Radiative tail for the process pp - [pi+d] near threshold
Date
1973
Authors
Tanaka, Seiichi
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Abstract
A calculation of the radiative tail for the process proton + proton → pion + deuteron (pp → πd) is presented. A soft-photon technique is applied in which the radiative amplitude is expressed in terms of the elastic amplitude. Numerical calculations are carried out for incident proton energies of 300 - 400 MeV and pion angles of 1°, 20° and 40°. These values are relevant to proposed experiments which will examine the process proton + proton → pion + neutron + proton with very high resolution. This process might be smeared out by the radiative tail of the reaction proton + proton → pion + deuteron ( pp → πd), and therefore it is important to estimate the contribution from the radiative tail to the pion spectrum. It is found that the radiative tail is very small at the experimental parameters of interest, and therefore one need not worry about this contamination when performing the experiments.