出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Within the framework of an SU(5) SUSY GUT model, a mechanism which
e
ectively induces R-parity-violating terms below the uni cation energy scale MX is proposed.
The model has matter elds 5L(+) + 10L(−) and Higgs elds H(−) and H(+) in
addition to the ordinary Higgs elds H(+) and H(−) which contribute to the Yukawa
interactions, where () denote the transformation properties under a discrete symmetry
Z2. The Z2 symmetry is only broken by the -term H(+)H(−) softly, so that the
5(+)
$ H(+)
$ H(−) mixing appears at < mSB, and R-parity violating terms 5L5L10L
are e
ectively induced from the Yukawa interactions H(−)5L(+)10L(−), i.e. the e
ective
coupling constants ijk of LieLjec
Rk and Lidc
RjdLk are proportional to the mass matrices
(M
e )jk and (M
y
d )jk, respectively. The parameter regions which are harmless for the
proton decay are investigated. Possible forms of the radiatively induced neutrino mass
matrix are also investigated.
