- Clare and Mark have been having another look at electron ID. When Mark looked a few months ago, the default efficiencies looked rather poor due to close brehmsstrahlungs and separated parts of the EM shower so he has been using MC information to cheat since. Now things look much better: using either Pandora defaults or a Kuhl-style simple ID (one cluster matched to one track, with cuts on track isolation and EM vs Hadronic energy) efficiencies above 90% are reached. Further tuning will be done by Bristol MSci students.
- Robervaal has been looking at samples of ZH with Z->ยตยต and H->anything at √s = 230 and 250 GeV (20,000 events in each). He has identified cutting on the Z recoil mass as an extremely promising way of reducing the ZZ background.
- It seems clear that the best way to perform both electron and muon analyses is to identify the leptons and then remove them before jet clustering.
- Victoria has been looking at the B and C-tagging performance in jets. The C-tag does not look very good and probably needs re-tuning. The B/C tag is not relevant for this analysis.
- Hajrah checked the electron ID cuts in the new detector model. The EM/total and E/p cuts need to be changed. This was done in single particle simulations, so she will next check in physics event.
- Mark had some technical problems getting all of his plots on the web and will put them up after the meeting. The basic summary was that the flavour tag likeliness plots look good and we are probably ready to fit the templates, the last step in the analysis chain.
It was decided that we have enough to show in Wednesday's ILD meeting, and that Victoria will put together a talk.
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