Regular Article - Theoretical Physics
Diffractive semi-hard production of a or a from single-parton fragmentation plus a jet in hybrid factorization
European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*), 38123, Villazzano, Trento, Italy
2 Fondazione Bruno Kessler (FBK), 38123, Povo, Trento, Italy
3 INFN-TIFPA Trento Institute of Fundamental Physics and Applications, 38123, Povo, Trento, Italy
4 Dipartimento di Fisica, Università della Calabria, 87036, Arcavacata di Rende, Cosenza, Italy
5 Istituto Nazionale di Fisica Nucleare, Gruppo collegato di Cosenza, 87036, Arcavacata di Rende, Cosenza, Italy
6 Université Paris-Saclay, CNRS, IJCLab, 91405, Orsay, France
Accepted: 18 September 2022
Published online: 19 October 2022
We investigate the inclusive hadroproduction of a heavy quarkonium ( or ), in association with a light-flavored jet, as a testing ground for the semi-hard regime of QCD. Our theoretical setup is the hybrid high-energy and collinear factorization, where the standard collinear approach is supplemented by the t-channel resummation of leading and next-to-leading energy logarithms à la BFKL. We present predictions for rapidity and azimuthal-angle differential distributions, hunting for stabilizing effects of the high-energy series under higher-order corrections. Our reaction represents an additional channel to test the production mechanisms of quarkonia at high energies and large transverse momenta and to possibly shed light on the transition region from heavy-quark pair production to single-parton fragmentation of and states.
© The Author(s) 2022
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