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Chinese Physics C> 2001, Vol. 25> Issue(6) : 521-525 

C(γ,η)X Reactions and Properties of N*(1535) in Nuclei

  •  Institute of High Energy Physics, The Chinese Academy of Sciences, Beijing 100039, China2 Center of Nuclear Theory, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China3 Institute of Theoretical Physics, The Chinese Academy of Sciences, Beijing 100080, China

  • The η photon production reaction on nuclei is studied by employing N*(1535) resonance model. The parameters of the model are extracted by using experimental data of N* decay channels and fitting γp→ηp reaction cross section. The result shows that the theoretical values are in good agreement with experimental data if MN*=1550MeV. The total cross section of the η photoproduction on 12C is calculated. We find that the width of N*(1535) in nuclei increases because of corrections of many-body effects, and the interaction between N* and nuclei has the feature of repulsion.
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    [1] .Bianch N et al.Phys.Lett.,1993,B299:219;Phys.Lett.,1993,B309:52.CHIANG H C,Oset E,LIU L C.Phys.Rev.,1991,C44:223.CHEN Lin,JIANG Huan-Qing.High Energy Phys.and Nucl.Phys.,1994,18:553(in Chinese)(陈林,姜焕清.高能物理与核物理,1994,18:553)4.CHEN L,CHIANG H C.Phys.Lett.,1994,B329:4245.Yorita T et al.Proc.of the 7th Conference on Mesons and Light Nuclei'98,ed.Adam J.et al.World Scientific:1999,906.Fetter A L,Walecka J D.Quantum Theory of Many Particle System.McGraw-Hill,New York,19717.Particle Data Group,Review of Particle Properties,Phys.Rev.,1992,D45:VIII228.de Jager C W et al.Atomic Data and Nuclear Data Table,1974,14:479—5089.Krusche B et al.Phys.Rev.Lett.,1995,74:373610.Wilhelm M.Ph.D.Thesis,Bomm,BN-IR-93-9411.Homma S et al.J.Phys.Soc.Jap.,1988,57:82812.Robig-Landau M et al.Phys.Lett.,1996,B373:4513.CHIANG H C.Progress in Physics,1982,2:282(in Chinese)(姜焕清.物理学进展,1982,2:228)

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PING Rong-Gang and JIANG Huan-Qing. C(γ,η)X Reactions and Properties of N*(1535) in Nuclei[J]. Chinese Physics C, 2001, 25(6): 521-525.
PING Rong-Gang and JIANG Huan-Qing. C(γ,η)X Reactions and Properties of N*(1535) in Nuclei[J]. Chinese Physics C, 2001, 25(6): 521-525. shu
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Received: 2000-06-28
Revised: 1900-01-01
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C(γ,η)X Reactions and Properties of N*(1535) in Nuclei

    Corresponding author: PING Rong-Gang,
  • Institute of High Energy Physics, The Chinese Academy of Sciences, Beijing 100039, China2 Center of Nuclear Theory, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China3 Institute of Theoretical Physics, The Chinese Academy of Sciences, Beijing 100080, China
  • Received Date: 2000-06-28
  • Accepted Date: 1900-01-01
  • Available Online: 2001-06-05

Abstract: The η photon production reaction on nuclei is studied by employing N*(1535) resonance model. The parameters of the model are extracted by using experimental data of N* decay channels and fitting γp→ηp reaction cross section. The result shows that the theoretical values are in good agreement with experimental data if MN*=1550MeV. The total cross section of the η photoproduction on 12C is calculated. We find that the width of N*(1535) in nuclei increases because of corrections of many-body effects, and the interaction between N* and nuclei has the feature of repulsion.

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