Flavour-changing top decays in the aligned two-Higgs-doublet model

被引：0
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作者：
Gauhar Abbas
Alejandro Celis
Xin-Qiang Li
Jie Lu
Antonio Pich
机构：
[1] IFIC,Ludwig
[2] Universitat de València — CSIC,Maximilians
[3] Arnold Sommerfeld Center for Theoretical Physics,Universität München, Fakultät für Physik
[4] Central China Normal University,Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics (MOE)
[5] Chinese Academy of Sciences,State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics
[6] Shanghai University,Department of Physics
来源：
Journal of High Energy Physics | / 2015卷
关键词：
Rare Decays; Beyond Standard Model; Heavy Quark Physics;
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摘要：
We perform a complete one-loop computation of the two-body flavour-changing top decays t → ch and t → cV (V = γ, Z), within the aligned two-Higgs-doublet model. We evaluate the impact of the model parameters on the associated branching ratios, taking into account constraints from flavour data and measurements of the Higgs properties. Assuming that the 125 GeV Higgs corresponds to the lightest CP-even scalar of the CP-conserving aligned two-Higgs-doublet model, we find that the rates for such flavour-changing top decays lie below the expected sensitivity of the future high-luminosity phase of the LHC. Measurements of the Higgs signal strength in the di-photon channel are found to play an important role in limiting the size of the t → ch decay rate when the charged scalar of the model is light.
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