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Hi all, the track momentum and the neutral energy spectrum are different between data and MC. In http://www.slac.stanford.edu/~daniele/vub/comp1600.ps TRACKS http://www.slac.stanford.edu/~daniele/vub/comp9900.ps NEUTRALS this difference is shown. Taking this difference into account and reweighting the MC (basically taking the numbers from the ratio plot in the bottom of the ps files) on data I got: No reweighting: BRBR :0.0161+-0.0031 Trk reweighting: BRBR :0.0162+-0.0030 Neu reweighting: BRBR :0.0169+-0.0030 Total reweighting: BRBR :0.0172+-0.0029 The difference for the tracking is within the systematics quoted in the BAD. The neutral one is larger (5% instead of 2%). We could use the more conservative 5% for the neutral reconstruction systematics. Daniele