skip to main content

SciTech ConnectSciTech Connect

Title: Relating the strangeness content of the nucleon with the mass shift of the ϕ meson in nuclear matter

The behavior of the ϕ meson at finite density is studied, making use of a QCD sum rule approach in combination with the maximum entropy method. It is demonstrated that a possible mass shift of the ϕ in nuclear matter is strongly correlated to the strangeness content of the nucleon, which is proportional to the strange sigma term, σ{sub sN}. In contrast to earlier studies, our results show that, depending on the value of σ{sub sN}, the ϕ meson could receive both a positive or negative mass shift at nuclear matter density. We find that these results depend only weakly on potential modifications of the width of the ϕ meson peak and on assumptions made on the behavior of four-quark condensates at finite density.
Authors:
 [1] ;  [2] ;  [3]
  1. ECT*, Villa Tambosi, 38123 Villazzano (Trento) (Italy)
  2. (Japan)
  3. Tokyo Institute of Technology, Meguro 2-12-1, Tokyo 152-8551 (Japan)
Publication Date:
OSTI Identifier:
22499081
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1701; Journal Issue: 1; Conference: 11. conference on quark confinement and hadron spectrum, Saint Petersburg (Russian Federation), 8-12 Sep 2014; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CALCULATION METHODS; DENSITY; ENTROPY; MESONS; NEGATIVE MASS; NUCLEAR MATTER; NUCLEONS; QUANTUM CHROMODYNAMICS; QUARK CONDENSATION; STRANGENESS; SUM RULES