Measuring the top Yukawa coupling to a heavy Higgs Boson at future e(+)e(-) linear colliders |
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Authors: | Alcaraz J Morales E R |
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Institution: | CIEMAT, Avenida Complutense 22, 28040-Madrid, Spain. |
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Abstract: | If the Higgs boson mass is greater than 350 GeV, the top quark Yukawa coupling can be determined using the Higgs resonant contribution to t&tmacr; production from W+W- fusion at high energy e(+)e(-) linear colliders. We have evaluated the significance with which the signal of a Higgs decaying to t&tmacr; pairs could be observed at future e(+)e(-) colliders, with center of mass energies of 800 GeV and 1 TeV, and an integrated luminosity of 1 ab(-1). We find that a signal significance greater than 5sigma and a relative error in the top Yukawa measurement better than 10% can be achieved at these facilities, for Higgs boson masses in the ranges of 350-500 GeV and 350-650 GeV, respectively. |
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