Standard Model Higgs boson production and hard photon radiation in $e^+e^-\to μ^+μ^- b\bar bγ$ events at LEP II and Next Linear Collider

Details Standard Model Higgs boson production and hard photon radiation in $e^+e^-\to μ^+μ^- b\bar bγ$ events at LEP II and Next Linear Collider Standard Model Higgs boson production and hard photon radiation in $e^+e^-\to μ^+μ^- b\bar bγ$ events at LEP II and Next Linear Collider

1995-12-22

arxiv.org/abs/hep-ph/9512408v3

J.Phys.G22:959-979,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

ISR added, main conclusions unchanged (to be published in J. Phys. G)

Scientific paper

10.1088/0954-3899/22/7/005

We study at LEP II and Next Linear Collider energies Higgs production via the bremsstrahlung channel $e^+e^-\ar ZH$, with $Z\ar \mu^+\mu^-$ and $H\ar b\bar b$, and the corresponding irreducible background, in presence of hard photon radiation, both from the initial and the final state. We carry out an analysis that includes the computation of all the relevant contributions to the complete tree--level matrix element for $e^+e^-\ar \mu^+\mu^- b\bar b\gamma $ and makes use of the one at leading order $e^+e^-\ar \mu^+\mu^- b\bar b$ interfaced with electron structure functions. We concentrate on the case of mass degeneracy $M_H\approx M_Z$, for which next--to--leading electromagnetic contributions can modify the content of $b\bar b$--pairs coming from $H$ and $Z$ decays. A brief discussion concerning the case $M_H\not\approx M_Z$ is also given.

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