In-Medium K+ and K- Production and K- Condensation in Supernova Matter
GUO Hua1,4, ZHOU Ran1, LIU Yu-Xin1,2,4, LIU Bo3,4, LI Xi-Guo4
1Department of Technical Physics and MOE Laboratory of Heavy Ion Physics, Peking University, Beijing 100871
2Department of Physics, Peking University, Beijing 100871
3Institute of High Energy Physics, Chinese Academy of Sciences,Beijing 100039
4Centre of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000
In-Medium K+ and K- Production and K- Condensation in Supernova Matter
1Department of Technical Physics and MOE Laboratory of Heavy Ion Physics, Peking University, Beijing 100871
2Department of Physics, Peking University, Beijing 100871
3Institute of High Energy Physics, Chinese Academy of Sciences,Beijing 100039
4Centre of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000
Abstract： In-medium effects and neutrino trapping on K+ and K- production and K- condensation in supernova matter are investigated in a chiral hadronic model. Our results show that neutrino trapping shifts the critical density for K- condensation to higher density, the Q values for K+ and K- production are not sensitive to neutrino trapping, in-medium effects decrease the Q values for NN → NNK+K- and ΛN → NNK- and increase those for NN → NΛK+, K-p → Λπ0 and K-n → Λπ- as the density of supernova matter increases. Moreover, it is shown that neutrino trapping decreases the maximum masses of protoneutron stars compared with the neutrino-free case.
(Forces in hadronic systems and effective interactions)
引用本文:
GUO Hua;ZHOU Ran;LIU Yu-Xin;;LIU Bo;LI Xi-Guo. In-Medium K+ and K- Production and K- Condensation in Supernova Matter[J]. 中国物理快报, 2004, 21(5): 817-820.
GUO Hua, ZHOU Ran, LIU Yu-Xin, , LIU Bo, LI Xi-Guo. In-Medium K+ and K- Production and K- Condensation in Supernova Matter. Chin. Phys. Lett., 2004, 21(5): 817-820.
2004, Vol. 21 
