奇异数为-5的双重子态结构
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摘要
在手征SU(3)夸克模型和推广SU(3)手征夸克模型下,应用共振群方法研究了奇异数为-5的双重子系统的结构,主要分析了标量介子混合角对系统结合能的影响.结果表明,无论是哪种混合,双重子Ξ*Ω都是束缚态.在手征夸克模型下,混合角为-18°和19°时,Ξ*Ω系统结合能大致相同;但在理想混合下,因为σ场没有贡献,系统的结合能会大大减少.同时还发现,考虑混合角时的结合能远小于不考虑混合角时的结合能.本文工作对标量介子混合角问题的研究提供了一些有意义的信息.
In the chiral SU(3)quark model and extended chiral SU(3)quark model,we study the structure of strangeness-5dibaryon by solving a Resonating Group Method equation.The effects from the mixing of scalar mesons are analyzed in the chiral SU(3)quark model,the binding energies are almost the same for-18°and 19°mixing cases.But the binding energy is reduced quite a lot for ideal mixing case,since there is no contribution fromσmeson.Compared with the results of no mixing case,the binding energies are reduced a lot for any ming cases.The present work might be helpful in understanding the question of mixing of scalar mesons.
In the chiral SU(3)quark model and extended chiral SU(3)quark model,we study the structure of strangeness-5dibaryon by solving a Resonating Group Method equation.The effects from the mixing of scalar mesons are analyzed in the chiral SU(3)quark model,the binding energies are almost the same for-18°and 19°mixing cases.But the binding energy is reduced quite a lot for ideal mixing case,since there is no contribution fromσmeson.Compared with the results of no mixing case,the binding energies are reduced a lot for any ming cases.The present work might be helpful in understanding the question of mixing of scalar mesons.
引文
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[23]DAI L R.The mixing of scalar mesons and the baryon-baryon interaction[J].Eur Phys J,2011,A47:26.
[24]BERINGER,ARGUIN J F,BARNETTR M,et al.(Particle Data Group).Review of particle physics[J].Phys Rev,2012,D86:010001.
[2]LI Q B,SHEN P N.Possible dibaryons with strangeness S=-5[J].Phys Rev,2000,C62:028202.
[3]LI Q B,SHEN P N,ZHANG Z Y,et al.Dibaryon systems in chiral SU(3)quark model[J].Nucl Phys,2001,A683:487-509.
[4]PANG R H,PING J L,WANG F,et al.The di-omega in the extended quark delocalization,color screening model[J].Phys Rev,2002,C66:025201.
[5]PANG R H,PING J L,WU H X.The study of dibaryon systems with strangeness on chiral quark model[J].Mod Phys Lett,2005,A20:69-77.
[6]戴连荣,李春然,佟蕾.非奇异双重子ΔΔ结合能计算[J].辽宁师范大学学报:自然科学版,2005,28(3):287-289.
[7]戴连荣,赵婧,张丹,等.比较ΝΩ和ΝΩ两个特殊系统[J].辽宁师范大学学报:自然科学版,2007,30(4):425-428.
[8]戴连荣,佟德鑫,白利慧,等.H粒子的结构[J].辽宁师范大学学报:自然科学版,2009,32(1):33-35.
[9]戴连荣,王昌波,刘京,等.进一步探讨H粒子的结构[J].辽宁师范大学学报:自然科学版,2013,36(1):26-30.
[10]戴连荣,刘京,袁琳,等.奇异数为-6的双重子结构[J].辽宁师范大学学报:自然科学版,2013,36(4):486-490.
[11]CHODOS A,JAFFE R L,JOHNSON K,et al.A new extended model of hadrons[J].Phys Rev,1974,D9:3471-3495.
[12]ISGUR N,KARLG.Hyperfine interaction in negative parity baryons[J].Phys Lett,1972,B72:109.
[13]GLOZMAN L YA,RISKA D O.The spectrum of the nucleons and the strange hyperons and chiral dynamics[J].Phys Rept,1996,268:263-303.
[14]FERNANDEZ F,VALCARCE A,STRAUB U,et al.The nucleon-nucleon interaction in terms of quark degrees of freedom[J].J Phys,1993,G19:2013-2026.
[15]VEITE A,BYRON K,JENNINGS,et al.Kaon-nucleon scattering in an extended cloudy bag model[J].Phys Lett,1984,B137:415.
[16]FRIEDBERG R,LEE T D.Fermion field nontopological solitons.2.models for hadrons[J].Phys Rev,1977,D16:2271-2289.
[17]KODAMA N,OKA M,HATSUDA T.Hdibaryon in the QCD sum rule[J].Nucl Phys,1994,A580:445-454.
[18]张宗烨,余友文,戴连荣.SU(3)模型中夸克与手征场的相互作用[J].高能物理与核物理,1996,20:393.
[19]ZHANG Z Y,YU Y W,SHEN P N,et al.The Hyperon-nucleon interactions in a chiral SU(3)quark model[J].Nucl Phys,1997,A625:59-70.
[20]DAI L R,ZHANG Z Y,YU Y W,et al.N-Ninteractions in the extended chiral SU(3)quark model[J].Nucl Phys,2003,A727:321-332.
[21]HUANG F,ZHANG Z Y,YU Y W.Resonating group method study of kaon-nucleon elastic scattering in the chiral SU(3)quark model[J].Phys Rev,2004,C70:044004.
[22]HUANG F,ZHANG Z Y.Kaon-nucleon interaction in the extended SU(3)quark model[J].Phys Rev,2005,C72:024003.
[23]DAI L R.The mixing of scalar mesons and the baryon-baryon interaction[J].Eur Phys J,2011,A47:26.
[24]BERINGER,ARGUIN J F,BARNETTR M,et al.(Particle Data Group).Review of particle physics[J].Phys Rev,2012,D86:010001.