Spatial distribution of angular momentum inside the nucleon

Physics Letters B

Cédric Lorcé¹  Barbara Pasquini²  Luca Mantovani² 

[1] Centre de Physique Théorique, École polytechnique, CNRS, Université Paris-Saclay, F-91128 Palaiseau, France;Dipartimento di Fisica, Università degli Studi di Pavia, I-27100 Pavia, Italy;

关键词: Energy–momentum tensor;    Angular momentum;    Spin structure of the nucleon;   

DOI  :  10.1016/j.physletb.2017.11.018

来源: DOAJ

【 摘 要 】

We discuss in detail the spatial distribution of angular momentum inside the nucleon. We show that the discrepancies between different definitions originate from terms that integrate to zero. Even though these terms can safely be dropped at the integrated level, they have to be taken into account when discussing distributions. Using the scalar diquark model, we illustrate our results and, for the first time, check explicitly that the equivalence between kinetic and canonical orbital angular momentum persists at the level of distributions, as expected in a system without gauge degrees of freedom.

【 授权许可】

Unknown