Parity-violating interaction effects in thenpsystem
نویسندگان
چکیده
منابع مشابه
Parity-Violating Interaction Effects in the np System
We investigate parity-violating observables in the np system, including the longitudinal asymmetry and neutron-spin rotation in ~np elastic scattering, the photon asymmetry in ~np radiative capture, and the asymmetries in deuteron photo-disintegration d(~γ, n)p in the threshold region and electrodisintegration d(~e, e)np in quasi-elastic kinematics. To have an estimate of the model dependence f...
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The proton-proton parity-violating longitudinal asymmetry is calculated in the lab-energy range 0–350 MeV, using a number of different, latest-generation strong-interaction potentials–Argonne v18, Bonn-2000, and Nijmegen-I–in combination with a weak-interaction potential consisting of ρand ω-meson exchanges–the model known as DDH. The complete scattering problem in the presence of parity-conser...
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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−1 π ≃ 1.4 fm they amount to about ±16% of the parity-violating 1π-exchange potential. We evaluate also the parity-violating effects arising from 2π-exchange with excitation of virtual ∆(1232)-isobars. These come out to be relatively small...
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Two-pion exchange parity-violating nucleon-nucleon interactions from recent effective field theories and earlier fully covariant approaches are investigated. The potentials are compared with the idea to obtain better insight on the role of low-energy constants appearing in the effective field theory approach and the convergence of this one in terms of a perturbative series. The results are illu...
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Measurements of parity-violating asymmetries in the scattering of longitudinally polarized electrons off unpolarized fixed targets are used to access leptonic and semi-leptonic weak neutral current amplitudes. One thrust of the current program is the measurement the elastic neutral weak amplitude at very low Q from scattering off a heavy spinless nucleus, which is sensitive to the presence of a...
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ژورنال
عنوان ژورنال: Physical Review C
سال: 2004
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.70.044007