Effect of contact ineractions on higgs production cross-section at an $e^{+}{e}^{-}\to HZ$ collider

Abstract

New interactions appearing at a scale $\Lambda$ larger than the weak interaction scale v can affect physical processes at energies below $\Lambda$ through non-renormalizable $SU(3)\times SU(2)\times U(1{)}_y$ invariant operators added to the standard model Lagrangian. In this article we investigate the effect of flavor conserving contact interactions on the total cross-section for the process $e^{+}{e}^{-}\to HZ$ at $\text{sqs}=500$ Gev. We find that for $\Lambda \approx 2.5$ Tev, which is consistent with LEP and SLD asymmetry measurements on Z peak as well as theoretical estimates, these operators can increase the total cross-section by a factor of 3 relative to the SM for intermediate mass higgs boson.

Comments: Plain Tex, 9 pages, No figures