Hi Sudan, A better option is to ask on the relevant hypernews, which might either be the tau group or MC generators. We cannot get bogged down on this and there must already be someone who knows if/how to do this. Can you please ask ? I would start with the tau group.

In parallel, please try to make progress on tau reconstruction/ identification in the ttbar background sample. We want to identify events that pass our RA2+>=2bjets requirements and that in addition have an identified tau. I don't know if we want to require the DLV. Probably we do want the DLV as well since we are thinking about hadronic tau decays. It would be great to see progress and histograms showing we are making progress on this soon.

Thus, I think you should select our "standard" event sample (Harold's version of "RA2" + DLV +e >=2 bjets). Do this both for the SM (should be all ttbar) and for LM0. Then

1) apply the tau group's algorithm to reconstruct taus.

2) Determine what fraction of the semileptonic ttbar-> events are identified and what other types of events are selected (do we thereby select other types of events than semi-leptonic ttbar->tau).

3) Plot MET for these events and compare it to MET for the entire semileptonic ttbar->tau sample identified from cheat info.

4) Calculate MT for the events with an identified tau, both for the SM (=ttbar) and LM0 events

Since, with DLV applied, these events are in our standard sample, we then may want to veto them, but let's try to get to this stage and then all the main tools we need will be in place.

-- Bill

-- HaroldNguyen - 08-Sep-2010

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