Measuring the deviation of the 2-3 lepton mixing from maximal with atmospheric neutrinos

Simple item page
dc.creatorGonzalez-Garcia, M. C.
dc.creatorMaltoni, M.
dc.creatorSmirnov, A. Yu.
dc.date2004-08-16
dc.date2004-09-02
dc.date.accessioned2026-07-07T11:31:39Z
dc.date.available2026-07-07T11:31:39Z
dc.descriptionThe measurement of the deviation of the 2-3 leptonic mixing from maximal, D_23 = 1/2 - sin^2(theta_23), is one of the key issues for understanding the origin of the neutrino masses and mixing. In the three-neutrino context we study the dependence of various observables in the atmospheric neutrinos on D_23. We perform a global three-neutrino analysis of the atmospheric and reactor neutrino data taking into account the effects of both the oscillations driven by the "solar" parameters (Delta_m_21^2 and theta_12) and the 1-3 mixing. The departure from the one-dominant mass scale approximation results into the shift of the 2-3 mixing from maximal by Delta_sin^2(theta_23) ~ 0.04, so that D_23 ~ 0.04 +- 0.07 (1 sigma). Though value of the shift is not statistically significant, the tendency is robust. The shift is induced by the excess of the e-like events in the sub-GeV sample. We show that future large scale water Cherenkov detectors can determine D_23 with accuracy of a few percent, comparable with the sensitivity of future long baseline experiments. Moreover, the atmospheric neutrinos will provide unique information on the sign of the deviation (octant of theta_23).
dc.description20 pages, LaTeX2e file using RevTEX4, 6 figures and 1 table included
dc.identifierhttps://arxiv.org/abs/hep-ph/0408170
dc.identifierhttp://arxiv.org/abs/hep-ph/0408170
dc.identifierPhys.Rev.D70:093005,2004
dc.identifierdoi:10.1103/PhysRevD.70.093005
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197337
dc.subjectHigh Energy Physics - Phenomenology
dc.titleMeasuring the deviation of the 2-3 lepton mixing from maximal with atmospheric neutrinos
dc.typetext

Files

Collections

arXiv