Les Houches

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Chair: Veronica Sanz (VH), Christoph Englert (HH)

Members: Fawzi Boudjema, Adam Falkowski, Benjamin Fuks, Florian Goertz, Jose Santiago, Jose Miguel No, Felix Yu, Adam Martin, Cirian Williams. Please add your name if it is missing.

Topics for discussion VH:

• Analyses
  1. ATLAS: VH(→ bb) in http://arxiv.org/pdf/1409.6212.pdf
  2. ATLAS: VH(→WW) https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2015-005/
  3. CMS:

• SM contributions to VH at one loop: Fawzi to dig old works on this
• tree-level:
  1. Dilaton, radion exchange: Matching in http://arxiv.org/pdf/1502.07352.pdf
  2. Composite Higgs type spin-one exchange: Adam F.to find reference
• one-loop:
  1. 2HDM: Matching in http://arxiv.org/pdf/1502.07352.pdf
  2. Colored scalars: region of cancellations in gg→ h can be seen in Eq.18 of http://arxiv.org/pdf/1207.7355.pdf, see also http://arxiv.org/pdf/1312.3317.pdf. Matching colored scalars with EFT in http://arxiv.org/pdf/1412.1837v1.pdf and http://arxiv.org/pdf/1504.02409.pdffor non-degenerate stops.
  3. Spin-one: From Composite-Higgs type. Alexandra O.

Topics for discussion HH:

1. How big can pp>HH be in concrete UV scenarios
   • colored scalars (recast MSSM?) : region of cancellations in gg→ h can be seen in Eq.18 of http://arxiv.org/pdf/1207.7355.pdf, see also http://arxiv.org/pdf/1312.3317.pdf. Matching colored scalars with EFT in http://arxiv.org/pdf/1412.1837v1.pdf and http://arxiv.org/pdf/1504.02409.pdffor non-degenerate stops.
   • 2HDM : Matching of the c_6 to 2HDM is in http://arxiv.org/pdf/1502.07352.pdf, Eq 3.41, and Eq. 3.28 in the alignment limit.
2. What is the EFT parameter range expected from such scenarios
3. Are dim 6 unitarity constraints relevant for the limit setting
4. How much can we learn from binned distribution at a small expected signal yield
5. Backgrounds in HH
   • mass resolution of Higgs tagging
     • Can we control Z>bbar
     • can we disentangle dim 6 effects from qq>HZ leakage
   • What is needed to control the backgrounds better