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Charge Symmetry Violation in $pn\to d π^0$ as a Test of Chiral Effective Field Theory

U. van Kolck·J. A. Niskanen·G. A. Miller
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Abstract

Chiral effective field theory predicts a specific charge symmetry violating amplitude for pion production. This term is shown to provide the dominant contribution to the forward-backward asymmetry in the angular distribution for the reaction $pn\to dπ^0$, for reasonable values of the mass difference between down and up quarks, $δm_N$. Using a value $δm_N\approx$ 3 MeV leads to a prediction of a 10 standard deviation effect for a TRIUMF experiment.

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U. van Kolck, J. A. Niskanen, G. A. Miller. 2000-06-20. Charge Symmetry Violation in $pn\to d π^0$ as a Test of Chiral Effective Field Theory. https://doi.org/10.1016/s0370-2693(00)01133-3

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