Charmonia production from $b$-hadron decays at LHC with $k_T$-factorization: $J/ψ$, $ψ(2S)$ and $J/ψ+ Z$

A. V. Lipatov; S. P. Baranov; H. Jung; M. A. Malyshev

doi:10.1140/epjc/s10052-017-5489-y

paper

Charmonia production from $b$ -hadron decays at LHC with $k_{T}$ -factorization: $J / ψ$ , $ψ (2 S)$ and $J / ψ + Z$

arXiv:1711.05625 · doi:10.1140/epjc/s10052-017-5489-y

Abstract

We consider the production of $J / ψ$ and $ψ (2 S)$ mesons originating from the decays of $b$ -flavored hadrons at the LHC using the $k_{T}$ -factorization approach. Our analysis covers both inclusive charmonia production and production of $J / ψ$ mesons in association with $Z$ bosons. We apply the transverse momentum dependent (or unintegrated) gluon density in a proton derived from Catani-Ciafaloni-Fiorani-Marchesini (CCFM) evolution equation and adopt fragmentation functions based on the non-relativistic QCD factorization to describe the inclusive $b$ -hadron decays into the different charmonium states. Our predictions agree well with latest experimental data taken by the CMS, ATLAS and LHCb Collaborations at $s = 7$ , $8$ and $13$ ~TeV. The contributions from double parton scattering to the associated non-prompt $J / ψ + Z$ production are estimated and found to be small.

12 pages, 5 figures

Charmonia production from $b$ -hadron decays at LHC with $k_{T}$ -factorization: $J / ψ$ , $ψ (2 S)$ and $J / ψ + Z$

Abstract

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Charmonia production from b-hadron decays at LHC with kT​-factorization: J/ψ, ψ(2S) and J/ψ+Z

Abstract

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Cited by in corpus (3)

Charmonia production from $b$ -hadron decays at LHC with $k_{T}$ -factorization: $J / ψ$ , $ψ (2 S)$ and $J / ψ + Z$