CP-violation in neutrino oscillations and L/E flatness of the e-like event ratio at Super-Kamiokande - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Modern Physics Letters A Year : 2002

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

D.V. Ahluwalia
  • Function : Author
I. Stancu
  • Function : Author

Abstract

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.

Dates and versions

in2p3-00167850 , version 1 (23-08-2007)

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Cite

D.V. Ahluwalia, Yehan Liu, I. Stancu. CP-violation in neutrino oscillations and L/E flatness of the e-like event ratio at Super-Kamiokande. Modern Physics Letters A, 2002, 17, pp.13-21. ⟨10.1142/S0217732302006138⟩. ⟨in2p3-00167850⟩
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