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

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 $pn\to d{\pi }^0$, for reasonable values of the mass difference between down and up quarks, $\delta m_N$. Using a value $\delta m_N\approx$ 3 MeV leads to a prediction of a 10 standard deviation effect for a TRIUMF experiment.

9 pages, 1 figure, to be submitted to Phys.Lett. B

References in corpus (2)

• Effective Field Theory of Nuclear Forces
• On the size of isospin violation in low-energy pion-nucleon scattering

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• Electric Dipole Moments of Light Nuclei From Chiral Effective Field Theory
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• Extraction of the strong neutron-proton mass difference from the charge symmetry breaking in pn-->d pi0
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• Charge-Symmetry-Breaking Three-Nucleon Forces
• Realistic Few-Body Physics in the $dd\to \alpha {\pi }^0$ Reaction
• Towards a high precision calculation for the pion-nucleus scattering lengths
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• Effective Field Theory calculations of $NN\to NN\pi$
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