Measuring the top-quark Yukawa coupling at hadron colliders via tt̄h, h → W+W−
نویسندگان
چکیده
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 uncertainty.
منابع مشابه
Measuring the top Yukawa coupling to a heavy Higgs Boson at future e(+)e(-) linear colliders.
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 کاملWeak Interactions in Top-Quark Pair Production at Hadron Colliders: An Update
Weak corrections for top-quark pair production at hadron colliders are revisited. Predictions for collider energies of 8 TeV, adopted to the present LHC run, and for 14 TeV, presumably relevant for the next round of LHC experiments, are presented. Kinematic regions with large momentum transfer are identified, where the corrections become large and may lead to strong distortions of differential ...
متن کاملMEASURING 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...
متن کاملModel Independent Determination of the Top Yukawa Coupling from LHC and LC
We show how a measurement of the process pp → tt̄H +X at the LHC and a measurement of the Higgs boson branching ratios BR(H → bb̄) and BR(H → WW) at a future linear electron positron collider can be combined to extract amodel-independent measurement of the top quark Yukawa coupling. We find that for 120 GeV < mH < 200 GeV a measurement precision of 15% including systematic uncertainties can be ac...
متن کاملQCD Corrections to Scalar Production via Heavy Quark Fusion at Hadron Colliders
We recently proposed that, due to the top-quark-mass enhanced Yukawa coupling, the s-channel production of a charged scalar or pseudo-scalar from heavy quark fusion can be an important new mechanism for discovering non-standard spin-0 particles. In this work, we present the complete O(αs) QCD corrections to this s-channel production process at hadron colliders, and also the results of QCD resum...
متن کامل