The $\Delta$ Interaction Contribution to Double Charge Exchange

Oset, E.; Vicente-Vacas, M.J.; Johnson, M.B.; Strottman, D.; Fortune, H.T.; Gilman, Ronald A.

doi:10.1016/0375-9474(88)90082-6

The $\Delta$ Interaction Contribution to Double Charge Exchange

1988

25 pages

Published in:

Nucl.Phys.A 483 (1988) 514-538

Published: 1988

DOI:

10.1016/0375-9474(88)90082-6

View in:

Nuclear Science References

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Abstract: (Elsevier)

The Δ interaction mechanism and its contribution to the pion-induced double-charge exchange reaction to isobaric analogue states at energies around the resonance region is studied and is compared to the conventional mechanism which involves two sequential single-charge exchange steps. The Δ interaction mechanism is found to be very sensitive to the choice of form factors; it gives rise by itself to cross sections ranging from 5% of the results from the conventional mechanism to values comparable to the conventional mechanism. The amplitudes from the two processes are out of phase by approximately 90° near T π = 180 MeV and hence, there is little interference. In particular the minimum of the differential cross section at T π = 164 MeV is not changed by the inclusion of the Δ interaction mechanism.

PI+ NUCLEUS: NUCLEAR REACTION
CHARGE EXCHANGE: MULTIPLE
MULTIPLE: CHARGE EXCHANGE
DELTA(1232)
FORM FACTOR
MESON: EXCHANGE
EXCHANGE: MESON
APPROXIMATION: GLAUBER
DIFFERENTIAL CROSS SECTION: ENERGY DEPENDENCE
ENERGY DEPENDENCE: DIFFERENTIAL CROSS SECTION

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