RT Journal Article
T1 Pion distribution functions from low-order Mellin moments
A1 Lu, Ya
A1 Xu, Yinzhen
A1 Raya, Khépani
A1 Roberts, Craig D.
A1 Rodríguez Quintero, José
AB Exploiting an evolution scheme for parton distribution functions (DFs) that is all-orders exact, contemporary lattice-QCD (lQCD) results for low-order Mellin moments of the pion valence quark DF are shown to be mutually consistent. The analysis introduces a means by which key odd moments can be obtained from the even moments in circumstances where only the latter are available. Combining these elements, one arrives at parameter-free lQCD-based predictions for the pointwise behaviour of pion valence, glue, and sea DFs, with sound uncertainty estimates. The behaviour of the pion DFs at large light-front momentum fraction, x>0.85, is found to be consistent with QCD expectations and continuum analyses of pion structure functions, i.e., damping like (1−x)βparton, with βvalence≈2.4, βglue≈3.6, βsea≈4.6. It may be possible to test these predictions using data from forthcoming experiments.
PB Elsevier
SN 0370-2693
SN 1873-2445 (electrónico)
YR 2024
FD 2024-02
LK https://hdl.handle.net/10272/23641
UL https://hdl.handle.net/10272/23641
LA eng
NO Lu, Y., Xu, Y.-Z., Raya, K., Roberts, C. D., & Rodríguez-Quintero, J. (2024). Pion distribution functions from low-order Mellin moments. In Physics Letters B (Vol. 850, p. 138534). Elsevier BV. https://doi.org/10.1016/j.physletb.2024.138534
NO We are grateful to Z.-F. Cui and J.-H. Zhang for valuable discussions.Work supported by: National Natural Science Foundation ofChina (grant nos. 12135007, 12205149); Spanish Ministry of Scienceand Innovation (MICINN) (grant no. PID2022-140440NB-C22); Juntade Andalucía (grant no. P18-FR-5057); and STRONG-2020 “The stronginteraction at the frontier of knowledge: fundamental research andapplications” which received funding from the European Union’s Horizon2020 research and innovation programme (grant agreement no.824093).
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026