η′ meson under partial restoration of chiral symmetry in nuclear medium

• 慈道, 大介

• Sakai, Shuntaro

• Nagahiro, Hideko

• Hirenzaki, Satoru

• Ikeno, Natsumi

抄録

In-medium modification of the η′ mass is discussed in the context of partial restoration of chiral symmetry in nuclear medium. We emphasize that the U_A(1) anomaly effects cause the η′–η mass difference necessarily through the chiral symmetry breaking. As a consequence, the η′ mass is expected to be reduced by order of 100 MeV in nuclear matter where about 30% reduction of chiral symmetry takes place. The strong attraction relating to the η′ mass generation eventually implies that there should be also a strong attractive interaction in the scalar channel of the η′–N two-body system. We find that the attraction can be strong enough to form a bound state.

収録刊行物

• Nuclear Physics A

  Nuclear Physics A 914 354-359, 2013-09

  Elsevier B.V.

キーワード

• η′ meson mass
• Chiral symmetry restoration
• η′–N interaction
• Linear σ model

詳細情報

• CRID: 1050845760707958400
• NII論文ID: 120005324899
• NII書誌ID: AA00760032
• ISSN: 03759474
• HANDLE: 2433/178740
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles