Measurement of the B ± production cross-section in pp collisions at $ \sqrt {s} $ = 7 TeV

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Reis,S Oggero,S Topp-Joergensen,T Gys,P Perret,G Valenti,T Britton,N Sagidova,S Ogilvy,I Shapoval,G Wilkinson,G Haefeli,J Serrano,T Kvaratskheliya,U Marconi,S Stahl,M John,R S Huston,F Zhang,E Graugés,G Mancinelli,N Mangiafave,R Young,G Carboni,D Vieira,F Alessio,C Blanks,D Hutchcroft,R Schwemmer,M Whitehead,D Golubkov,E Picatoste Olloqui,P Robbe,A Solomin,R Oldeman,T Bird,A Dosil Suárez,L Zhang,D Elsby,V N La Thi,A Carbone,L Zhong,Y Amhis,A Bondar,M Seco,C Frei,D Brett,V Niess,L Shekhtman,D Hynds,F Kruse,O Schneider,S A Wotton,G Krocker,P Szczypka,A Büchler-Germann,C J Parkinson,G Graziani,M Kaballo,R Mcnulty,O Callot,D Lambert,R Santacesaria,E Santovetti,T Latham,P Seyfert,J Palacios,J J Back,C Bozzi,R Lefèvre,G Bencivenni,D Websdale,M Needham,J Luisier,W Barter,P David,M Alexander,Y Shcheglov,D Popov,A Affolder,P Diniz Batista,R Vazquez Gomez,K Sobczak,C Göbel,Z Ajaltouni,E Thomas,H Brown,F Dordei,S Malde,J Molina Rodriguez,H V Cliff,V V Gligorov,U Egede,J A Hernando Morata,J 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doi:10.1007/jhep04(2012)093

Abstract

Abstract The production of B ± mesons in proton-proton collisions at $ \sqrt {s} $ = 7 TeV is studied using 35 pb−1 of data collected by the LHCb detector. The B ± mesons are reconstructed exclusively in the B ± → J/ψK ± mode, with J/ψ → μ + μ −. The differential production cross-section is measured as a function of the B ± transverse momentum in the fiducial region 0 < p T < 40 GeV/c and with rapidity 2.0 < y < 4.5. The total cross-section, summing up B + and B −, is measured to be σ(pp → B ± X, 0 < p T < 40 GeV/c, 2.0 < y < 4.5) = 41.4 ± 1.5 (stat.) ± 3.1 (syst.) μb.

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