Beauty production in pp collisions at √s = 2.76 TeV measured via semi-electronic decays

Abelev, B. and Antičić, Tome and Gotovac, Sven and Mundić, Eugen and Planinić, Mirko and Poljak, Nikola and Simatović, Goran and Šuša, Tatjana and Vicković, Linda and Zyzak, M. (ALICE Collaboration) (2014) Beauty production in pp collisions at √s = 2.76 TeV measured via semi-electronic decays. Physics Letters B, 738. pp. 97-108. ISSN 0370-2693

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The ALICE Collaboration at the LHC reports measurement of the inclusive production cross section of electrons from semi-leptonic decays of beauty hadrons with rapidity |y| < 0.8 and transverse momentum 1 < pT < 10 GeV/c, in pp collisions at √s = 2.76 TeV. Electrons not originating from semi-electronic decay of beauty hadrons are suppressed using the impact parameter of the corresponding tracks. The production cross section of beauty decay electrons is compared to the result obtained with an alternative method which uses the distribution of the azimuthal angle between heavy-flavour decay electrons and charged hadrons. Perturbative QCD predictions agree with the measured cross section within the experimental and theoretical uncertainties. The integrated visible cross section, σb→e = 3.47 ± 0.40(stat)+1.12−1.33(sys) ± 0.07(norm) μb, was extrapolated to full phase space using Fixed Order plus Next-to-Leading Log (FONLL) calculations to obtain the total bb production ¯ cross section, σbb¯ = 130 ± 15.1(stat) +42.1−49.8(sys)+3.4−3.1(extr) ± 2.5(norm) ± 4.4(BR) μb.

Item Type: Article
Keywords: pp collisions, single electrons, heavy-flavour production, beauty production, ALICE
Date: 10 November 2014
Subjects: NATURAL SCIENCES > Physics
Additional Information: © 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license ( Funded by SCOAP3. Received 29 May 2014. Received in revised form 14 August 2014. Accepted 10 September 2014. Available online 17 September 2014.
Divisions: Faculty of Science > Department of Physics
Project code: 098-0982887-2878, 119-0982887-1006
Publisher: Elsevier
Depositing User: Nikola Poljak
Date Deposited: 06 Feb 2015 19:13
Last Modified: 29 May 2016 20:34

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