Consistency of parity-violating pion-nucleon couplings extracted from measurements in 18F and 133Cs

Abstract

The recent measurement of the nuclear anapole moment of 133Cs has been interpreted to yield a value of the weak pion-nucleon coupling H_pi^1 which contradicts the upper limit from the 18F experiments. We argue that because of the sensitivity of the anapole moment to H_rho^0 in the odd proton nucleus 133Cs, there is a combination of weak meson-nucleon couplings which satisfies both experiments and which is (barely) in agreement with theory. In addition, the anapole moment measurement in 205Tl gives a constraint which is inconsistent with the value from 133Cs, calling into question the theory of nuclear anapole moments. We argue that measurements of directional asymmetry in n+p-->d+gamma and in the photo-disintegration of the deuteron by circularly polarized photons, combined with results from pp scattering, would determine H_pi^1 and several other weak meson-nucleon couplings in a model-independent way.

9 pages, RevTeX, 1 figure, eps, submitted to Phys. Rev. C

References in corpus (1)

• The anapole moment and nucleon weak interactions

Cited by in corpus (21)

• Nuclear Anapole Moments
• Hadronic Parity Violation: a New View through the Looking Glass
• The parity-violating pion-nucleon coupling constant from a realistic three flavor Skyrme model
• Anapole Moment and Other Constraints on the Strangeness Conserving Hadronic Weak Interaction
• Statistical Theory of Parity Nonconservation in Compound Nuclei
• About the parity-non-conserving asymmetry in n+p--->d+gamma
• Measuring the P-odd Pion-Nucleon Coupling h_{πNN}^{(1)} in π^+ Photoproton Production Near the Threshold
• Many-body corrections to the nuclear anapole moment II
• Parity-Violating Pion-Nucleon Coupling h_{πNN}^{(1)} from π^+ Electroproton Production Near the Threshold
• A measurement of parity-violating gamma-ray asymmetries in polarized cold neutron capture on 35Cl, 113Cd, and 139La
• Parity Violation in Polarized-Gamma Proton Compton Scattering
• Enhanced spin-dependent parity non-conservation effect in the $7s{}^2{S}_{1/2}\to 6d{}^2{D}_{5/2}$ transition in Fr: A possibility for unambiguous detection of nuclear anapole moment
• Subleading corrections to parity violating pion photoproduction
• Relativistic coupled-cluster analysis of parity nonconserving amplitudes and related properties of the $6s{}^2{S}_{1/2}-5d{}^2{D}_{3/2;5/2}$ transitions in ${}^{133}$Cs
• Progress toward a new measurement of the parity violating asymmetry in n+p-->d+gamma
• Enhancement of parity violating mixing in halo nuclei and the problem of neutron weak parity nonconserving potential constant
• An optical lattice based method for precise measurements of atomic parity violation
• $\Delta S=0$ Effective Weak Chiral Lagrangian from the Instanton Vacuum
• Superconvergence Relations and Parity Violating analogue of GDH sum rule
• High-accuracy Nuclear Spin Dependent Parity Violating Amplitudes in ${}^{133}$Cs
• Anomalous anapole moment of an exotic nucleus