2021 Impact factor 4.991
Particles and Fields
Eur. Phys. J. C 2, 483-496
DOI 10.1007/s100529800707

Six-fermion calculation of intermediate-mass Higgs boson production at future $\bf {e^+ e^-}$ colliders

Guido Montagna1,2 - Mauro Moretti3 - Oreste Nicrosini2,1 - Fulvio Piccinini2,1

1 Dipartimento di Fisica Nucleare e Teorica, Università di Pavia, I-27100 Pavia, Italy (e-mail: montagna@pv.infn.it)
2 INFN, Sezione di Pavia, I-27100 Pavia, Italy (e-mail: nicrosini@pv.infn.it, nicrosini@vxcern.cern.ch, piccinini@pv.infn.it)
3 Dipartimento di Fisica, Università di Ferrara and INFN, Sezione di Ferrara, I-44100 Ferrara, Italy (e-mail: moretti@axpfe1.fe.infn.it)

Received: 22 May 1997 / Published online: 20 February 1998

The production of an intermediate-mass Higgs boson in processes of the kind $e^+ e^- \to 6$ fermions at the energies of future linear colliders is studied. The recently developed and fully automatic algorithm/code ALPHA is used to compute the tree-level scattering amplitudes for the reactions $e^+ e^- \to \mu^+ \mu^- \tau^- \bar\nu_{\tau} u \bar d, \mu^+ \mu^-
e^- \bar\nu_{e} u \bar d$. The code has been interfaced with the Monte Carlo program HIGGSPV/WWGENPV, properly adapted to 6-fermion production, in order to provide realistic results, both in the form of cross sections and event samples at the partonic level. Phenomenological results, that incorporate the effects of initial-state radiation and beamstrahlung, are shown and commented, emphasizing the potentials of full six-fermion calculations for precise background evaluation as well as for detailed studies of the fundamental properties of the Higgs particle.

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