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Prog. Theor. Phys. Vol. 85 No. 3 (1991) pp. 437-439

Letters

Simpson's Heavy Neutrino and the Majorana Neutrino Hypothesis

Masataka Fukugita and Tsutomu Yanagida^*

Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606
^*Department of Physics, Tohoku University, Sendai 980

(Received January 14, 1991)

Abstract:

If the neutral particle with a mass of 17 keV found by Simpson is identified with one of the neutrinos of the Majorana type, strong constraints are derived on the neutrino mass matrix from existing experiments on neutrinoless double beta decays and neutrino oscillations. In particular we found that m_νµ ≃(180–250) keV with sin ²2θ_νeνµ ≃ 0.002–0.003. The presence of the second-generation right-handed neutrino is also predicted at around the mass of M ∼50 GeV with the aid of the seesaw mechanism.

URL : http://ptp.ipap.jp/link?PTP/85/437/
DOI : 10.1143/PTP.85.437

[ Full Text PDF : FREE ACCESS (135K) ] Citation: Plain Text BiBTeX EndNote(RIS) RSS

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