Speaker
Dr
Jacek Rozynek
(SINS, Warsaw, Poland.)
Description
Our model calculations performed in the frame of relativistic mean field (RMF) approach shows how important are the modifications of nucleon mass (particularly for those models with stiff Equation o State (EoS)). They allow to explain the EMC effect in saturation and restore the momentum sum rule badly violated by the nuclear parton structure in nuclear medium for finite pressure. The finite pressure corrections emerges from Hugenholtz-van Hove theorem of nuclear matter. The presented analysis of the nuclear distribution function in the Bjorken limit ask to modify the nucleon mass (consistent with deeply inelastic scattering) above the saturation point and to solve modified RMF equations. In the presented work we argue that nucleon structure function above saturation point has the same form as in the saturated nuclear matter. Consequently the decrease on nucleon mass was obtained making the EoS softer. This changes the compressibility K; for example from K=540MeV to 300MeV in Walecka model. Also the modified EoS in this model is close to extensive DBHF calculations with Bonn potential. However our model - an extension of nuclear RMF, has no additional parameters.
Primary author
Dr
Jacek Rozynek
(SINS, Warsaw, Poland.)
