DOI 10.1007/s100520000293
New formulas and predictions for running masses at higher scales in MSSM
M.K. Parida1,2 - B. Purkayastha1
1 Physics Department,
North Eastern Hill University, Shillong 793022,
India
2 The Abdus Salam International Centre for
Theoretical Physics, Trieste, Italy
Received: 30 July 1999 / Published online: 6 April 2000 - © Springer-Verlag 2000
Abstract
The effects of the scale dependent vacuum expectation values
(VEVs)
on the running
masses of quarks and leptons in non-SUSY gauge theories have
been
considered
by a number of authors. Here we use RGEs of the VEVs, and the
gauge and Yukawa couplings
in the MSSM to analytically derive new one loop formulas for
the running
masses above the SUSY breaking scale. Some of the masses exhibit
a substantially
different behaviour with respect to their dependence on the gauge
and Yukawa
couplings when compared with earlier formulas in the MSSM derived
ignoring
RGEs of VEVs. In particular, the masses of the first two generations
are
found to be independent of the Yukawa couplings of the third
generation in
the small mixing limit. New numerical estimates at the two loop
level are also
presented.
Copyright Società Italiana di Fisica, Springer-Verlag 2000
