EMC and polarized EMC effects in nuclei

• Published in: Physics letters. B Vol. 642; no. 3; pp. 210 - 217
• Main Authors: Cloët, I.C., Bentz, W., Thomas, A.W.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 09-11-2006; Elsevier Science
• Subjects: Exact sciences and technology; Nuclear physics; Physics; The physics of elementary particles and fields; 12.39.Ki; 24.85.+p; 24.10.Jv; 25.30.Mr; 11.80.Jy; Nuclear structure; Bound state; Nambu Jona Lasinio model; Vector fields; Structure functions; Quarks; Shell models; Diquark; Convolution; Nucleons; Light cones; Nuclear matter; Scalar fields
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/j.physletb.2006.08.076

We determine nuclear structure functions and quark distributions for 7Li, 11B, 15N and 27Al. 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.