Improving the description of dimuon production in neutrino-nucleus collisions using the SACOT-$χ$ scheme
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| Format: | Preprint |
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2025
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| _version_ | 1866911323623784448 |
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| author | Paukkunen, Hannu Helenius, Ilkka Yrjänheikki, Sami |
| author_facet | Paukkunen, Hannu Helenius, Ilkka Yrjänheikki, Sami |
| contents | Dimuon production in deeply inelastic scattering between neutrinos and nuclei plays an important role in constraining the strange-quark parton distribution functions (PDFs). Here, we present a self-contained calculation of this process consisting of a next-to-leading order semi-inclusive charmed-hadron production in the SACOT-$χ$ general-mass variable-flavor-number scheme, followed by a semi-leptonic decay of the charmed hadron. We find that invoking the SACOT-$χ$ scheme introduces modifications up to $20 \, \%$ in comparison to our previous esimates, where only kinematic mass effects were considered through the slow-rescaling variable. We reiterate our earlier observation that the effective acceptance correction - typically used in global PDF fits as a simplifying approximation - depends on the perturbative order, PDFs, scales, and also on the treatment of heavy-quark effects. We find good agreement with the corresponding data from the NuTeV experiment. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2506_09492 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Improving the description of dimuon production in neutrino-nucleus collisions using the SACOT-$χ$ scheme Paukkunen, Hannu Helenius, Ilkka Yrjänheikki, Sami High Energy Physics - Phenomenology Dimuon production in deeply inelastic scattering between neutrinos and nuclei plays an important role in constraining the strange-quark parton distribution functions (PDFs). Here, we present a self-contained calculation of this process consisting of a next-to-leading order semi-inclusive charmed-hadron production in the SACOT-$χ$ general-mass variable-flavor-number scheme, followed by a semi-leptonic decay of the charmed hadron. We find that invoking the SACOT-$χ$ scheme introduces modifications up to $20 \, \%$ in comparison to our previous esimates, where only kinematic mass effects were considered through the slow-rescaling variable. We reiterate our earlier observation that the effective acceptance correction - typically used in global PDF fits as a simplifying approximation - depends on the perturbative order, PDFs, scales, and also on the treatment of heavy-quark effects. We find good agreement with the corresponding data from the NuTeV experiment. |
| title | Improving the description of dimuon production in neutrino-nucleus collisions using the SACOT-$χ$ scheme |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2506.09492 |