Strange goings on in dense nucleonic matter |
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| Affiliation: | 1. Helmholtz-Zentrum Dresden-Rossendorf, PF 510119, D-01314 Dresden, Germany;2. University of Graz, Institute of Physics, NAWI Graz, A-8010 Graz, Austria;3. Technische Universität Dresden, Institut für Theoretische Physik, D-01062 Dresden, Germany;1. Department of Physics, Tsinghua University, Beijing, 100084, China;2. Center for High Energy Physics, Tsinghua University, Beijing, 100084, China;1. Inter University Center for Astronomy and Astrophysics, Pune, 411007, India;2. Indian Institute of Technology Gandhinagar, Palaj, Gandhinagar, 382055, India;3. Institut für Theoretische Physik, Goethe Universität, Max von Laue Str. 1, Frankfurt am Main, 60438, Germany;1. Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan;2. Institute of Particle and Nuclear Studies, KEK, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan;3. Graduate University for Advanced Studies (Sokendai), Tsukuba 305-0801, Japan;4. RIKEN iTHEMS, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;1. Indian Institute of Technology Bhilai, GEC Campus, Sejbahar, Raipur 492015, Chhattisgarh, India;2. Guangdong Provincial Key Laboratory of Nuclear Science, Institute of Quantum Matter, South China Normal University, Guangzhou 510006, China;3. Guangdong-Hong Kong Joint Laboratory of Quantum Matter, Southern Nuclear Science Computing Center, South China Normal University, Guangzhou 510006, China;4. Ludwig-Maximilians-Universitat, Theresienstraße 37, 80333 Munchen, Germany |
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| Abstract: | It has been suggested that charged pions form a Bose-Einstein condensate in baryonic matter at zero temperature and about twice nuclear density. In this letter it is shown that at somewhat higher densities one finds a charged kaon condensate, driven to a large extent by the “stgma term” interaction with baryons. Using the SU(3) × SU(3) chiral lagrangian to model meson-baryon interactions it is found that baryonic matter acquires a strangeness-per-baryon ratio approaching one at several times nuclear density. The relevance of kaon condensation as a route to strange matter and its role in neutron stars are discussed. |
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