2015/03/22 by Gauhar Abbas, Abbas, Gauhar, Alejandro Celis +7 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle Detector Development and Performance #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.1503.06423
openalex publication_date 2015/03/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We perform a complete one-loop computation of the two-body flavour-changing top decays t → c h and t → c V (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 → c h decay rate when the charged scalar of the model is light.