Twist-4 T-even proton TMDs in the light-front quark-diquark model

Abstract

We have dealt with the twist-4 T-even transverse momentum dependent parton distributions (TMDs) for the case of proton in the light-front quark-diquark model (LFQDM). By decoding the unintegrated quarkquark correlator for the semi-inclusive deep inelastic scattering (SIDIS), we have specifically obtained the overlap form for the unpolarized f ν 3 (x, p 2 ⊥ ) , longitudinally polarized g ν 3L (x, p 2 ⊥ ), h ⊥ν 3L (x, p 2 ⊥ ) and transversely polarized g ν 3T (x, p 2 ⊥ ), h ν 3T (x, p 2 ⊥ ) and h ν⊥ 3T (x, p 2 ⊥ ) proton TMDs. We have provided the explicit expressions for both the cases of the diquark being a scalar or a vector. Average transverse momenta and the average square transverse momenta for the TMDs have been calculated and the results have been tabulated with corresponding leading twist TMDs. In addition, the value of average transverse momentum and average square transverse momentum for TMD f ν 3 (x, p 2 ⊥ ) has been compared with the available light-front constituent quark model (LFCQM) results. From TMDs, we have also obtained and discussed the transverse momentum dependent parton distribution functions (TMDPDFs). The model relations of the twist-4 T-evenTMDs with the available leading twist T-even TMDs have also been obtained.

Sub-leading twist transverse momentum dependent parton distributions in the light-front quark-diquark model

“…Sub-leading and higher twist distributions for hadrons have been discussed in Refs. [91,94,105,107,109,137,[145][146][147][148][149][150][151][152][153][154]. Specifically, sub-leading twist T-even unpolarized TMDs e ν (x, p 2 ⊥ ) and f ⊥ν (x, p 2 ⊥ ) have been discussed for spin− 1 2 baryons in Refs.…”