G. Montagna — Page 6

arXiv1995

HIGGS BOSON PRODUCTION IN $e^+ e^- \to μ^+ μ^- b \bar b$

The production of the Standard Model Higgs boson in the four-fermion reaction $e^+ e^- \to μ^+ μ^- b \bar b$ is studied. The complete tree-level matrix element, including signal and backgrounds in the standard electroweak theory, is computed and initial state radiation is taken into account in the leading-log approximation. A Monte Carlo event generator has been built and numerical results for some distributions of experimental interest for the search of the Higgs particle at future electron-positron colliders are shown, compared with those existing in the literature and commented.

hep-ph↗

arXiv1994

Semi-analytical and Monte Carlo results for the production of four fermions in $e^+ e^-$ collisions

In view of the forthcoming experiments at high energy $e^+ e^-$ colliders, LEP2 and beyond, the process $e^+ e^- \to W^+ W^- \to 4f$ has been investigated for {\it off-shell} $W$'s. After deriving the matrix element for the process within the helicity amplitude formalism, QED radiative corrections to the initial state leptons have been included at the leading logarithmic level in the framework of the electron structure functions. Cross sections and distributions are computed by means of both a semi-analytical and a Monte Carlo code, allowing for several cuts of experimental interest. A Monte Carlo event generator has also been built, for simulation purposes. Some illustrative numerical results are included and shortly described.

hep-ph↗