New Ambiguity in Probing CP Violation in Neutrino Oscillations
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Miranda, O.G.; Tórtola Baixauli, María Amparo; Furtado Valle, José Wagner
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Aquest document és un/a article, creat/da en: 2016
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If neutrinos get mass via the seesaw mechanism the mixing matrix describing neutrino oscillations can be effectively nonunitary. We show that in this case the neutrino appearance probabilities involve a new CP phase ϕ associated with nonunitarity. This leads to an ambiguity in extracting the "standard" three-neutrino phase δCP, which can survive even after neutrino and antineutrino channels are combined. Its existence should be taken into account in the planning of any oscillation experiment aiming at a robust measurement of δCP. |
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