Sterile neutrino in a minimal three-generation see-saw model

Pramana

Biswajoy Brahmachari1 2¹  Rabindra N Mohapatra³  Sandhya Choubey² 

[1] Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, Kolkata 700 064, India$$;Department of Physics and Astronomy, University of Southampton, Highfield, Southampton SO17 1RJ, UK$$;Department of Physics and Astronomy, University of Maryland, College Park, MD 20742, USA$$

关键词: Sterile;    neutrino;    LSND.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

We investigate symmetries in Dirac and Majorana mass matrices of neutrinos in a three-generation scenario. We show that if we invoke 𝐿e + 𝐿𝜇- 𝐿𝜏 × 𝑆2R symmetry, one combination of right-handed neutrino states remains massless which can be interpreted as a sterile neutrino. Next we consider a 𝑆𝑈(2)𝐿 × 𝑈(1)Y × 𝑈(1)R gauge model and show how higher-dimensional operators can induce mixing between left- and right-handed states which explains solar, atmospheric and LSND experimental results.

【 授权许可】

Unknown