TY  - EJOUR
AU  - Hautmann, Francesco
AU  - Keersmaekers, L.
AU  - Lelek, A.
AU  - Barzani, S. Sadeghi
AU  - Taheri Monfared, S.
TI  - Collinear and TMD distributions with dynamical soft-gluon resolution scale
IS  - DESY-25-031
M1  - PUBDB-2025-00904
M1  - DESY-25-031
M1  - arXiv:2502.19380
PY  - 2025
N1  - 33 pages, 15 figures
AB  - 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.
LB  - PUB:(DE-HGF)25
DO  - DOI:10.3204/PUBDB-2025-00904
UR  - https://bib-pubdb1.desy.de/record/624699
ER  -