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 $H\ar b\bar b$ and $H\ar WW\ar {jjjj}$, 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^-\ar\bar\nu_e\nu_e H \ar \bar\nu_e\nu_e b\bar b $ and $e^+e^-\ar\bar\nu_e\nu_e H \ar \bar\nu_e\nu_e WW \ar \bar\nu_e\nu_e {jjjj}$ are compared to those of the next-to-leading reactions $e^+e^-\ar\bar\nu_e\nu_e H (\gamma)\ar \bar\nu_e\nu_e b\bar b \gamma$ and $e^+e^-\ar\bar\nu_e\nu_e H (\gamma)\ar \bar\nu_e\nu_e WW (\gamma) \ar \bar\nu_e\nu_e {jjjj}\gamma$, in the case of hard and detectable photons. Finally, a brief discussion concerning the case of $H\ar ZZ\ar{jjjj} (\gamma)$ decays is also given.