MESON EXCHANGE CURRENTS IN PION NUCLEUS DOUBLE CHARGE EXCHANGE REACTIONS

Oset, E.; Strottman, D.; Vicente-Vacas, M.J.; Ma, Wei-Hsing

doi:10.1016/0375-9474(83)90240-3

MESON EXCHANGE CURRENTS IN PION NUCLEUS DOUBLE CHARGE EXCHANGE REACTIONS

E. Oset
(
- Valladolid U.
)
,
D. Strottman
(
- Valladolid U.
)
,
M.J. Vicente-Vacas
(
- Valladolid U.
)
,
Wei-Hsing Ma
(
- Valladolid U.
)

1983

17 pages

Published in:

Nucl.Phys.A 408 (1983) 461-477

Published: 1983

DOI:

10.1016/0375-9474(83)90240-3

View in:

Nuclear Science References

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Abstract: (Elsevier)

The scattering of pions by virtual mesons in the nuclear medium is analysed and its contribution to the process of double-charge exchange in pion-nucleus scattering compared to the conventional mechanism which involves charge exchange in the scattering of the pions with two different nucleons. It is shown that at forward angles the cross section is decreased by about 50% around pion energies T ≈ 130 MeV and increased by a similar amount at energies above the resonance, T ≈ 250 MeV. At large angles the meson-exchange contribution changes the cross section appreciably and can become the dominant mechanism.

PI LIGHT NUCLEUS: CHARGE EXCHANGE
CHARGE EXCHANGE: PI LIGHT NUCLEUS
PI LIGHT NUCLEUS: NUCLEAR REACTION
CHARGE EXCHANGE: MULTIPLE
MULTIPLE: CHARGE EXCHANGE
OXYGEN: NUCLIDE
MESON: EXCHANGE
EXCHANGE: MESON
AMPLITUDE ANALYSIS
SCATTERING: SMALL-ANGLE

References(47)

Figures(0)

[1]

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,
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)

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