Limits on the Majorana neutrino mass and right-handed weak currents by neutrinoless double β decay of 100Mo -: art. no. 065501

Spectroscopic studies of neutrinoless double beta decays (0 nu beta beta) from Mo-100 were made by means of ELEGANT V. The most stringent limits on the 0 nu beta beta half-lives were obtained for the ground state transitions T-1/2(0 nu)(m(nu)) > 5.5(10.3) x 10(22). T-1/2(0 nu)(lambda) > 4.2(8.5) x 10(22), and T-1/2(0 nu)(eta) > 4.9(9.3) x 10(22) yr, with 90(68)% C.L., for the mass term and for the right-handed weak current terms of < gamma > and < eta >, respectively. Using the nuclear matrix elements of the QRPA calculation by Tomoda et al., these limits lead to upper limits of < 2.1(1.5) eV, lambda > < 3.2(2.5) x 10(-6), and eta > < 2.4(1.9) x 10(-8) with 90(68)% C.L. Limits on other terms beyond the standard theory are also discussed.