| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
We computed top quark threshold cross section near 340GeV beam energy at future ILC aiming precision top mass and Yukawa coupling measurements. We made a C++ computer program, qqbar_threshold, which computes the threshld cross section in the framework of non-relativistic QCD. The code includes NNNLO QCD corrections as well as dominant electroweak corrections so that reliable theory prediction is available for phenomenology analysis.
We investigated limit of theoretical error on the top mass determination in threshold scan, and showed the accuracy is about 30 MeV. We studied the sensitivity of the threshold cross section on top quark width, Yukawa coupling and othere parameters.
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