2018 Impact factor 4.843
Particles and Fields
Eur. Phys. J. C 28, 353-363 (2003)
DOI: 10.1140/epjc/s2003-01180-x

Precision and uncertainties in mass scale predictions in SUSY SO(10) with $SU(2)_{\mathrm {L}}\times
SU(2)_{\mathrm {R}}\times U(1)_{B-L}\times SU(3)_C$ intermediate breaking

M.K. Parida, B. Purkayastha, C.R. Das and B.D. Cajee

Physics Department, North-Eastern Hill University, Shillong 793022, India


(Received: 9 May 2002 / Published online: 31 March 2003)

Abstract
In a class of SUSY SO(10) with $SU(2)_{\mathrm {L}}\times
SU(2)_{\mathrm {R}}\times U(1)_{B-L}\times SU(3)_C$ $(g_{2{\mathrm{L}}}\neq g_{2{\mathrm{R}}})$ intermediate gauge symmetry, we observe that the prediction on the unification mass (MU) is unaffected by Planck-scale-induced gravitational and intermediate-scale threshold effects, although the intermediate scale (MI) itself is subject to such corrections. In particular, without invoking the presence of additional lighter scalar degrees of freedom but including plausible and reasonable threshold effects, we find that interesting solutions for neutrino physics corresponding to $M_{\mathrm{I}}\simeq 10^{10}$- 1013 GeV and $M_{\mathrm{U}}\simeq (5$- $6)\times 10^{17}
$ GeV are permitted in the minimal models. The possibilities of low-mass right-handed gauge bosons corresponding to $M_{\mathrm{I}}\simeq 1$- 10 TeV consistent with the CERN-LEP data are pointed out in a number of models in which threshold effects are included using effective mass parameters.



© Società Italiana di Fisica, Springer-Verlag 2003