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Hi all, I checked the number of neutrals that are identified as true KLs and whose energy is rescaled by ~20%. On: - cocktail MC - recoil neutrals - b->clnu events I got that the ~3% of the neutral deposits passing our quality cuts is associated to true KLs. The number of events with KL's is ~25% of the total. The KL "efficiency" is ~25% and it is not due to MC matching but entirely due to our quality cuts on the single neutral. If I try to count before the cuts on the single neutral deposit the KL efficiency is ~95%. Then the message is: it looks like we are applying the correction to the right number of Kl's but they rapresent only the 3% of the neutral deposits. Alessio, are these numbers similar to yours? assume that I am not applying any event-based cut. Daniele