Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/131774
Title: Measurement of b hadron production fractions in 7 TeV pp collisions
Author: Abellan Beteta, Carlos
Calvo Gómez, Míriam
Camboni, Alessandro
Comerma Montells, Albert
Domingo Bonal, Francesc
Garrido Beltrán, Lluís
Gascón Fora, David
Grabalosa Gándara, Marc
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
López Asamar, Elias
Musy, Marco
Pérez-Calero Yzquierdo, Antonio
Picatoste Olloqui, Eduardo
Pie Valls, B. (Blai)
Potterat, Cédric
Puig Navarro, Albert
Roselló, M.
Ruiz, Hugo (Ruiz Pérez)
Vázquez Gómez, Ricard
Vilasis-Cardona, Xavier
LHCb Collaboration
Keywords: Física de partícules
Experiments
Col·lisions (Física)
Hadrons
Particle physics
Experiments
Collisions (Physics)
Hadrons
Issue Date: 1-Feb-2012
Publisher: American Physical Society
Abstract: Measurements of b hadron production ratios in proton-proton collisions at a center-of-mass energy of 7 TeV with an integrated luminosity of 3     pb − 1 are presented. We study the ratios of strange B meson to light B meson production f s / ( f u + f d ) and Λ 0 b baryon to light B meson production f Λ b / ( f u + f d ) as a function of the charmed hadron-muon pair transverse momentum p T and the b hadron pseudorapidity η , for p T between 0 and 14 GeV and η between 2 and 5. We find that f s / ( f u + f d ) is consistent with being independent of p T and η , and we determine f s / ( f u + f d ) = 0.134 ± 0.004 + 0.011 − 0.010 , where the first error is statistical and the second systematic. The corresponding ratio f Λ b / ( f u + f d ) is found to be dependent upon the transverse momentum of the charmed hadron-muon pair, f Λ b / ( f u + f d ) = ( 0.404 ± 0.017 ( stat ) ± 0.027 ( syst ) ± 0.105 ( Br ) ) × [ 1 − ( 0.031 ± 0.004 ( stat ) ± 0.003 ( syst ) ) × p T ( GeV ) ] , where Br reflects an absolute scale uncertainty due to the poorly known branching fraction B ( Λ + c → p K − π + ) . We extract the ratio of strange B meson to light neutral B meson production f s / f d by averaging the result reported here with two previous measurements derived from the relative abundances of ¯¯¯ B 0 s → D + s π − to ¯¯¯ B 0 → D + K − and ¯¯¯ B 0 → D + π − . We obtain f s / f d = 0.267 + 0.021 − 0.020 .
Note: Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.85.032008
It is part of: Physical Review D, 2012, vol. 85, num. 3, p. 032008
URI: http://hdl.handle.net/2445/131774
Related resource: https://doi.org/10.1103/PhysRevD.85.032008
ISSN: 1550-7998
Appears in Collections:Articles publicats en revistes (Electrònica)
Articles publicats en revistes (Física de la Matèria Condensada)
Articles publicats en revistes (Física Quàntica i Astrofísica)

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