Parity-violating two-pion exchange nucleon-nucleon interaction
- Physik Department T39, Technische Universitaet Muenchen, D-85747 Garching (Germany)
We calculate in chiral perturbation theory the parity-violating two-pion exchange nucleon-nucleon potentials at leading one-loop order. At a distance of r=m{sub {pi}}{sup -1}{approx_equal}1.4 fm they amount to about {+-}16% of the parity-violating 1{pi} exchange potential. We evaluate also the parity-violating effects arising from 2{pi} exchange with excitation of virtual {delta}(1232) isobars. These come out to be relatively small in comparison with those from diagrams with only nucleon intermediate states. The reason for this behavior, which is opposite that of the parity-conserving case, is the blocking of the dominant isoscalar central channel by CP invariance. Furthermore, we calculate the T matrix related to the iteration of the parity-violating 1{pi} exchange with the parity-conserving one. The analytical results presented in this work can be easily implemented into calculations of parity-violating nuclear observables.
- OSTI ID:
- 21067849
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 76, Issue 4; Other Information: DOI: 10.1103/PhysRevC.76.047001; (c) 2007 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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