Abstract
I investigate modifications of mass and decay width of in nuclear matter in a chiral symmetric way. The nucleon and are introduced by a parity doublet model, and nuclear matter is constructed by one-loop diagrams of the nucleon and . The decay width of is studied with respect to chiral symmetry. My calculations show that the partial width of is slightly broadened by a collisional broadening and that of is drastically suppressed at density. As a result, the total decay width gets small at density. These modifications, especially the drastic narrowing of partial width of , together with the drop in mass of , provide experiments for observing the partial restoration of chiral symmetry in nuclear matter by means of resonance with useful information.
3 More- Received 1 June 2017
- Revised 14 January 2018
DOI:https://doi.org/10.1103/PhysRevC.97.045203
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