Nucleon structure functions and longitudinal spin asymmetries

¹ Department of Physics, Dr. B.R. Ambedkar National Institute of Technology, Jalandhar, 144011, India
² University Institute of Engineering and Technology, Panjab University, Chandigarh, 160014, India

^a e-mail: dahiyah@nitj.ac.in

Published online: 22 March 2017

Abstract

The chiral constituent quark model (χCQM) has been used to analyse the phenomenological dependence of the spin independent (F₁^{p, n} and F₂^{p, n}) and the spin dependent (g₂^{p, n}) structure functions of the nucleon on the the Bjorken scaling variable x. The implication of the presence of the sea quarks has been discussed for the p and n longitudinal spin asymmetries (A₁^p (x) and A₁ⁿ (x) ratio of polarized to unpolarized quark distribution functions for up and down quarks in the p and n $$\frac{\Delta u^p(x)}{u^p(x)}$$, $$\frac{\Delta d^p(x)}{d^p(x)}$$, $$\frac{\Delta u^n(x)}{u^n(x)}$$, and $$\frac{\Delta d^n(x)}{d^n(x)}$$. The results have been compared with the recent available experimental observations.