Eur. Phys. J. C (2018) 78: 2
https://doi.org/10.1140/epjc/s10052-017-5489-y

Regular Article - Theoretical Physics

Charmonia production from b-hadron decays at LHC with -factorization: , and

¹ Skobeltsyn Institute of Nuclear Physics, Moscow State University, 119991, Moscow, Russia
² Joint Institute for Nuclear Research, 141980, Dubna, Moscow Region, Russia
³ P.N. Lebedev Physics Institute, 119991, Moscow, Russia
⁴ Deutsches Elektronen-Synchrotron, Notkestrasse 85, Hamburg, Germany

^* e-mail: lipatov@theory.sinp.msu.ru

Received: 22 November 2017
Accepted: 19 December 2017
Published online: 29 December 2017

Abstract

We consider the production of and mesons originating from the decays of b-flavored hadrons at the LHC using the -factorization approach. Our analysis covers both inclusive charmonia production and production of 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 , 8 and 13 TeV. The contributions from double parton scattering to the associated non-prompt production are estimated and found to be small.