Speaker
Description
In the talk, the effects of high-energy resummation in QCD, arising in cross sections of production of heavy quarkonia at hadron and lepton-hadron colliders will be discussed. The resolution of perturbative instability of some observables in inclusive hadroproduction of eta-c mesons [1], inclusive photoproduction of J/psi [2] and exclusive photoproduction of J/psi [3] at NLO with the help of the resummation of high-energy logarithms in the hard process will be discussed. The new results, continuing this program beyond the Doubly-Logarithmic Approximation of Refs. [1,2,3] will be presented [4,5].
[1] 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]].
[2] 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]].
[3] 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]].
[4] M. Nefedov,One-loop impact factors for heavy quarkonium production: S-wave case,'' arXiv:2408.06234 [hep-ph].
[5] M. Nefedov, ``Forward eta_Q production impact factor at NLO,'' arXiv:2408.09440 [hep-ph].
| Track | 6: Heavy Quarks (including top and flavour physics) |
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