Author
Healy Dc
Bio: Healy Dc is an academic researcher. The author has contributed to research in topics: Neutron. The author has an hindex of 1, co-authored 1 publications receiving 52 citations.
Topics: Neutron
Papers
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TL;DR: An experiment resulting in the first measurement of the isospin-mixing, charge-symmetry violating component of the n-italic-p-ITALic interaction has been performed and determined the difference in the angles of the zero crossing of the neutron and proton analyzing powers.
Abstract: An experiment resulting in the first measurement of the isospin-mixing, charge-symmetry violating component of the n-italic-p-italic interaction has been performed. The experiment determined the difference in the angles of the zero crossing of the neutron and proton analyzing powers A-italic/sub n-italic/ and A-italic/sub p-italic/ at 477 MeV. In terms of the laboratory scattering angle of the neutron, the measured difference t-italich-italice-italict-italica-italic/sub 0//sub n-italic/(A/sub n/)= -t-italich-italice-italict-italica-italic/sub 0//sub n-italic/(A/sub p/) = +0.13X(de +- 0.06 X(de( +- 0.03X(de) where the second error is a worst case estimate of systematic error. The resulting difference in the analyzing powers at the zero-crossing angle A-italic/sub n-italic/-A/sub p/ = +0.0037 +- 0.0017( +- 0 .0008).
53 citations
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TL;DR: The purpose of this chapter is to review this “traditional” approach in the area of nuclear forces and their applications to nuclear structure.
Abstract: Nowadays it has become customary in nuclear physics to denote by “tradition” the approach that considers nucleons and mesons as the relevant degrees of freedom. It is the purpose of this chapter to review this “traditional” approach in the area of nuclear forces and their applications to nuclear structure.
1,049 citations
TL;DR: In this article, the authors reviewed the data and theory relevant to understand charge symmetry breaking in hadronic mass spittings, interactions and decay rates; nucleon-nucleon interactions; nuclear reactions; and binding energies of mirror nuclei.
334 citations
TL;DR: In this article, the authors review the progress in observing and understanding charge symmetry breaking, with particular attention to the recent successful observations of CSB in measurements involving the production of a single neutral pion, and related theoretical progress.
Abstract: ▪ Abstract Charge symmetry breaking (CSB) in the strong interaction occurs because of the difference between the masses of the up and down quarks. The use of effective field theories allows us to follow this influence of confined quarks in hadronic and nuclear systems. We review the progress in observing and understanding CSB, with particular attention to the recent successful observations of CSB in measurements involving the production of a single neutral pion, and to the related theoretical progress.
114 citations
TL;DR: The role of ρ mixing as a mechanism for charge-symmetry violation in the nucleon-nucleon system is apparently well established as discussed by the authors, however, a common assumption in generating the charge symmetry violation potential is that the mixing amplitude is constant (at the on-mass-shell value) even when the exchanged meson is far off-shell.
Abstract: The role ofρ-ω mixing as a mechanism for charge-symmetry violation in the nucleon-nucleon system is apparently well established. However, a common assumption in generating the charge-symmetry-violation potential is that theρ-ω mixing amplitude is constant (at the on-mass-shell value) even when the exchanged meson is far off-shell. We construct a simple quark model in which the mixing is generated by theu-d quark mass difference which allows us to test this assumption. It turns out to be surprisingly poor.
69 citations
TL;DR: In this article, it was shown that the amplitude for ϱ 0 -ω mixing must vanish at the transition from time-like to space-like four momentum, and that mixing is either zero everywhere or is necessarily momentum-dependent.
57 citations