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Les Houches

2021 Session

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Les Houches Themes



Compressed spectra, stops, EWinos

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  • Proposal to study pp→ chi2,chi3 → gamma l^+ l^- chi1 chi1. Signal with low MET if chi1 much lighter than nearly degenerate chi2,chi3.
  • Higgs to electroweakino ⇒ in Higgs group Higgs to electroweakino
  • EWinos decays to other (light) Higgses e.g. in NMSSM ⇒ cross-section too small if decays into Higgs. Is there anything not covered by 2HDM Higgs searches? Daniele Barducci, Genevieve Belanger, Dipan Sengupta

Compressed spectra

  • Analyse the decay squark → q lepton + RH sneutrino in a regime where the squark, sneutrino splitting is small (as arises in some Pati-Salam type of GUTs). Basic question: How large the splitting must be for the signal to be visible at the LHC? Leader: Werner Porod, other members:???
  • What prospectfo ISR tagging?
  • Studying dilepton invariant mass distribution below 20GeV might be needed if compressed spectra. Leader: ???, other members:???


  • Is light stop totally excluded in the MSSM? Leader:Giacomo P. other members:??? Two holes hard to analyse: 1) stop close in mass with LSP+top, in a regime where top cross-section measurements doesn't help. 2) stop → b chargino in a regime where W is off-shell.
  • Which Higgs mass tool to trust in a regime where stops are around 1TeV. Spheno,softSUSY,suspect VS. FeynHiggs VS. SUSYHD.

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2015/groups/np/compspec.txt · Last modified: 2015/07/14 09:41 by philippe.gras