Parity mixing of elastic scattering resonances: General theory and application to N14

E. G. Adelberger, P. Hoodbhoy, and B. A. Brown
Phys. Rev. C 30, 456 – Published 1 August 1984
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Abstract

We consider the elastic scattering of nucleons from spin ½ targets via parity-mixed resonances and derive expressions for the longitudinal parity nonconserving analyzing power. We neglect any direct parity nonconserving processes—the parity nonconservation being assumed to be due solely to the resonances. We then consider a particularly interesting example—the scattering of protons by C13 over 0+ and 0 I=1 resonances. We show that in this case longitudinal analyzing power measurements yield, with little theoretical uncertainty, the parity nonconserving matrix element between the 0+ and 0 levels. The large width of the 0(2s12) resonance compared to that of the 0+(1p12) resonance produces a significant enhancement of the predicted effect. Because of the large size of elastic scattering cross sections a longitudinal analyzing power experiment can achieve small statistical errors. The N14 resonances are especially interesting because the mixing is essentially pure ΔI=0.

  • Received 16 December 1983

DOI:https://doi.org/10.1103/PhysRevC.30.456

©1984 American Physical Society

Authors & Affiliations

E. G. Adelberger and P. Hoodbhoy*

  • Physics Department, University of Washington, Seattle, Washington 98195

B. A. Brown

  • Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824

  • *Present address: Department of Physics, Quaid-e-Azam University, Islamabad, Pakistan.

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Vol. 30, Iss. 2 — August 1984

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