Anomalous enhancement of dilepton production as a precursor of color superconductivity
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- Toru Nishimura
- Department of Physics, Osaka University , Toyonaka, Osaka 560-0043, Japan
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- Masakiyo Kitazawa
- Department of Physics, Osaka University , Toyonaka, Osaka 560-0043, Japan
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- Teiji Kunihiro
- Yukawa Institute for Theoretical Physics, Kyoto University , Kyoto 606-8502, Japan
説明
<jats:title>Abstract</jats:title> <jats:p>We compute the modification of the photon self-energy due to dynamical diquark fluctuations developed near the critical temperature of two-flavor superconductivity, which is one of the color superconducting phases, through the Aslamasov–Larkin, Maki–Thompson, and density of states terms, which are responsible for the paraconductivity in metals at vanishing energy and momentum. The analysis is performed through an investigation of the diquark fluctuations within the normal phase determined by the mean-field approximation in the massless two-flavor Nambu–Jona-Lasinio model. It is shown that the rate has a significant enhancement in low-invariant-mass regions over a rather wide range of temperatures in the normal phase. This enhancement is worth exploring in the relativistic heavy-ion collisions, which may thereby reveal the significance of the diquark fluctuations in dense quark matter.</jats:p>
収録刊行物
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- Progress of Theoretical and Experimental Physics
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Progress of Theoretical and Experimental Physics 2022 (9), 093D02-, 2022-07-28
Oxford University Press (OUP)
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詳細情報 詳細情報について
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- CRID
- 1360861705565323264
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- ISSN
- 20503911
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- データソース種別
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