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https://cern.zoom.us/j/98857838063?pwd=U3hVUURjZ1J5SW50cnAwa0MxQ1pCQT09
10+5 discussion, description in minutes.
10+5 discussion, description in notes.
10+5 discussion, description in notes.
Flavorful 2HDMs, that are able to address the SM Flavor Puzzle, have collider signatures that are distinct from well-studied 2HDMs. In particular, the heavy neutral and charged Higgs bosons have decays to first and second generation fermions that are enhanced compared to well-studied 2HDMs, while the decays to third generation fermions can be suppressed. In addition, interesting novel signatures include heavy neutral Higgs bosons that decay in a flavor-violating way, as well as rare top decays t -> hq (where h is the SM-like Higgs boson) that are orders of magnitude greater than SM predictions. Current standard LHC searches for heavy Higgs bosons are not the most sensitive probes of our model, and it would be interesting to study the capability of HL/HE LHC and future colliders, such as the FCC, to probe the distinct signatures of our model. In addition, we predict deviations of the SM-like Higgs boson couplings to 2nd generation fermions that will be constrained by future projections of SM Higgs couplings.
10+5 discussion, description in notes.
Tagging jets of strongly interacting particles initiated by energetic strange quarks is one of the few largely unexplored Standard Model object classification problems remaining in high energy collider physics. We investigate the purest version of this classification problem in the form of distinguishing strange-quark jets from down-quark jets. Our strategy relies on the fact that a strange-quark jet contains on average a higher ratio of neutral kaon energy to neutral pion energy than does a down-quark jet. We study different approaches to distinguishing strange-quark from down-quark jets, including single variable cut-based methods, a boosted decision tree with a small number of simple variables, and a deep learning convolutional neural network architecture with jet images.
10+5 discussion, description in notes.
We point out that the stringent lower bounds on the masses of new Higgs bosons crucially depend on the flavor structure of their Yukawa interactions. We show that these bounds can easily be evaded by the introduction of flavor-changing neutral currents in the Higgs sector, that are in agreement with low energy flavor constraints. As an illustration, we discuss the LHC phenomenology of a two Higgs doublet model with a Yukawa texture singling out the third family of quarks and leptons.