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Understanding the structure of d*(2380) in chiral quark model
Huang, F; Shen PN(沈彭年); Dong YB(董宇兵); Zhang ZY(张宗烨); Shen, PN; Dong, YB; Zhang, ZY
AbstractThe structure and decay properties of d* have been detailedly investigated in both the chiral SU(3) quark model and the extended chiral SU(3) quark model that describe the energies of baryon ground states and the nucleon-nucleon (NN) scattering data satisfactorily. By performing a dynamical coupled-channels study of the system of Delta Delta and hidden-color channel (CC) with quantum numbers I(J(P)) = 0(3(+)) in the framework of the resonating group method (RGM), we find that the d* has a mass of about 2.38-2.42 GeV and a root-mean-square radius (RMS) of about 0.76-0.88 fm. The channel wave function is extracted by a projection of the RGM wave function onto the physical basis, and the fraction of CC component in the d* is found to be about 66%-68%, which indicates that the d* is a hexaquark-dominated exotic state. Based on this scenario the partial decay widths of d* -> d pi(0)pi(0) and d*-> d pi (+)pi(-) are further explicitly evaluated and the total width is then obtained by use of the branching ratios extracted from the measured cross sections of other possible decay channels. Both the mass and the decay width of d* calculated in this work are compatible with the data (M approximate to 2380 MeV, Gamma approximate to 70 MeV) reported by WASA-at-COSY Collaboration.
Keywordhexaquark state d*(2380) quark model hidden-color channel
Indexed BySCI ; ADS
WOS IDWOS:000368074700003
ADS Bibcode2016SCPMA..59b5767H
ADS URLhttps://ui.adsabs.harvard.edu/abs/2016SCPMA..59b5767H
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2016SCPMA..59b5767H/citations
Citation statistics
Cited Times:27 [INSPIRE]
Cited Times:21 [ADS]
Document Type期刊论文
Recommended Citation
GB/T 7714
Huang, F,Shen PN,Dong YB,et al. Understanding the structure of d*(2380) in chiral quark model[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2016,59(2):622002.
APA Huang, F.,沈彭年.,董宇兵.,张宗烨.,Shen, PN.,...&Zhang, ZY.(2016).Understanding the structure of d*(2380) in chiral quark model.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,59(2),622002.
MLA Huang, F,et al."Understanding the structure of d*(2380) in chiral quark model".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 59.2(2016):622002.
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