ZhETF, Vol. 135,
p. 871 (May 2009)
(English translation - JETP,
Vol. 108, No. 5,
available online at www.springer.com
BILEPTON CONTRIBUTIONS TO THE NEUTRINOLESS DOUBLE BETA DECAY IN THE ECONOMICAL 3-3-1 MODEL
Soa D.V., Dong P.V., Huang T.T., Long H.N.
Received: May 29, 2008
PACS: 12.60.Fr, 14.80.Cp, 12.60.Cn
A new bound of the mixing angle between charged gauge bosons (the standard-model W and the bilepton Y) in the economical 3-3-1 model is given. Possible contributions of the charged bileptons to the neutrinoless double beta ((ββ)0
u) decay are discussed. We show that the (ββ)0
u decay in this model is due to both the Majorana and Dirac neutrino masses. If the mixing angle is in the range of the ratio of neutrino masses , the Majorana and Dirac masses are comparable to each other and both may give the main contribution to the decay. As a result, constraints on the bilepton mass are given.