Two-body Mechanisms in Pion Photoproduction on the Trinucleon
S. S. Kamalov, L. Tiator, C. Bennhold
Abstract
A breakdown of the Impulse Approximation is studied in pion photoproduction on 3He at high momentum transfers. The usual DWIA formalism with Faddeev wave functions which works well for small momentum transfers deviates from experimental measurements by up to two orders of magnitude for Q2>6 fm-2. It is found that the explicit inclusion of two-body mechanisms, where the photon is absorbed on one nucleon and the pion is emitted from another nucleon can restore agreement with the data.
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