Exploiting $h\to W^{\ast }{W}^{\ast }$ Decays at the Upgraded Fermilab Tevatron

Abstract

We study the observability of a Standard Model-like Higgs boson at an upgraded Fermilab Tevatron via the mode $h\to W^{\ast }{W}^{\ast }$. We concentrate on the main channel $gg\to h\to W^{\ast }{W}^{\ast }\to l\nu l\nu$. We also find the mode $q{\bar{q}}^{\prime }\to Wh\to W{W}^{\ast }{W}^{\ast }\to l^{\pm }\nu l^{\pm }\nu jj$ useful. We perform detector level simulations by making use of a Monte Carlo program SHW. Optimized searching strategy and kinematical cuts are developed. We find that with a c.m. energy of 2 TeV and an integrated luminosity of 30 fb${}^{-1}$ the signal should be observable at a 3$\sigma$ level or better for the mass range of 145 GeV < m_h < 180 GeV. For 95% confidence level exclusion, the mass reach is 135 GeV < m_h <190 GeV. We also present results of studying these channels with a model-independent parameterization. Further improvement is possible by including other channels. We conclude that the upgraded Fermilab Tevatron will have the potential to significantly advance our knowledge of Higgs boson physics.

23 pages; 15 figures; 5 tables

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