T2K indication of relatively large θ13 and a natural perturbation to the democratic neutrino mixing pattern

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XING Zhi-Zhong. T2K indication of relatively large θ13 and a natural perturbation to the democratic neutrino mixing pattern[J]. Chinese Physics C, 2012, 36(2): 101-105. doi: 10.1088/1674-1137/36/2/001
XING Zhi-Zhong. T2K indication of relatively large θ13 and a natural perturbation to the democratic neutrino mixing pattern[J]. Chinese Physics C, 2012, 36(2): 101-105.  doi: 10.1088/1674-1137/36/2/001 shu
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Received: 2011-08-31
Revised: 2011-05-06
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T2K indication of relatively large θ13 and a natural perturbation to the democratic neutrino mixing pattern

    Corresponding author: XING Zhi-Zhong,
  • Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Abstract: The T2K Collaboration has recently reported a remarkable indication of the ν→ν oscillation which is consistent with a relatively large value of θ13 in the three-flavor neutrino mixing scheme. We show that it is possible to account for such a result of θ13 by introducing a natural perturbation to the democratic neutrino mixing pattern, without or with CP violation. A testable correlation between θ13 and θ23 is predicted in this ansatz. We also discuss the Wolfenstein-like parametrization of neutrino mixing, and comment on other possibilities of generating sufficiently large θ13 at the electroweak scale.

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