Reconciling results of LSND, MiniBooNE and other experiments with soft decoherence - High Energy Physics - PhenomenologyReportar como inadecuado




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Abstract: We propose an explanation of the LSND signal via quantum-decoherence of themass states, which leads to damping of the interference terms in theoscillation probabilities. The decoherence parameters as well as their energydependence are chosen in such a way that the damping affects only oscillationswith the large atmospheric $\Delta m^2$ and rapidly decreases with theneutrino energy. This allows us to reconcile the positive LSND signal withMiniBooNE and other null-result experiments. The standard explanations ofsolar, atmospheric, KamLAND and MINOS data are not affected. No new particles,and in particular, no sterile neutrinos are needed. The LSND signal iscontrolled by the 1-3 mixing angle $\theta {13}$ and, depending on the degreeof damping, yields $0.0014 < \sin^2\theta {13} < 0.034$ at $3\sigma$. Thescenario can be tested at upcoming $\theta {13}$ searches: while the comparisonof near and far detector measurements at reactors should lead to a null-resulta positive signal for $\theta {13}$ is expected in long-baseline acceleratorexperiments. The proposed decoherence may partially explain the results ofGallium detector calibrations and it can strongly affect supernova neutrinosignals.



Autor: Yasaman Farzan, Thomas Schwetz, Alexei Yu Smirnov

Fuente: https://arxiv.org/







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