Charmonia production from b-hadron decays at LHC with $$k_T$$ kT -factorization: $$J/\psi $$ J/ψ , $$\psi (2S)$$ ψ(2S) and $$J/\psi + Z$$ J/ψ+Z
Abstract We consider the production of $$J/\psi $$ J/ψ and $$\psi (2S)$$ ψ(2S) mesons originating from the decays of b-flavored hadrons at the LHC using the $$k_T$$ kT -factorization approach. Our analysis covers both inclusive charmonia production and production of $$J/\psi $$ J/ψ mesons in associa...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2017-12-01
|
| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-017-5489-y |
| Summary: | Abstract We consider the production of $$J/\psi $$ J/ψ and $$\psi (2S)$$ ψ(2S) mesons originating from the decays of b-flavored hadrons at the LHC using the $$k_T$$ kT -factorization approach. Our analysis covers both inclusive charmonia production and production of $$J/\psi $$ 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 $$\sqrt{s} = 7$$ s=7 , 8 and 13 TeV. The contributions from double parton scattering to the associated non-prompt $$J/\psi + Z$$ J/ψ+Z production are estimated and found to be small. |
|---|---|
| ISSN: | 1434-6044 1434-6052 |