CONSTRAINTS OF MIXING ANGLES FROM NEUTRINO OSCILLATION EXPERIMENTS AND NEUTRINOLESS DOUBLE BETA DECAY

Modern Physics Letters A - Tập 13 Số 28 - Trang 2279-2287 - 1998
Takeshi Fukuyama1, Kouichi Matsuda1, Hiroyuki Nishiura2
1Department of Physics, Ritsumeikan University, Kusatsu, Shiga 525, Japan
2Department of General Education, Junior College of Osaka Institute of Technology, Asahi-ku, Osaka 535, Japan

Tóm tắt

From the analyses of the recent data of neutrino oscillation experiments (especially the CHOOZ and the super-Kamiokande experiments), we discuss how these data affect the neutrinoless double beta decay ((ββ)0ν) rate and vice versa assuming that neutrinos are Majorana particles. For the case of m1~m2≪m3 (mi are neutrino masses), we obtain, from the data of the CHOOZ and super-Kamiokande, 0.28 ≲ sin 2θ23≲ 0.76 and sin 2θ13≲ 0.05. Combining the latter constraint with the analysis of the "averaged" neutrino mass <mν> appeared in (ββ)0ν, we find that [Formula: see text], which leads to the constraint on <mν> as <mν> ≲ 0.05m3 + (1 - 0.05)m2. For the case of m1≪m2~ m3, we find that the data of neutrino oscillation experiments and (ββ)0ν imply the following constraints of mixing angles: if 0.95m3≲ <mν> < m3, [Formula: see text]. If <mν> ≲ 0.95m3, [Formula: see text] and [Formula: see text].

Từ khóa


Tài liệu tham khảo

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Modern Physics Letters A

Tập 13 Số 28

2279-2287

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