Large Higgs energy region in Higgs associated top pair production at the Linear Collider

Journal Article · Fri Jul 01 00:00:00 EDT 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.72.014007· OSTI ID:20711049

Farrell, Cailin; Hoang, Andre H ^[1]

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1. Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut), Foehringer Ring 6, 80805 Munich (Germany)

The process e{sup +}e{sup -}{yields}ttH 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.

• OSTI ID: 20711049
• Journal Information: Physical Review. D, Particles Fields, Vol. 72, Issue 1; Other Information: DOI: 10.1103/PhysRevD.72.014007; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ELECTRON-POSITRON INTERACTIONS
ENERGY SPECTRA
HIGGS BOSONS
HIGGS MODEL
INCLUSIVE INTERACTIONS
INTERMEDIATE BOSONS
LINEAR COLLIDERS
PAIR PRODUCTION
PERTURBATION THEORY
QUANTUM CHROMODYNAMICS
SINGULARITY
TOPONIUM