Measurement of the Dependence of the Hadron Production Fraction Ratios ⨍s/⨍u and ⨍d/⨍u on B Meson Kinematic Variables in Proton-Proton Collisions at √s = 13 TeV
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2023-09-22
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Journal Article
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Abstract
The dependence of the ratio between the B⁰ₛ and B⁺ hadron production fractions, ⨍s/⨍u, on the transverse momentum (p_T) and rapidity of the B mesons is studied using the decay channels B⁰ₛ → J/ψϕ and B⁺ → J/ψK⁺. The analysis uses a data sample of proton-proton collisions at a center-of-mass energy of 13 TeV, collected by the CMS experiment in 2018 and corresponding to an integrated luminosity of 61.6fb⁻¹. The ⨍s/⨍u ratio is observed to depend on the Bp_T and to be consistent with becoming asymptotically constant at large p_T. No rapidity dependence is observed. The ratio of the B⁰ to B⁺ meson production fractions, ⨍d/⨍u, is also measured, for the first time in proton-proton collisions, using the B⁰ → J/ψK*⁰ decay channel. The result is found to be within 1 standard deviation of unity and independent of p_T and rapidity, as expected from isospin invariance.
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published
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131 (12)
Pages / Article No.
121901
Publisher
American Physical Society
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Subject
Bottom mesons; Hadron colliders
Organisational unit
03904 - Wallny, Rainer / Wallny, Rainer
03593 - Dissertori, Günther / Dissertori, Günther
09720 - de Cosa, Annapaola / de Cosa, Annapaola