HighEnergy Deuteron Cross Sections: ChargeExchange Effects
Abstract
The effects of charge exchange in collisions of highenergy particles of isotopic spin 1/2 with deuterons are investigated. The diffraction approximation is used to express the deuteron chargeexchange cross section in terms of the elasticscattering amplitudes of the neutron and proton and the deuteron groundstate wave function. Examinations are also made of the influence of the chargeexchange mechanism on the total cross section of the deuteron, the elastic differential cross section, and the summed angular distribution of scattering (elastic plus inelastic scattering with initial charges preserved). The important role played by doublescattering processes in shaping the differential cross sections of the deuteron is illustrated in a discussion of protondeuteron elastic scattering at 2 BeV. Double scattering is shown to be the dominant collision mechanism at scattering angles which are not too close to the forward direction. The effect of the double chargeexchange process on the elastic differential cross section is shown to be small but of some significance in the angular range which is dominated by double scattering. The theory developed for chargeexchange reactions is applied to the K^{0} angular distribution which has been observed from K^{+}deuteron collisions at 2.27 BeVc. Estimates are found for the differential and integrated K^{+}neutron chargeexchange cross sections, and for some related parameters. The effects of double collisions on these cross sections are relatively small and easily evaluated. The effect of the chargeexchange mechanism on the values of the pn, p̄n, and K^{+/}n total cross sections which are reached indirectly via measurements on the deuteron is shown to be exceedingly small for momenta above ~2 BeVc.
 Publication:

Physical Review
 Pub Date:
 April 1967
 DOI:
 10.1103/PhysRev.156.1685
 Bibcode:
 1967PhRv..156.1685G