Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-01-15
Phys.Rev.D72:095016,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
57 Pages, 13 Tables, 7 Figs.; PACS: 12.10.Dm, 12.60.Cn; http://link.aps.org/abstract/PRD/v72/e095016
Scientific paper
10.1103/PhysRevD.72.095016
The conventional method using low energy theorems [3] does not seem to lead to an explicit unitarity limit in the scattering processes of longitudinally polarized gauge bosons for the high energy case in the extra U(1) superstring inspired models, commonly known as eta model, emanating from E6 group of superstring theory. We have made use of an alternative procedure given in [14], which is applicable to SUSY GUT. Explicit unitarity bounds on the Yukawa couplings are obtained from both using unitarity constraints as well as using RGE analysis at one-loop level utilizing critical couplings concepts implying divergence of scalar coupling at MG. These are found to be consistent with finiteness over the entire range MZ<=sqrt(s)<=MG. For completeness, the similar approach has been made use of in other models, i.e., chi, psi, and nu models emanating from E6 and it has been noticed that at weak scale, the unitarity bounds on Yukawa couplings do not differ among E6 extra U(1) models significantly except for the case of chi model in 16 representations. Theoretically we have obtained the upper bounds on top quark and lightest neutral higgs boson mass using the unitarity constrained superpotential couplings and also obtained the D-quark mass as a function of MZ2 is O(3 TeV) for MZ2 is O(1 TeV). The obtained bounds on these physical parameters are found consistent with the present day experimental precision measurements.
Nagawat Ashok K.
Parashar Prachi
Saxena Pranav
Sharma Naresh K.
Singh Sardar
No associations
LandOfFree
Low energy theorems and the unitarity bounds in the extra U(1) superstring inspired E6 models does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Low energy theorems and the unitarity bounds in the extra U(1) superstring inspired E6 models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low energy theorems and the unitarity bounds in the extra U(1) superstring inspired E6 models will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-150651