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Higgs and Flavor

US/Central
Description

Zoom:

https://cern.zoom.us/j/98857838063?pwd=U3hVUURjZ1J5SW50cnAwa0MxQ1pCQT09

    • 12:00 12:10
      Intro 10m
      Speakers: Isobel Ojalvo (Princeton University (US)), Patrick Meade (Stony Brook University)
    • 12:10 12:25
      Probing light Yukawa couplings in Higgs pair production 15m

      10+5 discussion, description in minutes.

      Speaker: Ramona Gröber

      I will discuss the potential of Higgs pair production to probe the couplings of the Higgs boson to the first two quark generations in an EFT approach. Indeed, the prospects are similar to other methods due to a coupling of two Higgs bosons to two fermions

    • 12:25 12:40
      Theories of Enhanced Light Yukawa Couplings 15m

      10+5 discussion, description in notes.

      Speaker: Samuel Homiller (YITP, Stony Brook)

      I will discuss UV complete theories which give rise to enhanced Yukawa couplings of the SM Higgs to first and second generation fermions, and how these theories can be probed at the LHC and beyond, including some new signatures that require dedicated searches.
       

    • 12:40 12:55
      Constraints on Flavorful Two Higgs Doublet Models from Future Colliders 15m

      10+5 discussion, description in notes.

      Speaker: Douglas Tuckler (Fermi National Accelerator Laboratory)

      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. 

    • 12:55 13:10
      Strange Jet Tagging 15m

      10+5 discussion, description in notes.

      Speaker: Yuichiro Nakai

      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.
       

    • 13:10 13:45
      Discussion 35m
    • 13:45 14:00
      The role of flavor in heavy higgs searches (Next Meeting) 15m

      10+5 discussion, description in notes.

      Speaker: Stefania Gori (UC Santa Cruz)

      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.