Role of the N*(1535) in {eta}{sup '} production
- Institute of Modern Physics, Chinese Academy of Sciences, Post Office Box 31, Lanzhou 730000 (China)
We study the near-threshold {eta}{sup '} production mechanism in nucleon-nucleon and {pi}N collisions under the assumption that subthreshold resonance N*(1535) is predominant. In an effective Lagrangian approach that gives a reasonable description to the pN{yields}pN{eta} and {pi}{sup -}p{yields}n{eta} reactions, we find that the excitation of N*(1535) resonance from the t-channel {pi} exchange makes the dominate contribution to the pN{yields}pN{eta}{sup '} process, and a value of 6.5 for the ratio of {sigma}(pn{yields}pn{eta}{sup '}) to {sigma}(pp{yields}pp{eta}{sup '}) is predicted. A strongcoupling strength of N*(1535) to {eta}{sup '}N (g{sub {eta}{sup '}}{sub NN*}{sup 2}/4{pi}=1.1) is extracted from a combined analysis to pp{yields}pp{eta}{sup '} and {pi}N{yields}N{eta}{sup '}, and the possible implication to the intrinsic component of N*(1535) is explored.
- OSTI ID:
- 21192241
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 78, Issue 3; Other Information: DOI: 10.1103/PhysRevC.78.035207; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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