Study of top quark pair production near threshold at the ILC

الأصل · EN

We report on a study of top pair production at the International Linear Collider (ILC) around center of mass energy (E CM) = 350 GeV using an ILD detector simulator based on the Detailed Baseline Design (DBD) configuration. Here we will report on a result of 6-Jet final state, tbart → bWbW → bqqbqq. A result for the 4-Jet final state, tbart → bWbW → bqqblν, which has almost the same statics as that of the 6-Jet final state will be included in the future. For an energy scan of 11 center of mass energy points (340 - 350GeV) and two beam polarization combinations (P(e+,e-) = (±0.3, ∓0.8)) with 10 fb⁻¹ each, the statistical errors on the top quark Yukawa coupling, its mass and width are estimated. The results are δyₜ = 4.2%, δmₜ = 16 MeV in potential subtracted scheme (PS), and δΓₜ = 21 MeV.