Casimir effect for nucleon parity doublets

Casimir effect for nucleon parity doublets

Finite-volume effects for the nucleon chiral partners are studied within the framework of the parity-doublet model. Our model includes the vacuum energy shift for nucleons, which is the Casimir effect. We find that for the antiperiodic boundary the finite-volume effect leads to chiral symmetry resto...

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Veröffentlicht in:Physical review. D 2019-03, Vol.99 (5), Article 054010
Hauptverfasser: Ishikawa, Tsutomu, Nakayama, Katsumasa, Suzuki, Kei
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Sprache:eng
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Broken symmetry
Nucleons
Parity
Restoration
Temperature dependence
Temperature effects
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creator Ishikawa, Tsutomu
Nakayama, Katsumasa
Suzuki, Kei
description Finite-volume effects for the nucleon chiral partners are studied within the framework of the parity-doublet model. Our model includes the vacuum energy shift for nucleons, which is the Casimir effect. We find that for the antiperiodic boundary the finite-volume effect leads to chiral symmetry restoration, and the masses of the nucleon parity doublets degenerate. For the periodic boundary, the chiral symmetry breaking is enhanced, and the masses of the nucleons also increase. We also discuss the finite-temperature effect and the dependence on the number of compactified spatial dimensions.
doi_str_mv 10.1103/PhysRevD.99.054010
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subjects Broken symmetry
Nucleons
Parity
Restoration
Temperature dependence
Temperature effects
title Casimir effect for nucleon parity doublets
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