Nucleon form factors in the nuclear medium

Abstract

By using the AdS/CFT correspondence, we investigate various form factors between nucleons and mesons in a nuclear medium. In order to describe a nuclear medium holographically, we take into account the thermal charged AdS geometry with an appropriate IR cutoff. After introducing an anomalous dimension as a free parameter, we investigate how the nucleon's mass is affected by the change of the anomalous dimension. Moreover, we study how the form factors of nucleons rely on the properties of the nuclear medium. We show that in a nuclear medium with different numbers of proton and neutron, the degenerated nucleon form factor in the vacuum is split to four different values depending on the isospin charges of nucleon and meson. *

Quantum correlation in quark-gluon medium

“…Originally, the string cloud model have been proposed as the relativistic dust cloud model for a perfect fluid which formulated as the Einstein gravity coupled with a one-dimensional strings instead of point particles [22][23][24][25]. Recently, this model has been paid attention to understand various properties associated with quark-gluon plasma (QGP) [26][27][28][29][30], a strongly coupled thermal state of matter, produced in the collision experiment of heavy nuclei [23,24]. Our aim in this work is to investigate macroscopic and microscopic quantum correlations in this deformed theory from the viewpoint of the entanglement entropy.…”