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Hi, I am bit confused by these numbers. Let' take the resonant ones. In the DECAY.DEC we have (B0 for instance): 0.000180 pi+ e- anti-nu_e PHOTOS ISGW2; 0.000260 rho+ e- anti-nu_e PHOTOS ISGW2; 0.000165 a_1+ e- anti-nu_e PHOTOS ISGW2; 0.000102 b_1+ e- anti-nu_e PHOTOS ISGW2; 0.000014 a_0+ e- anti-nu_e PHOTOS ISGW2; 0.000014 a_2+ e- anti-nu_e PHOTOS ISGW2; pi and rho cannot go in kaons. 60% is already gone. This implies that a_1,b_1, ecc.. have to go in the 25% of the cases in kaons. I see: Decay a_1+ 0.4920 rho0 pi+ VVS_PWAVE 1.0 0.0 0.0 0.0 0.0 0.0; 0.5080 rho+ pi0 VVS_PWAVE 1.0 0.0 0.0 0.0 0.0 0.0; Decay b_1+ 0.9984 omega pi+ VVS_PWAVE 1.0 0.0 0.0 0.0 0.0 0.0; 0.0016 pi+ gamma VSP_PWAVE; Decay a_0+ 0.9000 eta pi+ PHSP; 0.1000 anti-K0 K+ PHSP; Decay a_2+ 0.3500 rho0 pi+ TVS_PWAVE 0.0 0.0 1.0 0.0 0.0 0.0; 0.3500 rho+ pi0 TVS_PWAVE 0.0 0.0 1.0 0.0 0.0 0.0; 0.1440 eta pi+ TSS; 0.1050 omega pi+ pi0 PHSP; 0.0480 anti-K0 K+ TSS; 0.0030 pi+ gamma PHSP; Only a_0 and a_2 can contribute. Then it should be 10%*2% + 5%*2% = 0.3% Similar argument for the B+. Then, where does that 10% come from? What am I missing here? Daniele > > Hoi, > > the determination of this involved a bit more than calculating the BF > in DECAY.DEC, since I was interested also in the JETSET ssbar popping > rates for the nonresonant MC. > > In http://www.slac.stanford.edu/~ursl/talks/030603/ssbar.eps.gz you > can find the p* distribution of el and mu in all b2u events (top), in > b2u events without strangeness (middle) and in b2u events with > strangeness (bottom). The left column shows resonant production, the > right column non-resonant. > > In resonant (non-resonant) b2u events the fraction of events with > strangeness is 0.120+/-0.004 (0.162+/-0.003). The error is statistical. > > Cheers, > --U. > > > PS: The different shapes of these spectra ... >