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

Abstract

We study at LEP II and Next Linear Collider energies Higgs production via the bremsstrahlung channel $e^+e^-\ar ZH$, with $Z\ar μ^+μ^-$ 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 $e^+e^-\ar μ^+μ^- b\bar bγ$ and makes use of the one at leading order $e^+e^-\ar μ^+μ^- b\bar b$ 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.

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

References in corpus (15)

• Observation of Top Quark Production in Pbar-P Collisions
• Observation of the Top Quark
• Automatic Generation of Tree Level Helicity Amplitudes
• EXCALIBUR -- a Monte Carlo program to evaluate all four fermion processes at LEP 200 and beyond
• All electroweak four fermion processes in electron-positron collisions
• How suppressed are the radiative interference effects in heavy unstable particle production?
• Quark Mass Effects in Fermionic Decays of the Higgs Boson in $O({\alpha }_s^2)$ Perturbative QCD
• Initial-state QED corrections to four-fermion production in e+e- collisions at LEP200 and beyond
• Production and decay of the Standard Model Higgs Bososn at LEP200
• THE PROCESS $e^{+}{e}^{-}\to l\bar{l}q\bar{q}$ AT LEP AND NLC
• Semi-analytical and Monte Carlo results for the production of four fermions in $e^{+}{e}^{-}$ collisions
• EEWW: a generator for $e^{+}{e}^{-}\to W^{+}{W}^{-}$ including one-loop and leading photonic two-loop corrections
• $e^{+}{e}^{-}\to b\bar{b}{W}^{+}{W}^{-}$ at the Next Linear Collider, Top-Pairs and Higgs Production
• Higgs production in $e^{+}{e}^{-}\to l\bar{l}q\bar{q}$ at LEP and NLC
• Higgs Production and Decay via $e^{+}{e}^{-}\to Z^0{H}^0\to b\bar{b}{W}^{+}{W}^{-}$ and Irreducible Backgrounds at the Next Linear Collider

Cited by in corpus (1)

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