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arXiv · 2312.11741

Neutrino spin oscillation in screening models revisited

Fayçal Hammad·Nicolas Fleury·Parvaneh Sadeghi
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Abstract

We study, using the Mathisson-Papapetrou-Dixon equations, the spin oscillation of neutrinos when the latter are coupled to the scalar field of screening models of dark energy. First, we derive the transition probability formula for a left-handed neutrino to become a right-handed neutrino within a general static and spherically symmetric metric. We then apply our general formula to neutrinos deflected around a central mass described by the Schwarzschild metric. Our results show that, contrary to what one might expect, the scalar field of chameleon-like and symmetron-like screening models would not show any effect on the spin oscillations of neutrinos. The origin of such an outcome is discussed.

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Fayçal Hammad, Nicolas Fleury, Parvaneh Sadeghi. 2023-12-18. Neutrino spin oscillation in screening models revisited. https://doi.org/10.1103/physrevd.108.083025

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