RT Journal Article
T1 Kaon distribution functions from empirical information
A1 Xu, Zhen-Ni
A1 Binosi, Daniele
A1 Chen, Chen
A1 Raya, Khépani
A1 Roberts, Craig D.
A1 Rodríguez Quintero, José
AB Using available information from Drell-Yan data on pion and kaon structure functions, an approach is described which enables the development of pointwise profiles for all pion and kaon parton distribution functions (DFs) without reference to theories of hadron structure. The key steps are construction of structure-function-constrained probability-weighted ensembles of valence DF replicas and use of an evolution  scheme for parton DFs that is allorders exact. The DFs obtained express qualitatively sound features of light-meson structure, e.g., the effects of Higgs boson couplings into QCD and the size of heavy-quark momentum fractions in light hadrons. In order to improve the results, additional and more precise data on the 𝑢-quark-in-kaon, u𝐾, to 𝑢-quark-in-pion, u𝜋, DF ratio would be necessary. Of greater value would be extraction of u𝐾 alone, thereby avoiding inference from the ratio: currently, the data-based form of u𝐾 is materially influenced by results for u𝜋.
PB Elsevier
SN 0370-2693
SN 1873-2445 (electrónico)
YR 2025
FD 2025
LK https://hdl.handle.net/10272/28005
UL https://hdl.handle.net/10272/28005
LA eng
NO Xu, Z.-N., Binosi, D., Chen, C., Raya, K., Roberts, C. D., & Rodríguez-Quintero, J. (2025). Kaon distribution functions from empirical information. Physics Letters B, 865, 139451. https://doi.org/10.1016/j.physletb.2025.139451
NO Work supported by: National Natural Science Foundation of China (grant no. 12135007, 12247103); Spanish Ministry of Science, Innovation and Universities (MICIU grant no. PID2022-140440NB-C22); Program d’Alembert of the Université de Paris-Saclay; Project AST22_00001_X, funded by NextGenerationEU and "Plan de Recuperación, Transformación y Resiliencia y Resiliencia'' (PRTR) from MICIU and Junta de Andalucía; and completed in part at Institut Pascal, Université Paris-Saclay, with the support of the program "Investissements d’avenir'' ANR-11-IDEX-0003-01.
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026