Poincare' covariant light-front spectral function and transverse momentum distribution

Abstract

In valence approximation the fermion correlator is simply related to the light-front spectral function. Then the leading twist time-reversal even transverse momentum distributions can be explicitly obtained from the light-front wave function of the system and the twist-three distributions are linear combinations of the transverse distributions at leading twist.

Comments: 4 pages, talk given at the XXII International Conference on Few-Body Problems in Physics (FB22), Caen, France, July 9 - 13, 2018