The Nucleon anapole moment and parity violating e p scattering
Feb, 2000Citations per year
Abstract:
Parity-violating (PV) interactions among quarks in the nucleon induce a PV coupling, or anapole moment (AM). We compute electroweak gauge-independent contributions to the AM through {\cal O}(1/\lamchis) in chiral perturbation theory. We estimate short-distance PV effects using resonance saturation. The AM contributions to PV electron-proton scattering slightly enhance the axial vector radiative corrections, R_A^p, over the scale implied by the Standard Model when weak quark-quark interactions are neglected. We estimate the theoretical uncertainty associated with the AM contributions to R_A^p to be large, and discuss the implications for the interpretation PV of ep scattering.Note:
- RevTex 29 pages + 8 PS figures, references and discussions added, to appear in Phys. Rev. D
- electron p: elastic scattering
- polarization
- parity: violation
- coupling: (nucleon photon)
- moment: anapole
- electroweak interaction
- perturbation theory: chiral
- effective Lagrangian
- vector dominance
- analyzing power
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