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题名: Theoretical investigation of the decay of the N(2120) resonance to nucleon resonances near 1.7 GeV
作者: Huang, Y;  He, J;  Chen, XR;  Wang, R;  Xie, JJ;  Zhang, HF
刊名: PHYSICAL REVIEW C
出版日期: 2015
卷号: 91, 期号:6, 页码:65202
学科分类: Physics
DOI: http://dx.doi.org/10.1103/PhysRevC.91.065202
通讯作者: He, J (reprint author), Lanzhou Univ, Res Ctr Hadron & CSR Phys, Lanzhou 730000, Peoples R China.
文章类型: Article
英文摘要: Background: Until now the knowledge about nucleon resonances with a mass higher than 2 GeV has been scarce. Huge amounts of experimental data of the multipion photoproduction have been accumulated, and more can be expected in the future in facilities such as JLab 12 GeV. It makes it possible to investigate the decay of a nucleon resonance into another nucleon resonance. Purpose: The possibility to research the decay of the N(2120) to nucleon resonances near 1.7 GeV in the three- pion photoproduction will be explored to provide useful information for future experimental study. Method: The pion and radiative decay amplitudes of nucleon resonances are studied within the constituent quark model, which is used to calculate the couplings constants, especially for the decay of a nucleon resonance near 2.1 GeV to another nucleon resonance near 1.7 GeV. The three- pion photoproduction off the neutron target, i.e.,gamma n -> pi(-) pi(-) Delta(++) -> pi(-) pi(-) pi(+)p, is investigated based on the effective Lagrangian method with the coupling constant obtained form the decay amplitudes. Results: The resonance contribution with a state N((PM)-P-2)3/2(-) near 2.1 GeV decaying to a state N((PM)-P-4)5/2(-) near 1.7 GeV, i.e., N(2120) -> N(1675) pi, is dominant in the process considered. The total cross section from the resonance contribution is at the order of 1 mu b and can be easily distinguished from the background. Conclusions: Our results suggest it is practicable to research the decay of the N(2120) to the N(1675) in experiment.
类目[WOS]: Physics, Nuclear
关键词[WOS]: RELATIVIZED QUARK-MODEL ;  BARYON RESONANCES ;  HIGHER SPIN ;  PHOTOPRODUCTION ;  CHROMODYNAMICS
收录类别: SCI
项目资助者: Major State Basic Research Development Program in China [2014CB845400] ;  National Natural Science Foundation of China [11275235, 11035006, 11175220] ;  Chinese Academy of Sciences [KJCX2-EW-N01, Y101020BR0]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/20959
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Recommended Citation:
Huang, Y,He, J,Chen, XR,et al. Theoretical investigation of the decay of the N(2120) resonance to nucleon resonances near 1.7 GeV[J]. PHYSICAL REVIEW C,2015,91(6):65202.
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