Hadroproduction of scalar P-wave quarkonia in the light-front k(T)-factorization approach

0525558 - ÚJF 2021 RIV US eng J - Journal Article
Babiarz, I. - Pasechnik, Roman - Schäfer, W. - Szczurek, A.
Hadroproduction of scalar P-wave quarkonia in the light-front k(T)-factorization approach.
Journal of High Energy Physics. Roč. 2020, č. 6 (2020), č. článku 101. ISSN 1029-8479. E-ISSN 1029-8479
R&D Projects: GA MŠMT(CZ) LTT17018
Institutional support: RVO:61389005
Keywords : QCD phenomenology
OECD category: Particles and field physics
Impact factor: 5.810, year: 2020
Method of publishing: Open access
https://doi.org/10.1007/JHEP06(2020)101

In this work, we present a thorough analysis of scalar P-wave chi(Q0), Q=c,b quarkonia electromagnetic form factors for the gamma*gamma*-> chi(Q0) couplings, as well as their hadroproduction observables in k(perpendicular to)-factorisation using the light-front (LF) potential approach for the quarkonium wave function. The electromagnetic form factors are presented as functions of photon virtualities. 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. Theoretical uncertainties of our approach are found by performing the analysis with two different unintegrated gluon densities and with five distinct models of the Q (Q) over bar interaction potentials consistent with the meson spectra. The results for the rapidity and transverse momentum distributions of chi(Q0) produced in high-energy pp collisions at root s = 13 TeV are shown.
Permanent Link: http://hdl.handle.net/11104/0309660