High-energy resummation effects in Heavy Quarkonium production physics

by Maxim Nefedov

BGU

at Particles and Fields Seminar

Mon, 02 Dec 2024, 14:00
Sacta-Rashi Building for Physics (54), room 207

Abstract

In the talk, an overview of inclusive heavy quarkonium production theory -- the Non-Relativistic QCD (NRQCD) factorisation, and corresponding phenomenology in proton-proton and electron-proton collisions will be given (see also the recent review [1] and the paper [2]). Then the resolution of perturbative instability of some observables in inclusive hadroproduction of eta-c mesons [3], inclusive photoproduction of J/psi [4] and exclusive photoproduction of J/psi [5] at NLO with the help of the resummation of high-energy logarithms in the hard process will be discussed. The continuation of this program beyond the Doubly-Logarithmic Approximation of Refs. [3,4,5] will be also mentioned if time permits (see [6,7]).

[1] D. Boer, C. A. Flett, C. Flore, D. Kikola, J. P. Lansberg, M. Nefedov, C. Van Hulse, S. Bhattacharya, J. Bor and M. Butenschoen, et al., ``Physics case for quarkonium studies at the Electron Ion Collider,'' arXiv:2409.03691 [hep-ph].
[2] N. Brambilla, M. Butenschoen and X. P. Wang, ``How well does nonrelativistic QCD factorization work at next-to-leading order?,'' arXiv:2411.16384 [hep-ph].
[3] J. P. Lansberg, M. Nefedov and M. A. Ozcelik, ``Matching next-to-leading-order and high-energy-resummed calculations of heavy-quarkonium-hadroproduction cross sections,'' JHEP 05, 083 (2022) [arXiv:2112.06789 [hep-ph]].
[4] J. P. Lansberg, M. Nefedov and M. A. Ozcelik, ``Curing the high-energy perturbative instability of vector-quarkonium-photoproduction cross sections at order $\alpha \alpha _s^3$ with high-energy factorisation,'' Eur. Phys. J. C 84, no.4, 351 (2024) [arXiv:2306.02425 [hep-ph]].
[5] C. A. Flett, J. P. Lansberg, S. Nabeebaccus, M. Nefedov, P. Sznajder and J. Wagner, ``Exclusive vector-quarkonium photoproduction at NLO in \alpha_s in collinear factorisation with evolution of the generalised parton distributions and high-energy resummation,'' Phys. Lett. B 859, 139117 (2024) [arXiv:2409.05738 [hep-ph]].
[6] M. Nefedov, ``One-loop impact factors for heavy quarkonium production: S-wave case,'' arXiv:2408.06234 [hep-ph].
[7] M. Nefedov, ``Forward eta_Q production impact factor at NLO,'' arXiv:2408.09440 [hep-ph].

Created on 29-10-2024 by Kats, Yevgeny (katsye)
Updaded on 28-11-2024 by Kats, Yevgeny (katsye)