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Summary of the Width/Interference meeting
May 4th, 2015, 17:00 - 18:30
Indico link: https://indico.cern.ch/event/389216/
Objective: to start the process in order to establish a common procedure between ATLAS and CMS for H -> WW/ZZ signal and background modeling and interpretation
Some discussion points worth mentioning:
CMS has claimed that mostly H->4l has any significant effect; ATLAS suggested that there is an effect also on H->WW and H->ZZ->2l2q; needs to be checked
Suggestion that for 2HDM at least only the narrow width region is relevant, since large width regions are disfavoured by the existence of a SM-like h
CMS H->4l shape parametrization that was discussed in detail in the talk by Stefano is implemented in RooFit and it will become available to the everyone
Major open points that need to be discussed and followed up:
interference in the bbH production (Frank Krauss expressed interest to have a look)
treatment of h+H interference (has not been included in the CMS analysis; conflicting references; need to be checked by theory experts)
interference is applied only to S currently; need to check whether we need to apply to S+B
connection to the 2HDM benchmarks to be discussed later this month
Conclusion and Action items:
a twiki is going to be prepared to explain the full procedure for the HZZ4l parametrization so that it is possible to be reproduced by anyone. The procedure can then be reviewed by theorists.
it was suggested that this after the review gets to the Yellow Report 4 without an intermediate internal note