The {pi}N{yields}{pi}{pi}N reaction around the N*(1440) energy
- Department of Physics, Osaka City University, Osaka 558-8585 (Japan)
We study the {pi}N{yields}{pi}{pi}N reaction around the N*(1440) mass-shell energy. Considering the total cross sections and invariant mass distributions, we discuss the role of N*(1440) and its decay processes on this reaction. The calculation is performed by extending our previous approach [Phys. Rev. C 69, 025206 (2004)], in which only the nucleon and {delta}(1232) were considered as intermediate baryon states. The characteristics in the recent data of the {pi}{sup -}p{yields}{pi}{sup 0}{pi}{sup 0}n reaction measured by Crystal Ball Collaboration can be understood as a strong interference between the two decay processes: N*(1440){yields}{pi}{delta} and N*(1440){yields}N({pi}{pi}){sub Swave}{sup I=0}. It is also found that the scalar-isoscalar {pi}{pi} rescattering effect in the NN*({pi}{pi}){sub Swave}{sup I=0} vertex, which corresponds to the propagation of {sigma} meson, seems to be necessary for explaining the several observables of the {pi}N{yields}{pi}{pi}N reaction: the large asymmetric shape in the {pi}{sup 0}{pi}{sup 0} invariant mass distributions of the {pi}{sup -}p{yields}{pi}{sup 0}{pi}{sup 0}n reaction and the {pi}{sup +}p{yields}{pi}{sup +}{pi}{sup +}n total cross section.
- OSTI ID:
- 20771555
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 73, Issue 5; Other Information: DOI: 10.1103/PhysRevC.73.055203; (c) 2006 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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