High scale mixing unification for Dirac neutrinos

被引：13
作者：
Abbas, Gauhar [1 ]
Gupta, Saurabh [1 ]
Rajasekaran, G. [1 ,2 ]
Srivastava, Rahul [1 ]
机构：
[1] Inst Math Sci, Madras 600113, Tamil Nadu, India
[2] Chennai Math Inst, Siruseri 603103, Tamil Nadu, India
来源：
PHYSICAL REVIEW D | 2015年 / 91卷 / 11期
关键词：
MASSES;
D O I：
10.1103/PhysRevD.91.111301
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Starting with the high scale mixing unification hypothesis, we investigate the renormalization-group evolution of mixing parameters and masses for Dirac-type neutrinos. Following this hypothesis, the Pontecorvo-Maki-Nakagawa-Sakata (PMNS) mixing angles and phase are taken to be identical to the Cabibbo-Kobayashi-Maskawa (CKM) ones at a unifying high scale. Then they are evolved to a low scale using renormalization-group equations. The notable feature of this hypothesis is that renormalization-group evolution with quasidegenerate mass pattern can explain largeness of leptonic mixing angles even for Dirac neutrinos. The renormalization-group evolution "naturally" results in a nonzero and small value of leptonic mixing angle theta(13). One of the important predictions of this work is that the mixing angle theta(23) is nonmaximal and lies only in the second octant. We also derive constraints on the allowed parameter range for the supersymmetry breaking and unification scales for which this hypothesis works. The results are novel and can be tested by present and future experiments.
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页数：6
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