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Title: Deviations from tribimaximal neutrino mixing in the type-II seesaw model and leptogenesis

Abstract

Current experimental data allow the zero value for one neutrino mass, either m{sub 1}=0 or m{sub 3}=0. This observation implies that a realistic neutrino mass texture can be established by starting from the limit (a) m{sub 1}=m{sub 2}=0 and m{sub 3}{ne}0 or (b) m{sub 1}=m{sub 2}{ne}0 and m{sub 3}=0. In both cases, we may introduce a particular perturbation which ensures the resultant neutrino mixing matrix to be the tribimaximal mixing pattern or its viable variations with all entries being formed from small integers and their square roots. We find that it is natural to incorporate this kind of neutrino mass matrix in the minimal type-II seesaw model with only one heavy right-handed Majorana neutrino N in addition to the SU(2){sub L} Higgs triplet {delta}{sub L}. We show that it is possible to account for the cosmological baryon number asymmetry in the m{sub 3}=0 case via thermal leptogenesis, in which the one-loop vertex correction to N decays is mediated by {delta}{sub L} and the CP-violating asymmetry of N decays is attributed to the electron flavor.

Authors:
 [1];  [2]; ;  [3]
  1. Department of Physics, National University of Singapore, Singapore 117542 (Singapore)
  2. Sektion Physik, Ludwig-Maximilians-Universitaet Muenchen, 80333 Munich (Germany)
  3. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 (China)
Publication Date:
OSTI Identifier:
21032322
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 76; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.76.073009; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; BARYON NUMBER; CORRECTIONS; CP INVARIANCE; ELECTRONS; FLAVOR MODEL; HIGGS BOSONS; HIGGS MODEL; KOBAYASHI-MASKAWA MATRIX; NEUTRINOS; PARTICLE DECAY; PERTURBATION THEORY; REST MASS; STANDARD MODEL; SU-2 GROUPS; TRIPLETS

Citation Formats

Chan, Aik Hui, Fritzsch, Harald, Shu, Luo, and Zhizhong, Xing. Deviations from tribimaximal neutrino mixing in the type-II seesaw model and leptogenesis. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.76.073009.
Chan, Aik Hui, Fritzsch, Harald, Shu, Luo, & Zhizhong, Xing. Deviations from tribimaximal neutrino mixing in the type-II seesaw model and leptogenesis. United States. https://doi.org/10.1103/PHYSREVD.76.073009
Chan, Aik Hui, Fritzsch, Harald, Shu, Luo, and Zhizhong, Xing. 2007. "Deviations from tribimaximal neutrino mixing in the type-II seesaw model and leptogenesis". United States. https://doi.org/10.1103/PHYSREVD.76.073009.
@article{osti_21032322,
title = {Deviations from tribimaximal neutrino mixing in the type-II seesaw model and leptogenesis},
author = {Chan, Aik Hui and Fritzsch, Harald and Shu, Luo and Zhizhong, Xing},
abstractNote = {Current experimental data allow the zero value for one neutrino mass, either m{sub 1}=0 or m{sub 3}=0. This observation implies that a realistic neutrino mass texture can be established by starting from the limit (a) m{sub 1}=m{sub 2}=0 and m{sub 3}{ne}0 or (b) m{sub 1}=m{sub 2}{ne}0 and m{sub 3}=0. In both cases, we may introduce a particular perturbation which ensures the resultant neutrino mixing matrix to be the tribimaximal mixing pattern or its viable variations with all entries being formed from small integers and their square roots. We find that it is natural to incorporate this kind of neutrino mass matrix in the minimal type-II seesaw model with only one heavy right-handed Majorana neutrino N in addition to the SU(2){sub L} Higgs triplet {delta}{sub L}. We show that it is possible to account for the cosmological baryon number asymmetry in the m{sub 3}=0 case via thermal leptogenesis, in which the one-loop vertex correction to N decays is mediated by {delta}{sub L} and the CP-violating asymmetry of N decays is attributed to the electron flavor.},
doi = {10.1103/PHYSREVD.76.073009},
url = {https://www.osti.gov/biblio/21032322}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 7,
volume = 76,
place = {United States},
year = {Mon Oct 01 00:00:00 EDT 2007},
month = {Mon Oct 01 00:00:00 EDT 2007}
}