Measuring the top quark Yukawa coupling at a lineare+e−collider
نویسندگان
چکیده
منابع مشابه
MEASURING THE TOP QUARK YUKAWA COUPLING AT A LINEAR e+e− COLLIDER
The cross section for the reaction ee → tt̄H depends sensitively on the top quark Yukwawa coupling λt. We calculate the rate for tt̄H production, followed by the decay H → bb̄, for a Standard Model Higgs boson with 100GeV≤mH ≤ 130GeV. We interface with ISAJET to generate QCD radiation, hadronization and particle decays. We also calculate the dominant tt̄bb̄ backgrounds from electroweak and QCD proce...
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We study the signal and background for the process tt̄h, h → WW at the LHC and a 100 TeV VLHC. Signals are studied in two-, three-, and four-lepton final states. We find a statistical uncertainty in the top-quark Yukawa coupling at the LHC of 16%, 8%, 12% for mh = 130, 160, 190 GeV, respectively. The statistical uncertainty at the VLHC is likely to be negligible in comparison with the systematic...
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There are theoretical speculations that the top quark may have different properties from that predicted by the standard model. We use an effective Lagrangian technique to model such a non-standard top quark scenario. We parametrize the CP violating interactions of the top quark with the bubble wall in terms of an effective top quark Yukawa coupling, then study its effects on the electroweak bar...
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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 G...
متن کاملYukawa Correction to Top-quark Production at the Tevatron
We calculate the correction to qq̄ → tt̄ of order g2m2t/M2 W . This correction, proportional to the square of the Higgs-boson Yukawa coupling to the top quark, arises from loops of Higgs bosons and the scalar component of virtual vector bosons. The Yukawa correction to the total tt̄ production cross section at the Fermilab Tevatron in the standard Higgs model is found to be much less than the theo...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1999
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.61.013002