Pentaquark ${\Theta }^{+}$ mass and width in dense matter

Abstract

We investigate medium modifications of the pentaquark ${\Theta }^{+}$ in dense medium, taking into account different parities of the exotic ${\Theta }^{+}$ baryon. We find that the chemical potential of the ${\Theta }^{+}$ is shifted in a density-dependent way to one-loop order. We also investigated the effect of the scaled nucleon mass in dense medium on the ${\Theta }^{+}$ propagator. The results turn out to depend sensitively on the scaled nucleon mass and on the parity of the ${\Theta }^{+}$.

7 pages, 3 figures. Final version published in J. of. Kor. Phys. Soc