EMC and Polarized EMC Effects in Nuclei

Abstract

We determine nuclear structure functions and quark distributions for ${}^7$Li, ${}^{11}$B, ${}^{15}$N and ${}^{27}$Al. For the nucleon bound state we solve the covariant quark-diquark equations in a confining Nambu--Jona-Lasinio model, which yields excellent results for the free nucleon structure functions. The nucleus is described using a relativistic shell model, including mean scalar and vector fields that couple to the quarks in the nucleon. The nuclear structure functions are then obtained as a convolution of the structure function of the bound nucleon with the light-cone nucleon distributions. We find that we are readily able to reproduce the EMC effect in finite nuclei and confirm earlier nuclear matter studies that found a large polarized EMC effect.

8 pages, 9 figures

References in corpus (1)

• Coulomb distortion of relativistic electrons in the nuclear electrostatic field

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