# DIS 2015 - XXIII. International Workshop on Deep-Inelastic Scattering and Related Subjects

27 April 2015 to 1 May 2015
US/Central timezone

## Experimental Investigation of the Structure Functions of Bound Nucleons

29 Apr 2015, 09:45
25m
FORUM ()

### FORUM

WG1 Structure Functions and Parton Densities

### Speaker

Prof. Arie Bodek (University of Rochester (US))

### Description

We present results from a high precision experimental study of the nuclear modification of the longitudinal ($\sigma_L$) and transverse ($\sigma_T$) structure functions of nucleons bound in nuclear targets. The origin of these modifications (commonly referred as as the EMC effect) is not fully understood. Our measurements of R= $\sigma_L / \sigma_T$ for nuclei ($R_A$) and for deuterium ($R_D$) indicate that nuclear modifications of the structure functions of bound nucleons are different for the longitudinal and transverse structure functions, and that $R_A< R_D$ (which contrary to expectation from several theoretical models). The results could be interpreted as evidence for the softening of both the parallel and transverse momentum quarks in the nucleon, possibly resulting from partial quark de-confinement due to short range correlations. This additional nuclear effect should be implemented in cur

### Primary author

Prof. Arie Bodek (University of Rochester (US))

 Slides