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2013-04

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cc by (c) LHCb Collaboration, 2013
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/58757

Measurement of the fragmentation fraction ratio f s /f d and its dependence on B meson kinematics

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http://dx.doi.org/10.1007/JHEP04(2013)001

Abstract

The relative production rate of B0s and B 0 mesons is determined with the hadronic decays B0s→D−sπ+ and B 0 → D − K +. The measurement uses data corresponding to 1.0 fb−1 of pp collisions at a centre-of-mass energy of s√=7 TeV recorded in the forward region with the LHCb experiment. The ratio of production rates, f s /f d , is measured to be 0.238 ± 0.004 ± 0.015 ± 0.021, where the first uncertainty is statistical, the second systematic, and the third theoretical. This is combined with a previous LHCb measurement to obtain f s /f d  = 0.256 ± 0.020. The dependence of f s /f d on the transverse momentum and pseudorapidity of the B meson is determined using the decays B0s→D−sπ+ and B 0 → D −π+. There is evidence for a decrease with increasing transverse momentum, whereas the ratio remains constant as a function of pseudorapidity. In addition, the ratio of branching fractions of the decays B 0 → D − K + and B 0 → D −π+ is measured to be 0.0822 ± 0.0011 (stat) ± 0.0025 (syst).

Subject

Hadrons, Gran Col·lisionador d'Hadrons, Teoria quàntica de camps, Gravitació, Relativitat (Física)

Subject (English)

Hadrons, Large Hadron Collider (France and Switzerland), Quantum field theory, Gravitation, Relativity (Physics)

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Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

Citation

ABELLAN BETETA, Carlos, et al. Measurement of the fragmentation fraction ratio f s /f d and its dependence on B meson kinematics. European Physical Journal C. 2013. Vol. 2013, num. 4, pags. 1. ISSN 1434-6044. [consulted: 14 of August of 2026]. Available at: https://hdl.handle.net/2445/58757

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