Effect of δ Meson on Kaon Effective Mass

  • The density dependent relativistic hadron field theory(DDRH) containing meson δ is applied to very asymmetric nuclear matter. Because of the interaction between the nucleons and the scalar-isovector meson δ,the property of the asymmetric nuclear matter is so different from symmetric nuclear matter.The relations between scale density ρS and vector density ρB have been calculated. We also investigate the effective masses of nucleons in symmetric and asymmetric nuclear matter by using DDRH.The density dependence of in-medium kaon and antikaon effective masses has been obtained and then the effects of both the density dependence of the coupling constant Γi(ρ)(i=σ,ω,δ,ρ) and the scalar-isovector meson δ were discussed.
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  • [1] . Kaplan D B, Nelson A E. Phys. Lett., 1986, B175: 572. Nelson A E, Kaplan D B. Phys. Lett., 1987, B192: 1933. Brown G E, Kubodera K, Rho M. Phys. Lett., 1987, B192: 2734. Yabu H, Nakamura., Myhrer F. Phys. Lett., 1993, B315: 175. DAI Z G, CHENG K S. Phys. Lett., 1997, B401: 2196. GUO Hua, LIU Bo, LI Xi-Guo. HEP NP, 2003, 27(2): 113(in Chinese)(郭华, 刘波, 李希国. 高能物理与核物理, 2003, 27(2): 113) 7. Brown G E, Bethe H A. Astrophys. Jour., 1994, 423: 6598. LI G Q, LEE C H, Brown G E. Phys. Rev. Lett., 1997, 79: 52149. LI G Q, Ko C M, FANG X S. Phys.Lett., 1994, B329: 14910. LI G Q, Ko C M, LI Bao-An. Phys. Rev. Lett., 1995, 74: 23511. GAO Yuan, LI Xi-Guo, JIA Due-Jie. HEP NP, 2003, 27(11): 995(in Chinese)(高远, 李希国, 贾多杰. 高能物理与核物理, 2003, 27(11): 995)12. LI Xi-Guo, GAO Yuan, GUO Yan-Rui et al. HEP NP, 2004, 28(9): 973(in Chinese)(李希国, 高远, 郭艳蕊等. 高能物理与核物理, 2004, 28(9): 973)13. LI Xi-Guo, GUO Yan-Rui, GAO Yuan et al. Rev. Nuc. Phys., 2004, 21(3): 183(in Chinese)(李希国, 郭艳蕊, 高远等. 原子核物理评论, 2004, 21(3): 183)14. Lenske H, Fuchs C. Phys. Lett., 1995, B345: 35515. Fuchs C, Lenske H, Wolt er H. Phys. Rev., 1995, C52: 304316. Keil C M, Hofmann F, Lenske H. Phys. Rev., 2000, C61: 06430917. Hofmann F, Keil C M, Lenske H. Phys. Rev., 2001, C64: 03431418. Walecka J D. Ann. Phys. (N. Y.), 1974, 83: 49119. Serot B D, Walecka J D. Adv. Nucl. Phys., 1986, 16: 120. Serot B D, Walecka J D. Int. J. Mod. Phys., 1997, E6: 51521. Classing W, Bratkovskaya. Phys. Rep., 1999, 308: 6522. LI G Q, Brown G E. Nucl. Phys., 1997, A625: 372
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LI Xi-Guo, GAO Yuan, LIU Zi-Yu, GUO Yan-Rui and ZUO Wei. Effect of δ Meson on Kaon Effective Mass[J]. Chinese Physics C, 2004, 28(11): 1150-1153.
LI Xi-Guo, GAO Yuan, LIU Zi-Yu, GUO Yan-Rui and ZUO Wei. Effect of δ Meson on Kaon Effective Mass[J]. Chinese Physics C, 2004, 28(11): 1150-1153. shu
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Received: 2004-03-29
Revised: 1900-01-01
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Effect of δ Meson on Kaon Effective Mass

    Corresponding author: LI Xi-Guo,
  • Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Acce lerator of Lanzhou,Lanzhou 730000,China2 Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China3 Graduate School of The Chinese Academy of Sciences,Beijing,100049,China

Abstract: The density dependent relativistic hadron field theory(DDRH) containing meson δ is applied to very asymmetric nuclear matter. Because of the interaction between the nucleons and the scalar-isovector meson δ,the property of the asymmetric nuclear matter is so different from symmetric nuclear matter.The relations between scale density ρS and vector density ρB have been calculated. We also investigate the effective masses of nucleons in symmetric and asymmetric nuclear matter by using DDRH.The density dependence of in-medium kaon and antikaon effective masses has been obtained and then the effects of both the density dependence of the coupling constant Γi(ρ)(i=σ,ω,δ,ρ) and the scalar-isovector meson δ were discussed.

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