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Prog. Theor. Phys. Supplement No.156 (2004) pp. 84-103

[ Full Text PDF : FREE ACCESS (359K) ]

Hyperon-Mixed Neutron Stars

Tatsuyuki Takatsuka*

Faculty of Humanities and Social Sciences, Iwate University, Morioka 020-8550, Japan

Abstract:

Hyperon mixing in neutron star matter is investigated by the G-matrix-based effective interaction approach under the attention to use the YN and the YY potentials compatible with hypernuclear data and is shown to occur at densities relevant to neutron star cores, together with discussions to clarify the mechanism of hyperon contamination. It is remarked that developed Y-mixed phase causes a dramatic softening of the neutron star equation of state and leads to the serious problem that the resulting maximum mass M max for neutron star model contradicts the observed neutron star mass (M max<M obs = 1.44 M⊙), suggesting the necessity of some “extra repulsion” in hypernuclear system. It is shown that the introduction of three-body repulsion similar to that in nuclear system can resolve the serious situation and under the consistency with observation (M max > M obs) the threshold densities for Λ and Σ- are pushed to higher density side, from ∼2ρ0 to ∼4ρ0 (ρ0 being the nuclear density). On the basis of a realistic Y-mixed neutron star model, occurrence of Y-superfluidity essential for “hyperon cooling” scenario is studied and both of Λ- and Σ--superfluids are shown to be realized with their critical temperatures 108-9 K, meaning that the “hyperon cooling” is a promising candidate for a fast non-standard cooling demanded for some neutron stars with low surface temperature. A comment is given as to the consequence of less attractive ΛΛ interaction suggested by the “NAGARA event” 6ΛΛHe.


URL : http://ptp.ipap.jp/link?PTPS/156/84/
DOI : 10.1143/PTPS.156.84


*E-mail: takatuka@iwate-u.ac.jp

[ Full Text PDF : FREE ACCESS (359K) ] Citation:

References:

  1. S. Nishizaki, Y. Yamamoto and T. Takatsuka, Prog. Theor. Phys. 105 (2001), 607[PTP].
  2. Y. Yamamoto, S. Nishizaki and T. Takatsuka, Proc. 7th Int. Cont. on Hypernuclear and Strange Particle Physics (HYP2000), Torino, Italy, Oct. 23-27, 2000, ed. E. Botta, T. Bressani and A. Feliciello, Nucl. Phys. A 691 (2001), 432[CrossRef].
  3. T. Takatsuka, S. Nishizaki and Y. Yamamoto, Proc. 16th Int. Symp. on Perspectives in Physics with Radioactive Isotope Beams (RIB2000), Hayama, Kanagawa, Japan, Nov. 13-16, 2000, Eur. Phys. J. A 13 (2002), 213[CrossRef].
  4. S. Nishizaki, Y. Yamamoto and T. Takatsuka, Prog. Theor. Phys. 108 (2002), 703[PTP].
  5. S. Tsuruta and A. G. W. Cameron, Can. J. Phys. 44 (1966), 1895.
  6. W. D. Langer and L. Rosen, Astrophys. Space Sci. 6 (1970), 217.
  7. V. R. Pandharipande, Nucl. Phys. A 178 (1971), 123[CrossRef].
  8. H. A. Bethe and M. B. Johnson, Nucl. Phys. A 230 (1974), 1[CrossRef].
  9. M. Baldo, G. F. Burgio and H.-J. Schulze, Phys. Rev. C 61 (2000), 055801[APS].
  10. I. Vidaña, A. Polls, A. Ramos, L. Engvik and M. Hjorth-Jensen, Phys. Rev. C 62 (2000), 035801[APS].
  11. N. K. Glendenning, Phys. Lett. B 114 (1982), 392[CrossRef]; Nucl. Phys. A 493 (1989), 521[CrossRef]; Phys. Rev. C 64 (2001), 025801[APS].
  12. F. Weber and M. K. Weigel, Nucl. Phys. A 505 (1989), 779[CrossRef].
  13. Y. Sugahara and H. Toki, Prog. Theor. Phys. 92 (1994), 803[PTP].
  14. F. Schaffner and I. N. Mishustin, Phys. Rev. C 53 (1996), 1416[APS].
  15. S. Pal, M. Hanauske, I. Zakout, H. Stöcker and W. Greiner, Phys. Rev. C 60 (1999), 015802[APS].
  16. M. Hanauske, D. Zschiesche, S. Pal, S. Schramm, H. Stöcker and W. Greiner, Astrophys. J. 537 (2000), 958[IoP STACKS].
  17. P. K. Sahu and A. Ohnishi, Nucl. Phys. A 691 (2001), 439[CrossRef].
  18. T. Muto, Nucl. Phys. A 691 (2001), 447[CrossRef].
  19. Z. X. Ma, Z. G. Dai and T. Lu, Astron. Astrophys. 366 (2001), 532[CrossRef].
  20. J. S. -Bielich, M. Hanauske, H. Stöcker and W. Greiner, Phys. Rev. Lett. 89 (2002), 171101[APS].
  21. S. Balberg and A. Gal, Nucl. Phys. A 625 (1997), 435[CrossRef].
  22. T. Nagae et al., Phys. Rev. Lett. 80 (1998), 1605[APS].
  23. T. Fukuda et al., Phys. Rev. C 58 (1998), 1306[APS].
  24. Y. Yamamoto and H. Bando, Prog. Theor. Phys. Suppl. No. 81 (1985), 9[PTP].
  25. C. B. Dover and A. Gal, Prog. Part. Nucl. Phys. 12 (1984), 171.
  26. T. Harada, S. Shinmura, Y. Akaishi and H. Tanaka, Nucl. Phys. A 507 (1990), 715[CrossRef].
  27. T. Harada, Phys. Rev. Lett. 81 (1998), 5257[APS].
  28. C. J. Batty, E. Friedman and A. Gal, Prog. Theor. Phys. Suppl. No. 117 (1994), 227[PTP].
  29. Y. Yamamoto, S. Nishizaki and T. Takatsuka, Prog. Theor. Phys. 103 (2000), 981[PTP].
  30. M. Danysz et al., Nucl. Phys. 49 (1963), 121[CrossRef].
  31. S. Aoki et al., Prog. Theor. Phys. 85 (1991), 1287[PTP].
  32. H. Takahashi et al., Phys. Rev. Lett. 87 (2001), 212502[APS].
  33. Y. Yamamoto, T. Motoba, H. Himeno, K. Ikeda and S. Nagata, Prog. Theor. Phys. Suppl. No. 117 (1994), 361[PTP].
  34. T. Yamada and C. Nakamoto, Phys. Rev. C 62 (2000), 034319[APS].
  35. C. B. Dover, D. J. Millener, A. Gal and D. H. Davis, Phys. Rev. C 44 (1991), 1905[APS].
  36. M. M. Nagels, T. A. Rijken and J. J. de Swart, Phys. Rev. D 15 (1977), 2547[APS]; Phys. Rev. D 20 (1979), 1633[APS].
  37. T. A. Rijken, V. G. J. Stoks and Y. Yamamoto, Phys. Rev. C 59 (1999), 21[APS].
  38. B. Holzenkamp, K. Holinde and J. Speth, Nucl. Phys. A 500 (1989), 485[CrossRef].
  39. A. Reuber, K. Holinde and J. Speth, Nucl. Phys. A 570 (1994), 543[CrossRef].
  40. M. Oka, K. Shimizu and K. Yazaki, Prog. Theor. Phys. Suppl. No. 137 (2000), 1[PTP].
  41. K. Shimizu, S. Takeuchi and A. J. Buchmann, Prog. Theor. Phys. Suppl. No. 137 (2000), 43[PTP].
  42. Y. Fujiwara, C. Nakamoto and Y. Suzuki, Phys. Rev. Lett. 76 (1996), 2242[APS]; Phys. Rev. C 54 (1996), 2180[APS].
  43. Y. Fujiwara, M. Kono, C. Nakamoto and Y. Suzuki, Phys. Rev. C 64 (2001), 054001[APS].
  44. I. Arisawa, K. Nakagawa, S. Shinmura and M. Wada, Prog. Theor. Phys. 104 (2000), 995[PTP].
  45. T. Ueda, K. Tominaga, M. Yamaguchi, N. Kijima, D. Okamoto, K. Miyagawa and T. Yamada, Prog. Theor. Phys. 99 (1998), 891[PTP]; Nucl. Phys. A 642 (2000), 995.
  46. T. Takatsuka and R. Tamagaki, Prog. Theor. Phys. 102 (1999), 1043[PTP]; Nucl. Phys. A 670 (2000), 222[CrossRef].
  47. T. Takatsuka, S. Nishizaki, Y. Yamamoto and R. Tamagaki, Few-Body Systems Suppl. 12 (2000), 108.
  48. T. Takatsuka, S. Nishizaki, Y. Yamamoto and R. Tamagaki, Prog. Theor. Phys. 105 (2001), 179[PTP].
  49. T. Takatsuka, S. Nishizaki, Y. Yamamoto and R. Tamagaki, Nucl. Phys. A 691 (2001), 254[CrossRef]; Prog. Theor. Phys. Suppl. No. 146 (2002), 279[PTP].
  50. T. Takatsuka and R. Tamagaki, Proc. 16th Int. Conf. on Particles and Nuclei, Osaka, Japan, Sep. 30-Oct., 2002, ed. H. Toki, K. Imai and T. Kishimoto, Nucl. Phys. A 721 (2003), C1003[CrossRef].
  51. S. Balberg and N. Barnea, Phys. Rev. C 57 (1998), 409[APS].
  52. T. Tanigawa, M. Matsuzaki and S. Chiba, Phys. Rev. C 68 (2002), 015801[APS].
  53. S. Tsuruta, Comments Astrophys. 11 (1986), 151.
  54. C. J. Pethick, Rev. Mod. Phys. 64 (1992), 1133[APS].
  55. S. Tsuruta, Proc. US-Japan Joint Seminar on The Structure and Evolution of Neutron Stars, Kyoto, Japan, Nov. 6-10, 1990, ed. D. Pines, T. Tamagaki and S. Tsuruta (Addison-Wesley, 1992), p. 371.
  56. S. Tsuruta, Phys. Rep. 292 (1998), 1[CrossRef].
  57. D. Page and J. H. Applegate, Astrophys. J. 394 (1992), L17[CrossRef].
  58. T. Takatsuka, S. Nishizaki, Y. Yamamoto and R. Tamagaki, in preparation.
  59. S. Nishizaki, T. Takatsuka, N. Yahagi and J. Hiura, Prog. Theor. Phys. 86 (1991), 853[PTP].
  60. R. V. Reid, Ann. of Phys. 50 (1968), 411[CrossRef].
  61. S. Nishizaki, T. Takatsuka and J. Hiura, Prog. Theor. Phys. 92 (1994), 93[PTP].
  62. I. E. Lagaris and V. R. Pandharipande, Nucl. Phys. A 369 (1981), 470[CrossRef].
  63. B. Friedman and V. R. Pandharipande, Nucl. Phys. A 361 (1981), 502[CrossRef].
  64. R. B. Wiringa, R. A. Smith and T. L. Ainsworth, Phys. Rev. C 29 (1984), 1207[APS].
  65. M. Lacombe, B. Loiseau, J. M. Richard, R. Vinh Mau, J. Côtê, P. Pirés and R. de Tourreil, Phys. Rev. C 21 (1980), 861[APS].
  66. A. Akmal, V. R. Pandharipande and D. G. Ravenhall, Phys. Rev. C 58 (1998), 1804[APS].
  67. R. B. Wiringa, Rev. Mod. Phys. 65 (1993), 231[APS].
  68. T. Takatsuka and R. Tamagaki, Prog. Theor. Phys. Suppl. No. 112 (1993), 27[PTP].
  69. R. Tamagaki and T. Takatsuka, Prog. Theor. Phys. 105 (2001), 1059[PTP].
    R. Tamagaki, Prog. Theor. Phys. 39 (1968), 91[PTP].
  70. T. Takatsuka and R. Tamagaki, submitted to Prog. Theor. Phys.
  71. E. Flowers, M. Runderman and P. Sutherland, Astrophys. J. 205 (1976), 541[CrossRef].
  72. D. G. Yakovlev, A. D. Kaminker, O. Y. Gnedin and P. Haensel, Phys. Rep. 351 (2001), 1[CrossRef].
  73. S. Tsuruta, review paper presented at IAU Symposium, Sydney, Australia, July 2003.
  74. E. Hiyama, M. Kamimura, T. Motoba, T. Yamada and Y. Yamamoto, Phys. Rev. C 66 (2002), 024007[APS].
  75. R. Tamagaki and T. Takatsuka, Soryushiron Kenkyu (Kyoto) 106 (2002), B85.
  76. K. Kasahara, Y. Akaishi and H. Tanaka, Prog. Theor. Phys. Suppl. No. 56 (1974), 96[PTP].
  77. A. M. Green and P. Haapakoski, Nucl. Phys. A 221 (1974), 429[CrossRef].
  78. R. Brockmann and R. Machleidt, Phys. Rev. C 42 (1990), 1965[APS].
  79. G. E. Brown, W. Weise, G. Baym and J. Speth, Comments Nucl. Part. Phys. 17 (1987), 39.
  80. A. B. Santra and U. Lombardo, Phys. Rev. C 62 (2000), 018202[APS].
  81. T. Takatsuka and R. Tamagaki, Prog. Theor. Phys. 97 (1997), 345[PTP].
  82. T. Takatsuka and R. Tamagaki, Prog. Theor. Phys. 94 (1995), 457[PTP].
  83. S. Tsuruta, M. A. Tefer, T. Takatsuka, T. Tatsumi and R. Tamagaki, Astrophys. J. 571 (2002), L143[IoP STACKS].
  84. T. Takatsuka and R. Tamagaki, Prog. Theor. Phys. 101 (1999), 1043[PTP].

Citing Article(s) :

  1. Progress of Theoretical Physics Vol. 115 No. 2 (2006) pp. 355-379 :
    Occurrence of Hyperon Superfluidity in Neutron Star Cores
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  2. Progress of Theoretical Physics Vol. 115 No. 5 (2006) pp. 909-929 :
    Charge Neutral Two-Flavor Quark Matter in the Instanton Vacuum and Compact Stars
    Hiyoshi Kiuchi and Makoto Oka
  3. Progress of Theoretical Physics Supplement No.168 (2007) pp. 623-626 :
    Kaon-Condensed Hypernuclei
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  4. Progress of Theoretical Physics Supplement No. 174 (2008) pp. 80-83 :
    Three-Body Force as an “Extra Repulsion” Suggested from Hyperon-Mixed Neutron Stars
    Tatsuyuki Takatsuka, Shigeru Nishizaki and Ryozo Tamagaki

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