Low-mass right-handed gauge bosons, proton decay, and other observable predictions in SU(8){sub {ital L}}{times}SU(8){sub {ital R}} and SU(16)
- Physics Department, North Eastern Hill University, P.O. Box 21, Shillong 793003 (India)
The prospects of an alternative method of decoupling the parity and SU(2){sub {ital R}} breaking are reexamined under the constraints of CERN LEP measurements in the minimal chains of SU(8){sub {ital L}}{times}SU(8){sub {ital R}} and SU(16) grand unified theories. Including the uncertainties in the input parameters, one chain permits the SU(2){sub {ital L}}{times}SU(2){sub {ital R}}{times}SU(4){sub {ital C}}-breaking scale {ital M}{sub {ital C}}=10{sup 5.6{plus_minus}0.6} GeV leading to the {Delta}({ital B}{minus}{ital L})={minus}2 nucleon-decay modes possibly accessible to the ongoing experiments and observable branching ratios for rare kaon decays. Uncertainties in the Higgs scalar masses near {ital M}{sub {ital C}} result in wider ranges of predictions on the proton lifetime and mixing times for {ital n}-{ital {bar n}} and {ital H}-{ital {bar H}} oscillations. In a separate chain the SU(2){sub {ital L}}{times}SU(2){sub {ital R}}{times}U(1){sub {ital B}{minus}{ital L}}{times}SU(3){sub {ital C}}-breaking scale corresponding to the masses of right-handed gauge bosons could be {ital M}{sub {ital R}}=10{sup 2.8{plus_minus}0.7} GeV, which seems to be the lowest value predicted so far in a non-SUSY GUT consistent with minimal fine-tuning of parameters.
- OSTI ID:
- 69244
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 1 Vol. 52; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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