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arXiv 0810.4394hep-ph
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普朗克尺度效应引起的电偶极矩和中微子混合

Electric Dipole Moment and Neutrino Mixing due to Planck Scale Effects

Bipin Singh Koranga

摘要:

本文考虑普朗克标度算符对电子电偶极矩的影响。在中微子质量为零的标准模型中,电子的电偶极矩de在三圈以内为零。我们假设中微子的质量和混合产生通过物理在普朗克尺度和电弱制动尺度之间的中间尺度。我们还假设,以上的电弱破缺标度中微子质量几乎简并和混合是双极大的。量子引力(Planck尺度)效应导致了一个有效的SU(2)_{L} \times U(1)不变的5维拉格朗日对称性,涉及标准模型.在电弱对称性破缺时,该算符引起中微子质量和混合的修正,这些附加项可以看作是对双极大中微子质量矩阵的微扰。我们假设引力相互作用是味盲的,研究了由于普朗克尺度效应引起的中微子混合和电偶极矩。

英文摘要:

In this paper, we consider the effect of Planck scale operators on electric dipole moment of the electron de. The electric dipole moment of the electron, de is known to vanish up to three loops in the standard model with massless neutrinos We consider the Planck scale operator on neutrino mixing. We assume that the neutrino masses and mixing arise through physics at a scale intermediate between Planck scale and the electroweak braking scale. We also assume, that just above the electroweak breaking scale neutrino mass are nearly degenerate and the mixing is bi-maximal. Quantum gravity (Planck scale) effects lead to an effective SU(2)_{L}\times U(1) invariant dimension-5 Lagrangian symmetry involving Standard Model. On electroweak symmetry breaking, this operator gives rise to correction to the neutrino masses and mixings these additional terms can be considered as perturbation to the bimaximal neutrino mass matrix We assume that the gravitational interaction is flavour blind and we study the neutrino mixing and electric dipole moment due to the Planck scale effects.

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