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Neutral pion decay into $ν\barν$ in dense skyrmion matter

Alexander C. Kalloniatis·Jonathan D. Carroll·Byung-Yoon Park
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Abstract

We study the weak decay of the neutral pion to a neutrino-antineutrino pair, $π^0\to ν\barν$, in the Skyrme model. In baryon free-space the process is forbidden by helicity while in a dense baryonic medium, the process becomes possible already to leading order in $G_F$ due to the break-down of Lorentz symmetry in the background medium.

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Alexander C. Kalloniatis, Jonathan D. Carroll, Byung-Yoon Park. 2005-06-01. Neutral pion decay into $ν\barν$ in dense skyrmion matter. https://doi.org/10.1103/physrevd.71.114001

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