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Phys. Rev. C 68, 035803 (2003) [5 pages]

Effects of neutrino trapping on K and K̅ production and K̅ condensation in supernova matter

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Guo Hua1,2, Chen Yanjun1, Liu Bo2,3, Zhao Qi4, and Liu Yuxin1,2,5
1Department of Technical Physics and MOE Laboratory of Heavy Ion Physics, Peking University, Beijing 100871, People’s Republic of China
2Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, People’s Republic of China
3Institute of High Energy Physics, Beijing 100039, People’s Republic of China
4Pingdingshan TV University, Pingdingshan 467000, People’s Republic of China
5Department of Physics, Peking University, Beijing 100871, People’s Republic of China

Received 28 April 2003; published 23 September 2003

Effects of neutrino trapping on K and K̅ production and K̅ condensation in supernova matter are studied in the density-dependent relativistic hadron field theory and in the nonlinear σ-ω model with the parameter set Tm1. Our results show that critical densities for K̅ condensation with neutrino trapping are shifted to higher densities compared with those of neutrino free. Threshold energies for K and K̅ production are not sensitive to the effects induced by neutrino trapping. Meanwhile, it is shown that the effects of neutrino trapping decrease the maximum masses of protoneutron stars.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.68.035803
DOI:
10.1103/PhysRevC.68.035803
PACS:
26.60.+c, 21.65.+f, 95.30.Cq, 25.30.Pt
 
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