Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1998-07-30
Phys.Lett. B449 (1999) 1-5
Physics
Nuclear Physics
Nuclear Theory
7 pages, 2 figures from 3 eps files, latex
Scientific paper
10.1016/S0370-2693(99)00032-5
Weak interactions are expected to induce a parity violating pion-nucleon coupling, h_{\pi NN}^{(1)}. This coupling should be measurable in a proposed experiment to study the parity violating asymmetry A_\gamma in the process \vec n + p \to d+\gamma. We compute the leading dependence of A_\gamma on the coupling h_{\pi NN}^{(1)} using recently developed effective field theory techniques and find an asymmetry of A_\gamma = +0.17 h_{\pi NN}^{(1)} at leading order. This asymmetry has the opposite sign to that given by Desplanques, Donoghue and Holstein.
Kaplan David B.
Savage Martin J.
Springer Roxanne P.
Wise Mark B.
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