Speaker
Dr
Paloma Quiroga Arias
(LPTHE , UPMC Univ. Paris 6)
Description
Recent developments in the computation of the NLO improvement for non-linear QCD evolution equations has allowed, for the first time, for the consistent description of experimental data using a first principle approach. In particular, the Balitsky-Kovchegov equation including running coupling effects (rcBK) has been shown to provide an excellent global description of inclusive DIS data.
I will present a global analysis of available data on inclusive structure functions measured in electron-proton scattering at small values of Bjorken-x, including the latest data from the combined HERA analysis on reduced cross sections. The resulting parametrizations allow for the reliable computation of physical observables in a kinematical region (relevant for both p-p and A-A programmes at the LHC) where the standard DGLAP based techniques are expected to fail. Also, the inclusion of the heavy quark contribution has resulted in a good description of the experimental data for the charm component of the proton structure function.
Further, I will discuss the kinematical domain where significant deviations from NLO-DGLAP should be expected and a strategy to interface this approach, reliant on k_t factorization, with the commonly used collinearly factorized parton distribution functions. Also preliminary extensions for nuclei will be discussed.
Primary author
Dr
Paloma Quiroga Arias
(LPTHE , UPMC Univ. Paris 6)
Co-authors
Carlos Salgado
(Departamento de Fisica de Particulas and IGFAE, Universidade de Santiago de Compostela)
Guilherme Milhano
(CENTRA, IST Lisbon and CERN TH)
Javier Albacete
(Institut de Physique Theorique, CEA/Saclay)
Nestor Armesto
(Departamento de Fisica de Particulas and IGFAE, Universidade de Santiago de Compostela)
