12–16 Apr 2021
Stony Brook, NY
US/Eastern timezone

Prompt hadroproduction of C-even quarkonia in the light-front kT-factorization approach

13 Apr 2021, 12:54
18m
Virtual (Stony Brook, NY)

Virtual

Stony Brook, NY

Online
Contributed Talk QCD with Heavy Flavors and Hadronic Final States QCD with Heavy Flavors and Hadronic Final States

Speaker

Dr Wolfgang Schaefer (Institute of Nuclear Physics, Polish Academy of Sciences)

Description

In this talk, we present a thorough analysis of ηc(1S,2S) and χc0,χb0 quarkonia hadroproduction in kT-factorisation in the framework of the light-front potential approach for the quarkonium wave function.
The off-shell matrix elements for the ggηc,χc0
vertices are derived in terms of the quarkonium light-front wave function.
We discuss the role of the Melosh spin-rotation and relativistic corrections estimated by comparing our results with those in the standard nonrelativistic QCD (NRQCD) approach. We elaborate on the importance of taking into account the gluon virtualities, which distinguishes our approach from the ones based on TMD distributions.
We compare our results for ηc(1S) to measurements by the LHCb collaboration. The LHCb kinematics probes one of the gluons at small-x, and we
consider the possible impact of gluon saturation effects.

Based on:
I.Babiarz, R.Pasechnik, W.Schafer and A.Szczurek,
``Prompt hadroproduction of ηc(1S,2S) in the kT-factorization approach,''
JHEP 02, 037 (2020)
doi:10.1007/JHEP02(2020)037
[arXiv:1911.03403 [hep-ph]].

I.Babiarz, R.Pasechnik, W.Schafer and A.Szczurek,
``Hadroproduction of scalar P-wave quarkonia in the light-front kT -factorization approach,''
JHEP 06, 101 (2020)
doi:10.1007/JHEP06(2020)101
[arXiv:2002.09352 [hep-ph]].

Primary authors

Dr Wolfgang Schaefer (Institute of Nuclear Physics, Polish Academy of Sciences) Izabela Babiarz (Institute of Nuclear Physics Polish Academy of Sciences) Roman Pasechnik (Lund university) Prof. Antoni Szczurek (Institute of Nuclear Physics PAN)

Presentation materials