nucl-th digest · Oct 12, 2015

Modelling the nucleon structure

We review the status of our understanding of nucleon structure based on the modelling of different kinds of parton distributions. We use the concept of generalized transverse momentum dependent parton distributions and Wigner distributions, which combine the features of transverse-momentum dependent parton distributions and generalized parton distributions. We revisit various quark models which account for different aspects of these parton distributions. We then identify applications of these distributions to gain a simple interpretation of key properties of the quark and gluon dynamics in the nucleon.

↳ hep-phhep-exnucl-thEPJA(2016)·53 citations

BEC-BCS crossover in a cold and magnetized two color NJL model

Dyana C. Duarte🇧🇷 · P. G. Allen🇦🇷 · R. L. S. Farias🇧🇷 · Patrícia H. A. Manso🇧🇷 · Rudnei O. Ramos🇧🇷 · N. N. Scoccola🇦🇷

The BEC-BCS crossover for a NJL model with diquark interactions is studied in the presence of an external magnetic field. Particular attention is paid to different regularization schemes used in the literature. A thorough comparison of results is performed for the case of a cold and magnetized two-color NJL model. According to our results, the critical chemical potential for the BEC transition exhibits a clear inverse magnetic catalysis effect for magnetic fields in the range $1 ≲ e B / m_{π}^{2} ≲ 20$ . As for the BEC-BCS crossover, the corresponding critical chemical potential is very weakly sensitive to magnetic fields up to $e B \sim 9 m_{π}^{2}$ , showing a much smaller inverse magnetic catalysis as compared to the BEC transition, and displays a strong magnetic catalysis from this point on.

↳ hep-phcond-mat.supr-conhep-thnucl-thPRD(2016)·44 citations

Monday·October 12, 2015

Modelling the nucleon structure

BEC-BCS crossover in a cold and magnetized two color NJL model

Affiliations