Higgs signals and hard photons via $WW$-fusion in the Standard Model at the Next Linear Collider

Abstract

Within the framework of the Standard Model, integrated and differential distributions are given for Higgs production via the $WW$-fusion mechanism and decay via the channels $H\text{ar}b\bar{b}$ and $H\text{ar}WW\text{ar}jjjj$, with and without photon radiation, at Next Linear Collider energies. Calculations are carried out at tree-level and rates of the leading processes $e^{+}{e}^{-}\text{ar}{\bar{\nu }}_e{\nu }_{e}H\text{ar}{\bar{\nu }}_e{\nu }_{e}b\bar{b}$ and $e^{+}{e}^{-}\text{ar}{\bar{\nu }}_e{\nu }_{e}H\text{ar}{\bar{\nu }}_e{\nu }_{e}WW\text{ar}{\bar{\nu }}_e{\nu }_{e}jjjj$ are compared to those of the next-to-leading reactions $e^{+}{e}^{-}\text{ar}{\bar{\nu }}_e{\nu }_{e}H(\gamma )\text{ar}{\bar{\nu }}_e{\nu }_{e}b\bar{b}\gamma$ and $e^{+}{e}^{-}\text{ar}{\bar{\nu }}_e{\nu }_{e}H(\gamma )\text{ar}{\bar{\nu }}_e{\nu }_{e}WW(\gamma )\text{ar}{\bar{\nu }}_e{\nu }_{e}jjjj\gamma$, in the case of hard and detectable photons. Finally, a brief discussion concerning the case of $H\text{ar}ZZ\text{ar}jjjj(\gamma )$ decays is also given.

Comments: 27 pages, LaTeX, 10 PostScript figures embedded using epsfig, 8 figures bitmapped at 100dpi, complete paper with higher resolution figures available at ftp://axpa.hep.phy.cam.ac.uk/moretti/cavendish_9607 or at http://www.hep.phy.cam.ac.uk/theory/papers/