Speaker
José Rodríguez Quintero
(Universidad de Huelva)
Description
Parton distribution functions (PDFs) are defining expressions of hadron structure. Exploiting the role of effective charges in quantum chromodynamics, an algebraic scheme is described which, given any hadron's valence parton PDFs at the hadron scale, delivers predictions for all its PDFs (unpolarized and polarized) at any higher scale. The scheme delivers results that are largely independent of both the value of the hadron scale and the pointwise form of the charge; and, inter alia, enables derivation of a model-independent identity that relates the strength of the hadron's gluon helicity PDF, to that of the analogous singlet polarized quark PDF and valence quark momentum fraction.
Author
José Rodríguez Quintero
(Universidad de Huelva)