Recent neutrino data and a realistic tribimaximal-like neutrino mixing matrix

被引：12

作者：

Ahn, Y. H. ^{[1
]}

Cheng, Hai-Yang ^{[2
]}

Oh, Sechul ^{[3
]}

机构：

[1] KIAS, Sch Phys, Seoul 130722, South Korea

[2] Acad Sinica, Inst Phys, Taipei 115, Taiwan

[3] Yonsei Univ, Univ Coll, Inchon 406840, South Korea

来源：

PHYSICS LETTERS B | 2012年 / 715卷 / 1-3期

关键词：

CP-VIOLATION; SYMMETRY; OSCILLATIONS;

D O I：

10.1016/j.physletb.2012.07.061

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In light of the recent neutrino experimental results from the Daya Bay and RENO Collaborations, we construct a realistic tribimaximal-like Pontecorvo-Maki-Nakagawa-Sakata (PMNS) leptonic mixing matrix. Motivated by the Qin-Ma (QM) parametrization for the quark mixing matrix in which the CP-odd phase is approximately maximal, we propose a simple ansatz for the charged lepton mixing matrix, namely, it has the QM-like parametrization, and assume the tribimaximal mixing (TBM) pattern for the neutrino mixing matrix. The deviation of the leptonic mixing matrix from the TBM one is then systematically studied. While the deviation of the solar and atmospheric neutrino mixing angles from the corresponding TBM values, i.e. sin(2) theta(12) = 1/3 and sin(2) theta(23) = 1/2, is fairly small, we find a non-vanishing reactor mixing angle given by sin theta(13) approximate to lambda/root 2 (lambda approximate to 0.22 being the Cabibbo angle). Specifically, we obtain theta(13) similar or equal to 9.2 degrees and delta(CP) similar or equal to delta(QM) similar or equal to O(90 degrees). Furthermore, we show that the leptonic CP violation characterized by the Jarlskog invariant is vertical bar J(CP)(l)vertical bar similar or equal to lambda/6, which could be tested in the future experiments such as the upcoming long baseline neutrino oscillation ones. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：203 / 207

页数：5

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