Limits on neutrino-less double beta decay of 100Mo

✍ Scribed by H. Ejiri; K. Fushimi; K. Hayashi; R. Hazama; T. Kishimoto; N. Kudomi; K. Kume; K. Nagata; H. Ohsumi; K. Okada; T. Shima; J. Tanaka

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 515 KB
• Volume: 611
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(96)00332-6

✦ Synopsis

Exclusive measurements of neutrino-less double beta decays (0u/3/3) of t°°Mo were made by means of ELEGANT V. Most stringent lower limits on the half-lives for the ground-state transition were obtained for the 0u/3/3 processes as T~172(m~) > 5.2 × 10 22 y, T~l/~2(,~) > 3.9 × 10 22 y and ~%(~7) > 5.1 x 10 22 y, for the mass term (rn~), for the right-handed current terms of (A) and It/), respectively, and as T~I/~ > 5.4 x 10 21 y for the process (0pflflB) followed by a Majoron (B). These limits lead to the upper limits of (my) < 2.2 eV, (A) < 3.7 × 10 -6, (r/) < 2.5 × 10 -8 and (gB) < 7.3 × 10 -5 with gB being the coupling of B with the neutrino field. Limits on other possible processes beyond the standard theory are discussed.