In-medium hadron properties from a Holographic QCD model

초록

We discuss hadron properties and their interaction vertices in the framework of the Sakai-Sugimoto model, introducing the medium eects via the zeroth component of a U(1) eld in the fifth dimension. The spin components being removed by rescaling wavefunctions in conformally at coordinates, the 5D action of the model is reduced to the following form: $S_{5D}= \int dw d^4 x \bar{\Psi}(x,w) (i gamma^M \partial_M - m_5(w) - N_c A \gamma^0) \Psi(x,w) + other terms, where A is the zeroth component U(1) gauge field. The equation of motiona can be derived by taking a variation of this action.