Visible neutrino decay in the light of appearance and disappearance long baseline experiments
| Autor: | Ricardo A. Gomes, Orlando L. G. Peres, Joel Jones-Perez, A. M. Gago, A. L. G. Gomes |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics 010308 nuclear & particles physics Physics::Instrumentation and Detectors Physics beyond the Standard Model Scalar (mathematics) High Energy Physics::Phenomenology FOS: Physical sciences Type (model theory) 01 natural sciences Pseudoscalar High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) MINOS Beyond Standard Model 0103 physical sciences lcsh:QC770-798 Neutrino Physics lcsh:Nuclear and particle physics. Atomic energy. Radioactivity High Energy Physics::Experiment Neutrino 010306 general physics Neutrino oscillation Energy (signal processing) |
| Zdroj: | Journal of High Energy Physics Journal of High Energy Physics, Vol 2017, Iss 11, Pp 1-29 (2017) |
| DOI: | 10.48550/arxiv.1705.03074 |
| Popis: | We investigate the present constraints from MINOS and T2K experiments for the neutrino decay scenario induced by non-diagonal couplings of Majorons to neutrinos. As novelty, on top of the typical invisible decay prescription, we add the contribution of visible decay, where final products can be observed. This new effect depends on the nature of the neutrino - Majoron coupling, which can be of scalar or pseudoscalar type. Using the combination of disappearance data from MINOS and disappearance and appearance data from T2K, for normal ordering, we constrain the decay parameter $\alpha\equiv E\,\Gamma$ for the heaviest neutrino, where $E$ and $\Gamma$ are the neutrino energy and width, respectively. We find that when considering visible decay within appearance data, one can improve current neutrino long-baseline constraints up to $\alpha< \mathcal{O}(10^{-5})$ eV$^2$, at 90\% C.L., for both kinds of couplings, which is better by one order of magnitude compared to previous bounds. Comment: 29 pages, 8 figures, 3 appendices; v2: Corrected errors, version accepted for publication in JHEP |
| Databáze: | OpenAIRE |
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