Isospin Dependences in Parity Violating Electron Scattering

Donnelly, T.W.; Dubach, J.; Sick, Ingo

doi:10.1016/0375-9474(89)90432-6

Isospin Dependences in Parity Violating Electron Scattering

T.W. Donnelly
(
- MIT, LNS
)
,
J. Dubach
(
- Massachusetts U., Amherst and
- Jefferson Lab
)
,
Ingo Sick
(
- Basel U.
)

Mar, 1989

43 pages

Published in:

Nucl.Phys.A 503 (1989) 589-631

Published: 1989

DOI:

10.1016/0375-9474(89)90432-6

Report number:

MIT-CTP-1645

View in:

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Abstract: (Elsevier)

The role of the isospin structure of nuclear states in parity-violating single-arm electron scattering from nuclei is examined. Specific examples of elastic scattering from even-even N = Z (0 + , M T = 0, nominally T = 0) nuclei, which are supposed to be ideally suited for studying the electroweak interaction, are considered in detail. The aim is to find when nuclear structure effects due to isospin impurities significantly enter into the parity-violating asymmetry, and hence to determine the level of precision at which one can hope to extract the underlying weak neutral current couplings in a relatively model-independent way. The formalism is then extended to the general case of J > 0 states and even-even N ≠ Z nuclei. Finally, it is shown that measurement of the parity-violating asymmetry may provide a determination of the neutron distribution in nuclei.

electron light nucleus: elastic scattering
carbon
electron nucleus: elastic scattering
silicon
calcium
asymmetry
parity: violation
dependence: isospin
neutral current: coupling
nucleus: transition

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