QCD sum rules for the mass, residue and self-enegryof nucleon in cold nuclear matter

In this thesis, the mass, residue and self-energies of the nucleon in cold nuclear medium are calculated in the framework of the QCD sum rules method by using the interpolating current of the nucleon, including the Ioffe value of the mixing parameter . Firstly, the reliable regions of the auxiliary parameters required for the calculations are determined in accordance with the philosophy of this method. Then, we present these physical quantities showing stability with respect to these auxiliary parameters in their obtained working regions. In the limit of ρ→0, we obtain our vacuum results. It is then calculated that the mass and residue of the nucleon showed negative shifts due to the cold nuclear matter. These shifts are obtained using the mean values of the auxiliary parameters and at the saturation nuclear matter density. The negative shifts on the mass is %31 and on the residue is %11. In addition, in the density interval ρ = [0 - 1:5]ρsat, the modified mass and residue of nucleon show almost linear decrease due to the increasing medium density. Another important result is obtained that our results for the vector and scalar self-energies of nucleon being a good agreement with the literature. It is important to investigate the physical properties of the hadrons in the cold and dense nuclear medium, as opposed to vacuum, to evaluate the results of heavy ion collision experiments, and to better understand the internal structures of dense objects such as neutron stars. Our results may shed light on the planned medium experiments in the near future and may also be helpful in theoretical and phenomenological studies related to the behavior of other hadrons in the dense medium.