Examination of N*(1535) as a probe to observe the partial restoration of chiral symmetry in nuclear matter

Daiki Suenaga
Phys. Rev. C 97, 045203 – Published 26 April 2018

Abstract

I investigate modifications of mass and decay width of N*(1535) in nuclear matter in a chiral symmetric way. The nucleon and N*(1535) are introduced by a parity doublet model, and nuclear matter is constructed by one-loop diagrams of the nucleon and N*(1535). The decay width of N*(1535) is studied with respect to chiral symmetry. My calculations show that the partial width of ΓN*Nπ is slightly broadened by a collisional broadening and that of ΓN*Nη is drastically suppressed at density. As a result, the total decay width Γtot gets small at density. These modifications, especially the drastic narrowing of partial width of ΓN*Nη, together with the drop in mass of N*(1535), provide experiments for observing the partial restoration of chiral symmetry in nuclear matter by means of N*(1535) resonance with useful information.

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  • Received 1 June 2017
  • Revised 14 January 2018

DOI:https://doi.org/10.1103/PhysRevC.97.045203

©2018 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Daiki Suenaga*

  • Department of Physics, Nagoya University, Nagoya 464-8602, Japan

  • *suenaga@hken.phys.nagoya-u.ac.jp

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Issue

Vol. 97, Iss. 4 — April 2018

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