2,014 research outputs found
Probing and Interaction at LHC
Many new physics models predict the existence of TeV-scale charged gauge
boson together with Higgs boson(s). We study the
interaction and explore the angular distribution of charged lepton to
distinguish from in process at the LHC. It is found that a new type forward-backward
asymmetry() relating to the angle between the direction of the charged
lepton in rest frame and that of the reconstructed in laboratory
frame is useful to investigate the properties of interaction. We
analyze the Standard Model backgrounds and develop a set of cuts to highlight
the signal and suppress the backgrounds at LHC. We find that can reach
0.03(-0.07) for () production at TeV
Charged lepton flavor violating Higgs decays at future colliders
After the discovery of the Higgs boson, several future experiments have been
proposed to study the Higgs boson properties, including two circular lepton
colliders, the CEPC and the FCC-ee, and one linear lepton collider, the ILC. We
evaluate the precision reach of these colliders in measuring the branching
ratios of the charged lepton flavor violating Higgs decays ,
and . The expected upper bounds on the
branching ratios given by the circular (linear) colliders are found to be
, and at 95\% CL, which are improved by
one to two orders compared to the current experimental bounds. We also discuss
the constraints that these upper bounds set on certain theory parameters,
including the charged lepton flavor violating Higgs couplings, the
corresponding parameters in the type-III 2HDM, and the new physics cut-off
scales in the SMEFT, in RS models and in models with heavy neutrinos.Comment: 20 pages, 2 figures (extend the CEPC study to the FCC-ee and the ILC,
and to match the published version
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