| Article | |
| Report number | arXiv:2408.07383 ; Nikhef-2024-014 ; Edinburgh 2024/5 ; TIF-UNIMI-2024-13 |
| Title | An FONLL prescription with coexisting flavor number PDFs |
| Author(s) | Barontini, Andrea (INFN, Milan ; Milan U.) ; Candido, Alessandro (INFN, Milan ; Milan U. ; CERN) ; Hekhorn, Felix (INFN, Milan ; Milan U. ; Jyvaskyla U. ; Helsinki U.) ; Magni, Giacomo (Vrije U., Amsterdam ; NIKHEF, Amsterdam) ; Stegeman, Roy (U. Edinburgh, Higgs Ctr. Theor. Phys.) |
| Publication | 2024-10-01 |
| Imprint | 2024-08-14 |
| Number of pages | 17 |
| Note | 17 pages, 4 figures. Version as published in JHEP. Various clarifications added. A new appendix (now App. A) added. Code documentation available from https://pineko.readthedocs.io/en/latest/theory/fonll.html |
| In: | JHEP 2410 (2024) 004 |
| DOI | 10.1007/JHEP10(2024)004 (publication) |
| Subject category | hep-ph ; Particle Physics - Phenomenology |
| Abstract | We present a new prescription to account for heavy quark mass effects in the determination of parton distribution functions (PDFs) based on the FONLL scheme. Our prescription makes explicit use of the freedom to choose the number of active flavors at a given scale and, thus, use coexisting PDFs with different active flavor number. This new prescription is perturbatively equivalent to the former but improves the implementation in two ways. First, it can be naturally generalized to account simultaneously for multiple heavy quark effects, such as charm and bottom effects, which can both be relevant at the same scale due to the small mass difference. Second, it can be trivially generalized to use at any fixed-order or collinear resummed accuracy, while previous prescriptions required ad-hoc expansions of the DGLAP evolution kernels for each coefficient. We supplement the paper with codes for the computation of deep inelastic scattering observables in this new prescription. |
| Copyright/License | preprint: (License: arXiv nonexclusive-distrib 1.0) publication: © 2024-2025 The Authors (License: CC-BY-4.0), sponsored by SCOAP³ |
Corresponding record in: Inspire
Δημιουργία εγγραφής 2024-08-16, τελευταία τροποποίηση 2024-12-28
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