The Large Higgs Energy Region in Higgs Associated Top Pair Production at the Linear Collider

Abstract

The process e^+ e^- to t \bar t H is considered in the kinematic end point region where the Higgs energy is close to its maximal energy. In perturbative QCD, using the loop expansion, the amplitudes are plagued by Coulomb singularities that need to be resummed. We show that the QCD dynamics in this end point region is governed by nonrelativistic heavy quarkonium dynamics, and we use a nonrelativistic effective theory to compute the Higgs energy distribution at leading and next-to-leading logarithmic approximation in the nonrelativistic expansion. Updated numbers for the total cross section including the summations in the Higgs energy end point region are presented.

18 pages, 5 figures, and 3 tables; minor changes in text and references, typo in Eq.(32) fixed

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Cited by in corpus (15)

• Physics at the e+ e- Linear Collider
• Determining the CP properties of the Higgs boson
• Fully-differential Top-Pair Production at a Lepton Collider: From Threshold to Continuum
• Measuring the top Yukawa coupling at the ILC at sqrt(s) = 500 GeV
• Heavy Pair Production Currents with General Quantum Numbers in Dimensionally Regularized NRQCD
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• Probing the CP properties of top Yukawa coupling at an $e^{+}{e}^{-}$ collider
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• Measurement of the top-Higgs Yukawa coupling at a Linear e+e- Collider
• Top quark mass measurement in radiative events at electron-positron colliders
• Off resonance background effects in e+e- -> t anti-t H
• Top Threshold Physics
• Full one-loop supersymmetric electroweak corrections to $t\bar{t}{h}^0$ associated production in $e^{+}{e}^{-}$ annihilation
• Effects of the t t-bar threshold in e+e- to t t-bar H