Prompt charm production in pp collisions at sqrt(s)=7 TeV

• Published in: arXiv.org
• Main Authors: collaboration, LHCb, Alves, A A, Amato, S, Archilli, F, Artamonov, A, Back, J J, Bediaga, I, M van Beuzekom, Blanc, F, Bocci, V, Brook, N H, Cardini, A, Chiapolini, N, Cowan, G A, De Cian, M, De Paula, L, Dogaru, M, Easo, S, Egede, U, Eidelman, S, Eitschberger, U, I El Rifai, Elsasser, Ch, Ferguson, D, Gandelman, M, Garrido, L, Gligorov, V V, Gomes, A, Hadjivasiliou, C, Haefeli, G, Hulsbergen, W, Kreplin, K, Krocker, G, Lanciotti, E, J -P Lees, Leflat, A, Lopez-March, N, Luisier, J, Luo, H, Martellotti, G, D Martinez Santos, Maurice, E, McCarthy, J, Meier, F, Müller, K, Muryn, B, Nasteva, I, Neufeld, N, Nguyen, A D, Nguyen, T D, Nicol, M, Nikodem, T, Novoselov, A, Okhrimenko, O, Owen, P, Palutan, M, Patel, M, A Pazos Alvarez, Pellegrino, A, M Pepe Altarelli, Pérez-Calero Yzquierdo, A, Pietrzyk, B, Pinci, D, Polok, G, Poluektov, A, Popov, D, Potterat, C, Redford, S, V Rives Molina, A Romero Vidal, Ruiz, H, Sail, P, Saitta, B, Sannino, M, Sarti, A, Sciubba, A, Semennikov, A, Shears, T, Shevchenko, O, Shevchenko, V, R Silva Coutinho, Soler, F J P, Soomro, F, Stagni, F, Szczekowski, M, Szumlak, T, T'Jampens, S, Teodorescu, E, Torr, N, Tourneur, S, Tran, M T, Vecchi, S, Vieira, D, C Vo\ss, Wallace, R, Websdale, D, Yuan, X, Yushchenko, O, Zangoli, M, Zhang, Y
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 12.02.2013
• Subjects: Charm (particle physics); Collisions; Cross-sections; Hadrons; Luminosity; Physics - High Energy Physics - Experiment; Transverse momentum
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1302.2864

Charm production at the LHC in pp collisions at sqrt(s)=7 TeV is studied with the LHCb detector. The decays D0 -> K- pi+, D+ -> K- pi+ pi+, D*+ -> D0(K- pi+) pi+, D_s+ -> phi(K- K+) pi+, Lambda_c+ -> p K- pi+, and their charge conjugates are analysed in a data set corresponding to an integrated luminosity of 15 nb^{-1}. Differential cross-sections dsigma/dp_T are measured for prompt production of the five charmed hadron species in bins of transverse momentum and rapidity in the region 0 < p_T < 8 GeV/c and 2.0 < y < 4.5. Theoretical predictions are compared to the measured differential cross-sections. The integrated cross-sections of the charm hadrons are computed in the above p_T-y range, and their ratios are reported. A combination of the five integrated cross-section measurements gives sigma(c\bar{c})_{p_T < 8 GeV/c, 2.0 < y < 4.5} = 1419 +/- 12 (stat) +/- 116 (syst) +/- 65 (frag) microbarn, where the uncertainties are statistical, systematic, and due to the fragmentation functions.