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| Main Authors: | , , |
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| Format: | Preprint |
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2024
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| Online Access: | https://arxiv.org/abs/2411.16384 |
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| _version_ | 1866916848812949504 |
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| author | Brambilla, Nora Butenschoen, Mathias Wang, Xiang-Peng |
| author_facet | Brambilla, Nora Butenschoen, Mathias Wang, Xiang-Peng |
| contents | We perform a thorough investigation of the universality of the long distance matrix elements (LDMEs) of nonrelativistic QCD factorization based on a next-to-leading order (NLO) fit of $J/ψ$ color octet (CO) LDMEs to high transverse momentum $p_T$ $J/ψ$ and $η_c$ production data at the LHC. We thereby apply a novel fit-and-predict procedure to systematically take into account scale variations, and predict various observables never studied in this context before. In particular, the LDMEs can well describe $J/ψ$ hadroproduction up to the highest measured values of $p_T$, as well as $Υ(nS)$ production via potential NRQCD based relations. Furthermore, $J/ψ$ production in $γγ$ and $γp$ collisions is surprisingly reproduced down to $p_T=1$ GeV, as long as the region of large inelasticity $z$ is excluded, which may be of significance in future quarkonium studies, in particular at the EIC and the high-luminosity LHC. In addition, our summary reveals an interesting pattern as to which observables still evade a consistent description. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_16384 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | How well does nonrelativistic QCD factorization work at next-to-leading order? Brambilla, Nora Butenschoen, Mathias Wang, Xiang-Peng High Energy Physics - Phenomenology We perform a thorough investigation of the universality of the long distance matrix elements (LDMEs) of nonrelativistic QCD factorization based on a next-to-leading order (NLO) fit of $J/ψ$ color octet (CO) LDMEs to high transverse momentum $p_T$ $J/ψ$ and $η_c$ production data at the LHC. We thereby apply a novel fit-and-predict procedure to systematically take into account scale variations, and predict various observables never studied in this context before. In particular, the LDMEs can well describe $J/ψ$ hadroproduction up to the highest measured values of $p_T$, as well as $Υ(nS)$ production via potential NRQCD based relations. Furthermore, $J/ψ$ production in $γγ$ and $γp$ collisions is surprisingly reproduced down to $p_T=1$ GeV, as long as the region of large inelasticity $z$ is excluded, which may be of significance in future quarkonium studies, in particular at the EIC and the high-luminosity LHC. In addition, our summary reveals an interesting pattern as to which observables still evade a consistent description. |
| title | How well does nonrelativistic QCD factorization work at next-to-leading order? |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2411.16384 |