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WG2: CP violation in ttH interactions
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Europe/Zurich
CERN
CERN
Videoconference
LHCHWG2 meeting
- Zoom Meeting ID
- 69232720461
- Host
- Giacomo Ortona
- Alternative hosts
- Ken Mimasu, Sarah Heim
- Useful links
- Join via phone
- Zoom URL
-
Activity 1
Including interference in the multivariate analysis, which only includes pure CP-odd vs. CP-even so far.
- Similar methodology to https://arxiv.org/abs/2309.03146 but for ttH?
- More realistic? Inclusion of backgrounds?
- Parametrised classifier, use reweighting?
We need some participation from experimentalists! Follow up with Haichen for possible experimental involvement
TODO:
Sample generation:
- Large sample of ttH events with modified yukawas
- Use reweighting to parametrise coupling dependence?
Activity 2
More global analyses including, e.g., gg -> H(+nj), to analyse complementarity and overlaps between CPV and CPC effects
See CMS study:
https://inspirehep.net/literature/1860903
https://inspirehep.net/literature/2688930
- Mini CPV fit: combining e.g. ggH and ttH with ( k_t, \tilde{k}_t, c_g & \tilde{c}_g )
- First approximation, VBF is SM-like
- Medium term: include the dipole
- Dipole: g t tbar & g t tbar h (old pheno study for dipole https://arxiv.org/pdf/1412.6654.pdf). Are there exp studies on this?
- Higgs CP at ATLAS+CMS https://indico.cern.ch/event/1184945/contributions/5408275/
- Also some studies using 4tops seem to exist, need to look for them
- Maybe just use STXS + some CP-sensitive binnings for ggF
- What to use for ttH?
- What about tH
TODO:
Read exp literature to see what it has actually been done and what's still uncovered or can be improved
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