The light-front energy-momentum tensor

2015/10/02 by Cédric Lorcé, Lorcé, Cédric
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th) #hep-ph #nucl-th

paper · pdf · doi:10.48550/arxiv.1510.00514

10 pages, contribution to the proceedings of the QCD Evolution 2015 Workshop, May 26-30, Jefferson Lab, Newport News, Virginia,USA

arxiv created 2015/10/02 · arxiv updated 2015/10/05

Abstract

We present the first complete parametrization for the matrix elements of the generic light-front gauge-invariant energy-momentum tensor, derive the expressions giving separately the spin and orbital angular momentum of quarks and gluons as probed in high-energy scattering experiments, and discuss the relations with two-parton generalized and transverse-momentum dependent distributions. As a by-product, we recovered the Burkardt sum rule, clarified its physical meaning and obtained similar new sum rules for higher-twist distributions.

Related

• Gluon contribution to the angular momentum distribution of a dressed quark state
• Spatial distribution of Angular Momentum Inside a Quark State Dressed with a Gluon
• Subleading Twist-3 Gluon Generalized Parton Distributions in the Light-Front Model
• Consistency of pion form factor and unpolarized transverse momentum dependent parton distributions beyond leading twist in the light-front quark model
• The partonic structure of the nucleon from generalized transverse momentum-dependent parton distributions