Author/Authors :
David B. Kaplan، نويسنده , , Martin J. Savage، نويسنده , , Roxanne P. Springer، نويسنده , , Mark B. Wise، نويسنده ,
Abstract :
Weak interactions are expected to induce a parity violating pion–nucleon coupling, hπNN(1). This coupling should be measurable in a proposed experiment to study the parity violating asymmetry Aγ in the process n→+p→d+γ. We compute the leading dependence of Aγ on the coupling hπNN(1) using recently developed effective field theory techniques and find an asymmetry of Aγ=+0.17 hπNN(1) at leading order. This asymmetry has the opposite sign to that given by Desplanques and Missimer.
