You say you want to be loose on the leptons ID/Iso requirements. How do you therefore deal with the triggers ?

You demonstrate that the background is negligible at the end. Why don't you loosen one of the legs in order to gain signal ?

Calorimeter Isolation (especially ECAL) is very sensible to pile-up and could cause efficiency loss on the signal. Drell-Yann group has shown that they could use track-iso only. Why don't you do the same ?

We have ECAL crystals up to eta~3. We paid for them Why don't you look for electromagnetic objects in this region in order to gain some signal acceptance ? We need to beat ATLAS !!!!

(Andrey's special): You cut on the sum of relative isolations. But you measure efficiency on single leptons. How do you therefore control the efficiency of the sum ??

-- ChristopheOchando - 12-Jul-2011