Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2010-05-11
Phys.Rev.C82:024001,2010
Physics
Nuclear Physics
Nuclear Theory
Published version
Scientific paper
10.1103/PhysRevC.82.024001
The impulse approximation (one-body operator) in the n p --> d pi^0 reaction is reexamined with emphasis on the issues of reducibility and recoil corrections. An inconsistency when one pion exchange is included in the production operator is demonstrated and then resolved via the introduction of "wave function corrections" which nearly vanish for static nucleon propagators. Inclusion of the recoil corrections to the nucleon propagators is found to change the magnitude and sign of the impulse production amplitude, worsening agreement with the experimental cross section by approximately 30%. A cutoff is used to account for the phenomenological nature of the external wave functions, and is found to have a significant impact up to approximately 2.5 GeV.
Bolton Daniel R.
Miller Gerald A.
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