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《中国物理C》（英文）编辑部
2024年10月30日
Chinese Physics C> 2005, Vol. 29> Issue(11) : 1067-1070 

In-Medium Effective of Pentaquark Θ+ in the Density Dependent Relativistic Hadron Field Theory

  •  Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China2 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Collisions,Lanzhou 730000,China3 Graduate University of Chinese Academy of Sciences,Beijing 100049,China

  • The density dependent relativistic hadron field theory is extended to inclusions of pentaquark Θ+. We have investigated the mass modifications of nucleons and pentaquark Θ+ in the framework of relativistic mean field theory. We find that the effective mass, of either the nucleon or the pentaquark Θ+ decreases as baryon density increases. We have studied the effects of the fractions of Θ+ and neutron on the baryon masses. We also discussed the relations between scale density ρS and vector density ρB at different baryon fractions.
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    [1] . Diakonov D, Petrov V, Polyakov M V. Z. Phys., 1997,A359(3): 3052. GAO Hai-Yan, MA Bo-Qiang. Mod. Phys. Lett., 1999,A14: 23133. Nakano T et al. Rev. Lett., 2003, 91: 0120024. Barmin V V, Borisov V S, Davidenko G V et al. Phys.Atom. Nucl., 2003, 66: 17155. Stepanyan S et al. Phys. Rev. Lett., 2003, 91: 2520016. Airapetian A et al. Phys. Lett., 2004, B585: 2137. Asratyan A E, Dolgolenko A G, Kubantsev M A. Phys.Atom. Nucl., 2004, 67: 6828. ZHU Shi-Lin. Int. J. Mod. Phys., 2004, A19: 34399. Dobaczewski J et al. Phys. Rev., 1996, C53: 280910. Brockmann R, Toki H. Phys. Rev. Lett., 1992, 68: 340811. Lenske H, Fuchs C. Phys. Lett., 1995, B345: 35512. Fuchs C, Lenske H, Wolter H H. Phys. Rev., 1995, C52:304313. Ineichen F,Weigel MK, Von-Eiff D. Phys. Rev., 1996, C53:215814. Cescato M L, Ring P. Phys. Rev., 1998, C57: 13415. Hofmann F, Keil C M, Lenske H. Phys. Rev., 2001, C64:03431416. LI Xi-Guo, GAO Yuan, LIU Zi-Yu. High Energy Phys. andNucl. Phys.,2004, 28(11): 1150(in Chinese)(李希国，高远，刘紫玉.高能物理与核物理，2004，28(11):1150)17. Walecka J D. Ann. Phys.(N.Y.), 1974, 83: 49118. Serot B D, Walecka J D. Adv. Nucl. Phys., 1986, 16: 119. Serot B D, Walecka J D. Int. J. Mod. Phys., 1997, E6: 51520. GAO Yuan, LI Xi-Guo, JIA Duo-Jie. High Energy Phys.and Nucl. Phys., 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)21. LI Xi-Guo, GAO Yuan. High Energy Phys. and Nucl. Phys.,2004, 28(9): 973(in Chinese)(李希国，高远.高能物理与核物理，2004, 28(9): 973)22. Pierre A M, Guichon, Koichi Saito et al. Nucl. Phys., 1996,A601: 34923. ZHONG X H, TAN Y H, LI L et al. arxiv: nucl-th/0408046

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GAO Yuan, LI Xi-Guo, LI Yong-Qing and LIU Jian-Ye. In-Medium Effective of Pentaquark Θ+ in the Density Dependent Relativistic Hadron Field Theory[J]. Chinese Physics C, 2005, 29(11): 1067-1070.
GAO Yuan, LI Xi-Guo, LI Yong-Qing and LIU Jian-Ye. In-Medium Effective of Pentaquark Θ+ in the Density Dependent Relativistic Hadron Field Theory[J]. Chinese Physics C, 2005, 29(11): 1067-1070. shu
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Received: 2005-02-03
Revised: 1900-01-01
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In-Medium Effective of Pentaquark Θ+ in the Density Dependent Relativistic Hadron Field Theory

    Corresponding author: LI Xi-Guo,
  • Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China2 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Collisions,Lanzhou 730000,China3 Graduate University of Chinese Academy of Sciences,Beijing 100049,China
  • Received Date: 2005-02-03
  • Accepted Date: 1900-01-01
  • Available Online: 2005-11-05

Abstract: The density dependent relativistic hadron field theory is extended to inclusions of pentaquark Θ+. We have investigated the mass modifications of nucleons and pentaquark Θ+ in the framework of relativistic mean field theory. We find that the effective mass, of either the nucleon or the pentaquark Θ+ decreases as baryon density increases. We have studied the effects of the fractions of Θ+ and neutron on the baryon masses. We also discussed the relations between scale density ρS and vector density ρB at different baryon fractions.

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