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arXiv 1609.09609hep-ph
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TBM混合的微扰及其唯象意义

Perturbation to TBM mixing and its phenomenological implications

M. Sruthilaya, Srinu Gollu

摘要:

为了适应最近观测到的非零反应堆混合角$θ_{13}$,我们考虑轻子混合矩阵的三双峰混合(TBM)形式的领先的订单随着微扰中微子部门。扰动被认为是在23平面中的旋转,随后是在13平面中的旋转,即,$R_{23}(θ_{23}')R_{13}(θ_{13}',ϕ)$。我们得到了能一致地容纳所有观测到的混合角的参数$θ_{23}'$、$θ_{13}'$和$ϕ$的允许值,并计算了狄拉克CP破坏相位($δ_{CP}$)、Jarlskog不变量($J_{CP}$)、有效马约拉纳质量($M_{ee}^ν$)和电子中微子质量($m_{ν_e}$)等唯象观测量.我们发现$δ_{CP}$可以取$0$和$-π/2$之间的任意值,并且$M_{ee}^ν$总是低于它的实验上限。

英文摘要:

To accommodate the recently observed non-zero reactor mixing angle $θ_{13}$, we consider the lepton mixing matrix as Tri-bimaximal mixing (TBM) form in the leading order along with a perturbation in neutrino sector. The perturbation is taken to be a rotation in 23 plane followed by a rotation in 13 plane, i.e., $R_{23}(θ_{23}')R_{13}(θ_{13}',ϕ)$. We obtain the allowed values of the parameters $θ_{23}'$, $θ_{13}'$ and $ϕ$, which can accommodate all the observed mixing angles consistently and calculate the phenomenological observables such as the Dirac CP violating phase ($δ_{CP}$), Jarlskog invariant ($J_{CP}$), effective majorana mass $M_{ee}^ν$, and $m_{ν_e}$, the electron neutrino mass. We find that $δ_{CP}$ can take any values between $0$ and $-π/2$ and $M_{ee}^ν$ always comes below its experimental upper limit.

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