Energy-scaling behavior of intrinsic transverse-momentum parameters in Drell-Yan simulation

Benecke, Anna;Bethani, Agni;Bruno, Giacomo;Caputo, Claudio;CMS;et.al.
(2025) Physical review D — Vol. 111 (2025)

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Abstract
An analysis is presented based on models of the intrinsic transverse momentum (intrinsic <math display="inline"><msub><mi>k</mi><mi mathvariant="normal">T</mi></msub></math>) of partons in nucleons by studying the dilepton transverse momentum in Drell-Yan events. Using parameter tuning in event generators and existing data from fixed-target experiments and from hadron colliders, our investigation spans 3 orders of magnitude in center-of-mass energy and 2 orders of magnitude in dilepton invariant mass. The results show an energy-scaling behavior of the intrinsic <math display="inline"><msub><mi>k</mi><mi mathvariant="normal">T</mi></msub></math> parameters, independent of the dilepton invariant mass at a given center-of-mass energy.
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Benecke, A., Bethani, A., Bruno, G., Caputo, C., de Favereau de Jeneret, J., Delaere, C., Donertas, I. S., Giammanco, A., Guzel, A. O., Jain, S., Jain, S., Lemaitre, V., Lidrych, J., Mastrapasqua, P., Tran, T. T., Wertz, S., CMS, & et al. (2025). Energy-scaling behavior of intrinsic transverse-momentum parameters in Drell-Yan simulation. Physical review D, 111. https://doi.org/10.1103/PhysRevD.111.072003 (Original work published 2025)