web-Page: http://inspirebeta.net/record/778611/files/fig1.png; http://inspirebeta.net/record/778611/files/fig2.png; http://inspirebeta.net/record/778611/files/fig3.png; http://inspirebeta.net/record/778611/files/fig4.png

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