NLO corrections and factorization for transverse single-spin asymmetries
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866918251158568960 |
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| author | Rein, Daniel Schlegel, Marc Tollkühn, Patrick Vogelsang, Werner |
| author_facet | Rein, Daniel Schlegel, Marc Tollkühn, Patrick Vogelsang, Werner |
| contents | We present next-to-leading order QCD corrections for the cross sections for $\ell p^\uparrow\to hX$, $\ell p^\uparrow\to {\mathrm{jet}}X$ with transversely polarized initial protons. These cross sections are known to be power-suppressed in QCD and probe twist-3 parton correlation functions in the proton. Our calculation exhibits the full complexity of a perturbative QCD analysis beyond leading power, involving in particular various derivatives of the parton correlation functions. We demonstrate that collinear factorization for these single-spin observables holds at one loop. We also present exploratory phenomenological results for the NLO single-spin asymmetry in $ep^\uparrow\to hX$ and compare to data from the HERMES experiment. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_16097 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | NLO corrections and factorization for transverse single-spin asymmetries Rein, Daniel Schlegel, Marc Tollkühn, Patrick Vogelsang, Werner High Energy Physics - Phenomenology High Energy Physics - Experiment We present next-to-leading order QCD corrections for the cross sections for $\ell p^\uparrow\to hX$, $\ell p^\uparrow\to {\mathrm{jet}}X$ with transversely polarized initial protons. These cross sections are known to be power-suppressed in QCD and probe twist-3 parton correlation functions in the proton. Our calculation exhibits the full complexity of a perturbative QCD analysis beyond leading power, involving in particular various derivatives of the parton correlation functions. We demonstrate that collinear factorization for these single-spin observables holds at one loop. We also present exploratory phenomenological results for the NLO single-spin asymmetry in $ep^\uparrow\to hX$ and compare to data from the HERMES experiment. |
| title | NLO corrections and factorization for transverse single-spin asymmetries |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2503.16097 |