Forward particle production in proton-nucleus collisions at next-to-leading order
| Autor: | D. N. Triantafyllopoulos |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Quark Particle physics Proton 010308 nuclear & particles physics QC1-999 FOS: Physical sciences 01 natural sciences Eikonal approximation Gluon Color-glass condensate High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Factorization 0103 physical sciences Rapidity Perturbation theory (quantum mechanics) 010306 general physics Nuclear Experiment |
| Zdroj: | EPJ Web of Conferences, Vol 192, p 00014 (2018) |
| DOI: | 10.48550/arxiv.1810.02179 |
| Popis: | We consider the next-to-leading order (NLO) calculation of single inclusive particle production at forward rapidities in proton-nucleus collisions and in the framework of the Color Glass Condensate (CGC). We focus on the quark channel and the corrections associated with the impact factor. In the first step of the evolution the kinematics of the emitted gluon is kept exactly (and not in the eikonal approximation), but such a treatment which includes NLO corrections is not explicitly separated from the high energy evolution. Thus, in this newly established "factorization scheme", there is no "rapidity subtraction". The latter suffers from fine tuning issues and eventually leads to an unphysical (negative) cross section. On the contrary, our reorganization of the perturbation theory leads by definition to a well-defined cross section and the numerical evaluation of the NLO correction is shown to have the correct size. Comment: 7 pages, 5 figures, based on talk given at QCD@Work, 25-28 June 2018, Matera, Italy |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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