Pseudoscalar heavy-quarkonium hadroproduction from nonrelativistic fragmentation at NLL/NLO$^+$
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arXiv
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| Format: | Preprint |
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2025
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| author | Celiberto, Francesco Giovanni Lonigro, Francesca |
| author_facet | Celiberto, Francesco Giovanni Lonigro, Francesca |
| contents | We investigate the inclusive hadroproduction of pseudoscalar heavy quarkonia, $η_c$ and $η_b$ mesons, in high-energy proton collisions. Our framework bases on the single-parton collinear fragmentation within a variable-flavor number scheme, tailored to describe the moderate to large transverse momentum regime. To this end, we construct a new set of collinear fragmentation functions, denoted as NRFF1.0, which evolve via standard DGLAP equations with a consistent treatment of flavor thresholds. Initial conditions for all parton-induced channels are computed using next-to-leading-order nonrelativistic QCD. We perform our analysis within the NLL/NLO$^+$ hybrid factorization framework, employing the JETHAD numerical interface together with the symJETHAD symbolic engine. These tools allow us to deliver predictions for high-energy observables sensitive to quarkonium final states at 13 TeV LHC. To the best of our knowledge, the NRFF1.0 sets represent the first-ever release of collinear fragmentation functions for heavy quarkonia that consistently includes all partonic channels within collinear factorization. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_10593 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Pseudoscalar heavy-quarkonium hadroproduction from nonrelativistic fragmentation at NLL/NLO$^+$ Celiberto, Francesco Giovanni Lonigro, Francesca High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Theory Nuclear Experiment Nuclear Theory We investigate the inclusive hadroproduction of pseudoscalar heavy quarkonia, $η_c$ and $η_b$ mesons, in high-energy proton collisions. Our framework bases on the single-parton collinear fragmentation within a variable-flavor number scheme, tailored to describe the moderate to large transverse momentum regime. To this end, we construct a new set of collinear fragmentation functions, denoted as NRFF1.0, which evolve via standard DGLAP equations with a consistent treatment of flavor thresholds. Initial conditions for all parton-induced channels are computed using next-to-leading-order nonrelativistic QCD. We perform our analysis within the NLL/NLO$^+$ hybrid factorization framework, employing the JETHAD numerical interface together with the symJETHAD symbolic engine. These tools allow us to deliver predictions for high-energy observables sensitive to quarkonium final states at 13 TeV LHC. To the best of our knowledge, the NRFF1.0 sets represent the first-ever release of collinear fragmentation functions for heavy quarkonia that consistently includes all partonic channels within collinear factorization. |
| title | Pseudoscalar heavy-quarkonium hadroproduction from nonrelativistic fragmentation at NLL/NLO$^+$ |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Theory Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2510.10593 |