Abstract
The beauty production cross section for deep inelastic scattering events with at least one hard jet in the Breit frame together with a muon has been measured, for photon virtualities Q2>2 GeV2, with the ZEUS detector at HERA using integrated luminosity of 72 pb−1. The total visible cross section is σbb¯(ep→e jet μX)=40.9±5.7(stat.)−4.4+6.0(syst.) pb. The next-to-leading order QCD prediction lies about 2.5 standard deviations below the data. The differential cross sections are in general consistent with the NLO QCD predictions; however at low values of Q2, Bjorken x, and muon transverse momentum, and high values of jet transverse energy and muon pseudorapidity, the prediction is about two standard deviations below the data.
Highlights
On leave of absence at The National Science Foundation, Arlington, VA, USA
The data used in this measurement were collected during the 1999–2000 HERA running period, where a proton beam of 920 GeV collided with a positron or electron beam of 27.5 GeV, corresponding to a centreof-mass energy of 318 GeV
The resulting small-angle energetic photons were measured by the luminosity monitor [14], a lead-scintillator calorimeter placed in the HERA tunnel at Z = −107 m
Summary
Department of Engineering in Management and Finance, University of Aegean, Greece T. Carli, T. Gosau, U. Holm, N. Krumnack, E. Lohrmann, M. Milite, H. Salehi, P. Schleper, T. Schörner-Sadenius, S. Stonjek 13, K. Wichmann, K. Wick, A. Ziegler, Ar. Ziegler Imperial College London, High Energy Nuclear Physics Group, London, United Kingdom 44 Institute of Physics and Technology of Ministry of Education and Science of Kazakhstan, Almaty, Kazakhstan Kyungpook National University, Center for High Energy Physics, Daegu, South Korea 38 Institut de Physique Nucléaire, Université Catholique de Louvain, Louvain-la-Neuve, Belgium F. Barreiro, C. Glasman 18, O. González, L. Labarga, J. del Peso, E. Tassi, J. Terrón, M. Zambrana Departamento de Física Teórica, Universidad Autónoma de Madrid, Madrid, Spain 43 R.K. Dementiev, P.F. Ermolov, I.I. Katkov, L.A. Khein, I.A. Korzhavina, V.A. Kuzmin, B.B. Levchenko, O.Yu. Lukina, A.S. Proskuryakov, L.M. Shcheglova, S.A. Zotkin N. Coppola, G. Grigorescu, S. Grijpink, A. Keramidas, E. Koffeman, P. Kooijman, E. Maddox, A. Pellegrino, S. Schagen, H. Tiecke, M. Vázquez, L. Wiggers, E. de Wolf A.M. Cooper-Sarkar, A. Cottrell, R.C.E. Devenish, B. Foster, G. Grzelak, C. Gwenlan 19, T. Kohno, S. Patel, P.B. Straub, R. Walczak P. Bellan, A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, S. Dusini, A. Garfagnini, S. Limentani, A. Longhin, A. Parenti, M. Posocco, L. Stanco, M. Turcato Department of Physics, Pennsylvania State University, University Park, PA 16802, USA 46
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
