Measurement of Beauty Photoproduction near Threshold using Di-electron Events with the H1 Detector at HERA

F.D. Aaron E. Barrelet 1 J.C. Bizot 2 V. Boudry 3 V. Brisson 2 B. Delcourt 2 C. Diaconu 4 J. Feltesse 5 M. Gouzevitch 6 M. Jacquet 2 F. Moreau 3 C. Pascaud 2 E. Perez 5 E. Sauvan 4 L. Schoeffel 5 A. Specka 3 T.H. Tran 2 C. Vallée 4 Zhen Zhang 2 F. Zomer 2 D. Hoffmann 4
1 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
2 LAL - Laboratoire de l'Accélérateur Linéaire
3 LLR - Laboratoire Leprince-Ringuet
4 CPPM - Centre de Physique des Particules de Marseille
5 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
6 IPNL - Institut de Physique Nucléaire de Lyon
Abstract : The cross section for ep -> e b\bar{b} X in photoproduction is measured with the H1 detector at the ep-collider HERA. The decay channel b\bar{b} -> ee X' is selected by identifying the semi-electronic decays of the b-quarks. The total production cross section is measured in the kinematic range given by the photon virtuality Q^2 <= 1 GeV^2, the inelasticity 0.05 <= y <= 0.65 and the pseudorapidity of the b-quarks |eta(b)|,|eta(\bar{b})| <= 2. The differential production cross section is measured as a function of the average transverse momentum of the beauty quarks down to the threshold. The results are compared to next-to-leading-order QCD predictions.
Document type :
Journal articles
European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2012, 72, pp.2148. <10.1140/epjc/s10052-012-2148-1>
http://hal.in2p3.fr/in2p3-00711464
Contributor : Sylvie Flores <>
Submitted on : Monday, June 25, 2012 - 8:17:06 AM
Last modification on : Wednesday, July 27, 2016 - 2:48:48 PM

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UPMC | CPPM | IPNL | LAL | LLR | LPNHE | X | PARISTECH | X-LLR | X-DEP-PHYS | UNIV-AMU | CEA | DSM-IRFU

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F.D. Aaron, E. Barrelet, J.C. Bizot, V. Boudry, V. Brisson, et al.. Measurement of Beauty Photoproduction near Threshold using Di-electron Events with the H1 Detector at HERA. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2012, 72, pp.2148. <10.1140/epjc/s10052-012-2148-1>. <in2p3-00711464>

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