Measurement of electrons from beauty hadron decays in pp collisions at sqrt{s} = 7 TeV

B I Abelev,N Arbor,G Conesa Balbastre,J Faivre,C Furget,R Guernane,S Kox,J S Real,C Silvestre,R Vernet,I Belikov, B Hippolyte,C Kuhn, C Roy,X Sanchez Castro,S Senyukov,L Aphecetche,G Batigne, E Bergognon,M Bregant,H Delagrange,Olga Driga,B Erazmus, M Estienne,M Germain,Antoine Xavier Lardeux,F Lefevre,L Luquin,G Martinez Garcia,A Mas,L Massacrier,A Matyja,P Pillot,Y Schutz, A Shabetai,D Stocco,Y W Baek,A Baldit,V Barret,N Bastid,Philippe Crochet,P Dupieux,R Ichou,X Lopez,F Manso,Massimiliano Marchisone, S Porteboeufhoussais, P Rosnet,B Vulpescu,Xiaoming Zhang,C Cheshkov,B Cheynis,L Ducroux,M Guilbaud,R Tieulent,A Uras,B Boyer,Indraneil Das,B Espagnon, C Hadjidakis,I Hřivnacova,Igor Lakomov,Y Le Bornec, C Suire,J D Tapia Takaki,L Valencia Palomo

PHYSICS LETTERS B（2013）

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摘要

The production cross section of electrons from semileptonic decays of beauty hadrons was measured at mid-rapidity (vertical bar y vertical bar < 0.8) in, the transverse momentum range 1 < p(T) < 8 GeV/c with the ALICE experiment at the CERN LHC in pp collisions at a center of mass energy root s = 7 TeV using an integrated luminosity of 2.2 nb(-1). Electrons from beauty hadron decays were selected based on the displacement of the decay vertex from the collision vertex. A perturbative QCD calculation agrees with the measurement within uncertainties. The data were extrapolated to the full phase space to determine the total cross section for the production of beauty quark-antiquark pairs. (C) 2013 CERN. Published by Elsevier B.V. All rights reserved.

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关键词

LHC,ALICE experiment,pp collisions,Single electrons,Heavy flavor production,Beauty production

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