Matter effects in neutrino visible decay at future long-baseline experiments

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Ascencio-Sosa M.V.
Calatayud-Cadenillas A.M.
Gago A.M.
Jones-Pérez J.
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Springer New York LLC
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Neutrino visible decay in the presence of matter is re-evaluated. We study these effects in two future long-baseline experiments where matter effects are relevant: DUNE (1300 km) and a hypothetical beam aimed towards ANDES (7650 km). We find that matter effects are negligible for the visible component of neutrino decay at DUNE, being much more relevant at ANDES. We perform a detailed simulation of DUNE, considering Vu disappearance and Ve appearance channels, for both FHC and RHC modes. The sensitivity to the decay constant alpha 3 can be as low as 2 x 10-6 eV2 a 90% C.L., depending on the neutrino masses and type of coupling. We also show the impact of neutrino decay in the determination of theta23 and deltaCP, and find that the bestfit value of theta 23 can move from a true value at the lower octant towards the higher constant
A.M.G. and J.J.P. acknowledge funding by the Dirección de Gestión de la Investigación at PUCP, through grant DGI-2015-3-0026. M.V.A.S. acknowledges funding by CienciActiva-CONCYTEC Grants 026-2015 and CONV-236-2015-FONDECYT. A.M.C.C. received funding from CienciActiva-CONCYTEC Grant 233-2015-1. We would like to thank F. Díaz-Desposorio for his help with the GLoBES implementation, and O. A. Díaz in the Dirección de Tecnologías de Información for support within the LEGION system.
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neutrino decay, Neutrino, FHC and RHC modes