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Measurement of $b$-hadron fractions in 13 TeV $pp$ collisions

The LHCb collaboration
Aaij, Roel , Abellán Beteta, Carlos , Adeva, Bernardo , Adinolfi, Marco , Aidala, Christine Angela , Ajaltouni, Ziad , Akar, Simon , Albicocco, Pietro , Albrecht, Johannes , Alessio, Federico
Phys.Rev.D 100 (2019) 031102, 2019.
https://doi.org/10.17182/hepdata.141536

Abstract
The production fractions of $\overline{B}_s^0$ and $\Lambda_b^0$ hadrons, normalized to the sum of $B^-$ and $\overline{B}^0$ fractions, are measured in 13 TeV pp collisions using data collected by the LHCb experiment, corresponding to an integrated luminosity of 1.67/fb. These ratios, averaged over the $b$-hadron transverse momenta from 4 to 25 GeV and pseudorapidity from 2 to 5, are $0.122 \pm 0.006$ for $\overline{B}_s^0$, and $0.259 \pm 0.018$ for $\Lambda_b^0$, where the uncertainties arise from both statistical and systematic sources. The $\Lambda_b^0$ ratio depends strongly on transverse momentum, while the $\overline{B}_s^0$ ratio shows a mild dependence. Neither ratio shows variations with pseudorapidity. The measurements are made using semileptonic decays to minimize theoretical uncertainties. In addition, the ratio of $D^+$ to $D^0$ mesons produced in the sum of $\overline{B}^0$ and $B^-$ semileptonic decays is determined as $0.359\pm0.006\pm 0.009$, where the uncertainties are statistical and systematic.

  • Table 1

    Table 1 in the Supplemental Material of the paper

    10.17182/hepdata.141536.v1/t1

    Values of $f_s/(f_u+f_d)$ and $f_{\mathit{\Lambda}_b^0}/(f_u+f_d)$ in each $p_\mathrm{T}(H_b)$ bin.

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