Speaker
Dr
Mariaelena Boglione
(University of Turin (Italy))
Description
I will address the study of semi-inclusive deep inelastic scattering
cross sections as functions of the transverse momentum, $q_T$. Soft gluon
resummation is performed using the original Collins-Soper-Sterman (CSS)
formalism or, equivalently, the improved Transverse Momentum Dependent
(TMD) framework.
The focus of this talk is the matching between the region where fixed
order perturbative QCD can successfully be applied and the region where
soft gluon resummation is necessary. Interestingly, the commonly used
prescription of matching through the so-called Y-factor cannot be applied,
at least in the SIDIS kinematical configurations considered. In
particular, the non-perturbative component of the resummed cross section
turns out to play a crucial role and should not be overlooked even at
relatively high energies. Moreover, I will show the theoretical
uncertainties of the transverse momentum resummed cross sections in the
CSS formalism related to the scale parameters C_1, C_2 and C_3, and their
interplay with the uncertainties of the non perturbative parameters g_1, g_2 and g_3.
Primary authors
Dr
Alexei Prokudin
(Berks)
Dr
Jose Osvaldo Gonzalez Hernandez
(Jefferson Lab)
Dr
Mariaelena Boglione
(University of Turin (Italy))
Dr
Stefano Melis
(University of Turin)
