Les Houches

Giacomo Cacciapaglia, Thomas Flacke, Devdatta Majumder, Aldo Deandrea, Andrey Katz, Jose Miguel No, Alberto Parolini, Felix Yu, Aurelio Juste, Benjamin Fuks, Alexandra Oliviera

- contamination of the SM single-Higgs searches by Exotic production (1404.2924)

- classification of Exotic production mechanisms (proposal by Felix Yu):

• Resonant

• Non Resonant (cascade decays):
  • asymmetric
  • symmetric

- list of exotic productions (pair and single):

• VLQ pair production: QQ → h j h j (1312.5316)
  • Setting up a toy analysis:
  • (Alexandra) in the 4b final state we could try an “scale invariant” analysis to this channel to discover where it starts to look like with X>HH>4b because the T' boost (inspired by http://arxiv.org/abs/1303.6636)

• VL lepton pp: LL → h l h l, h l h nu, h nu h nu
• …

- Resonance h X: what still needs to be done?

• h l
• h gamma
• h V broad resonance

- Double-higgs production from di-quarks de-excitations into the lighter states. Possible issues

• direct constraints (quite strong for triplets, mild for sextets)
• competition between Q*→Qh and Q*→QZ (depends on the mixing angle)
• indirect constraints from ggH coupling (can be really strong for sextets)
• non-colored di-quarks (couplings to Qd and Qu)?
• full list of scalar colored di-quarks http://arxiv.org/pdf/1105.3161.pdf

- Double-Higgs production via loops of heavy states

A single up-type VLQ that couples uniquely to the Higgs and an up or charm (up-type are theoretically preferred 1102.1987).

Interesting channels for double-Higgs production:

- Pair production: QQ → hj hj

- single production: q g → Q h → hj h

- t-channel exchange: q q → h h

- loop contribution (box diagram): g g → h h

Pair production cross section at 8 TeV (from 1111.5869):

Some references: 1302.0270, 1312.5316.

The model consists on two coloured scalars, that couple to each other via a Higgs. The lightest one decays in di-jets (or jet-lepton).

- pair production of phi2 → [h phi1] or [jj/jl]: final states: hjj jj, hjj hjj / hjl jl, hjl hjl

- constraints from ggf

- bounds from pair di-jet resonances or leptoquark searches

xsecsscalar.pdf

NLO production cross section for a scalar colour triplet (solid) and a “slepton” (dashed) at 8TeV (red) and 13TeV (blue), (coloured from 1412.5589, slepton from 1310.2621).

Bounds from hh → bbgg, and di-jet pair resonances, on a scalar triplet decaying into hjj and jj

LEFT: NLO production cross section at 8 TeV for a scalar triplet (from 1412.5589).

RIGHT: exclusion from (RED) ALTAS hh→bbgg (1406.5053), and (BLUE) CMS di-jet pair resonant search (1412.7706), as a function of the mass of the scalar triplet and the BR(hjj). BR(jj) = 1-BR(hjj).

Bounds from hh→multilepton searches

http://arxiv.org/pdf/1410.2751.pdf

discussion of 16/6/15

discussion of 18/6/15