Journal
PHYSICAL REVIEW D
Volume 93, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.93.113010
Keywords
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Funding
- National Thousand Young Talents program [20151710211]
- China Postdoctoral Science Foundation [2015M581062]
- Tsinghua University, Center of High Energy Physics of Tsinghua University
- Collaborative Innovation Center of Quantum Matter of China
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The prospects of searching for the flavor changing neutral current effect in the decay of t -> H-c, H -> tau tau are investigated with the simulated p - p collision data for the ATLAS detector at the LHC, where the Higgs mass is assumed to be 125 GeV. A fit based on the constraints from the Higgs mass and the tau decay kinematics is performed for each event, which improves significantly the Higgs and top mass reconstruction and helps the signal-background separation. Boosted decision trees discriminants are developed to achieve an optimal sensitivity of searching for the flavor changing neutral current signal. An expected upper limit of the branching ratio B(t -> H-c) at 95% confidence level of 0.25% is obtained with a data set of 100 fb(-1) at root s = 13 TeV during the LHC Run-2 period.
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