Collinear and TMD distributions with dynamical soft-gluon resolution scale
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915381095956480 |
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| author | Hautmann, F. Keersmaekers, L. Lelek, A. Barzani, S. Sadeghi Monfared, S. Taheri |
| author_facet | Hautmann, F. Keersmaekers, L. Lelek, A. Barzani, S. Sadeghi Monfared, S. Taheri |
| contents | Soft-gluon resolution scales characterize parton branching Monte Carlo implementations of the evolution equations for parton distribution functions in Quantum Chromodynamics (QCD). We examine scenarios with dynamical, i.e., branching-scale dependent, resolution scale, and discuss physical implications for both collinear and transverse-momentum dependent (TMD) distributions. We perform the first determination of parton distributions with dynamical resolution scale, at next-to-leading order (NLO) in perturbation theory, from fits to precision deep-inelastic scattering measurements from HERA. We present an application of TMD distributions with dynamical resolution scale to Drell-Yan lepton-pair transverse momentum spectra at the LHC, and comment on the extraction of non-perturbative intrinsic-kT parameters from Drell-Yan data at small transverse momenta. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2502_19380 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Collinear and TMD distributions with dynamical soft-gluon resolution scale Hautmann, F. Keersmaekers, L. Lelek, A. Barzani, S. Sadeghi Monfared, S. Taheri High Energy Physics - Phenomenology Soft-gluon resolution scales characterize parton branching Monte Carlo implementations of the evolution equations for parton distribution functions in Quantum Chromodynamics (QCD). We examine scenarios with dynamical, i.e., branching-scale dependent, resolution scale, and discuss physical implications for both collinear and transverse-momentum dependent (TMD) distributions. We perform the first determination of parton distributions with dynamical resolution scale, at next-to-leading order (NLO) in perturbation theory, from fits to precision deep-inelastic scattering measurements from HERA. We present an application of TMD distributions with dynamical resolution scale to Drell-Yan lepton-pair transverse momentum spectra at the LHC, and comment on the extraction of non-perturbative intrinsic-kT parameters from Drell-Yan data at small transverse momenta. |
| title | Collinear and TMD distributions with dynamical soft-gluon resolution scale |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2502.19380 |