Revisiting NLO QCD corrections to total inclusive J/psi and Upsilon photoproduction cross sections in lepton-proton collisions
| Autor: | Serri, Alice Colpani, Feng, Yu, Flore, Carlo, Lansberg, Jean-Philippe, Ozcelik, Melih A., Shao, Hua-Sheng, Yedelkina, Yelyzaveta |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Phys.Lett.B 835 (2022) 137556 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.physletb.2022.137556 |
| Popis: | We revisit inclusive J/psi and Upsilon photoproduction at lepton-hadron colliders, namely in the limit when the exchanged photon is quasi real. Our computation includes the next-to-leading-order (NLO) alpha_s corrections to the leading-order contributions in v. Similarly to the case of NLO charmonium-hadroproduction processes, the resulting cross sections obtained in the MS-bar factorisation scheme are sometimes found to be negative. We show that the scale-fixing criteria which we derived in a previous study of eta(c) production successfully solves this problem from the EicC all the way up to the FCC-eh energies. We then elaborate on how to study a scale uncertainty akin to that derived by scale variations when one fixes a scale. In turn, we investigate where both J/psi and Upsilon photoproduction could be used to improve our knowledge of gluon content of the proton at scales as low as a couple of GeV. Comment: 11 pages, 19 figures, 2 tables. Uses elsarticle.cls. Matches published version |
| Databáze: | arXiv |
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