Measurement of the top-Higgs Yukawa coupling at a Linear e+e- Collider

Abstract

Understanding the mechanism of electroweak symmetry breaking and the origin of boson and fermion masses is among the most pressing questions raised in contemporary particle physics. If these issues involve one (several) Higgs boson(s), a precise measurement of all its (their) properties will be of prime importance. Among those, the Higgs coupling to matter fermions (the Yukawa coupling). At a Linear Collider, the process e+e- -> ttH will allow in principle a direct measurement of the top-Higgs Yukawa coupling. We present a realistic feasibility study of the measurement in the context of the TESLA collider. Four channels are studied and the analysis is repeated for several Higgs mass values within the range 120 GeV - 200 GeV.

Added reference for section 2

Cited by in corpus (6)

• Single production of the top partners at high energy colliders
• Measuring the top Yukawa coupling at the ILC at sqrt(s) = 500 GeV
• The production and decay of the top partner $T$ in the left-right twin higgs model at the ILC and CLIC
• Full simulation study of the top Yukawa coupling at the ILC at $\sqrt{s}$ = 1 TeV
• Top Yukawa coupling measurement with indefinite CP Higgs in $e^{+}{e}^{-}\to t\bar{t}\Phi$
• Higgs boson production and decay at $e^{+}{e}^{-}$ colliders as a probe of the Left-Right twin Higgs model