核物质中△(1 232)粒子的介质效应

The medium effect of △(1 232) in the nuclear matter

摘要: 利用手征有效场论，通过对核物质中核子传播子的修正，研究了核物质中的△(1 232)粒子的有效质量和衰变宽度。发现△(1 232)粒子的有效质量随核物质密度的增加而减小，而衰变宽度随核物质密度的增加而增加； △(1 232)粒子衰变宽度的变化主要取决于核子有效质量以及△(1 232)粒子有效质量的变化。 Based on the chiral effective field theory (CHEFT), we study the effective mass and decay width of △(1 232) in the nuclear matter with the modified nucleon propagator. We find that the effective mass of △(1 232) decreases, while the decay width of △(1 232) increases with increasing the density of nuclear matter. And the decay width of △(1 232) mainly depends on the effective masses of nucleon and △(1 232)

Abstract: Based on the chiral effective field theory (CHEFT), we study the effective mass and decay width of △(1 232) in the nuclear matter with the modified nucleon propagator. We find that the effective mass of △(1 232) decreases, while the decay width of △(1 232) increases with increasing the density of nuclear matter. And the decay width of △(1 232) mainly depends on the effective masses of nucleon and △(1 232)