HAL : in2p3-00167850, version 1

DOI : 10.1142/S0217732302006138

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Modern Physics Letters A 17 (2002) 13-21

CP-violation in neutrino oscillations and L/E flatness of the e-like event ratio at Super-Kamiokande

D.V. Ahluwalia, Y. Liu1, I. Stancu

(2002)

We show that if the presently observed L/E-flatness of the electron-like event ratio in the Super-Kamiokande atmospheric neutrino data is confirmed, then the indicated ratio must be unity. Further, it is found that once CP is violated the exact L/E flatness implies: (a) the CP-violating phase, in the standard parametrization, is narrowed down to two possibilities +/-pi/2, and (b) the mixing between the second and the third generations must be maximal. With these results at hand, we argue that a dedicated study of the L/E-flatness of the electron-like event ratio by Super-Kamiokande can serve as an initial investigatory probe of CP violation in the neutrino sector. The assumptions under which these results hold are explicitly stated.

1 :	LPSC - Laboratoire de Physique Subatomique et de Cosmologie

Thème(s)

:

Physique/Astrophysique/Cosmologie et astrophysique extra-galactique

Mot(s)-clé(s) : Neutrino oscillations – CP-violation – atmospheric neutrinos – bi-maximal mixing

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Contributeur : Emmanuelle Vernay <>

Soumis le : Jeudi 23 Août 2007, 14:32:36

Dernière modification le : Jeudi 23 Août 2007, 16:26:53