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Hi Urs, I calculated the fractions for the B+ on the DECAY.DEC I got mode BR *10-6 relative BF in kaons total BF in kaons*10-6 pi0 90 0 0 eta 30 0 0 rho0 130 0 0 omega 130 0 0 eta' 60 0 0 a_10 82 0 0 a_20 7 5% 0.35 b_10 48 0 0 a_00 7 10% 0.7 f_0 4 22% 0.8 f'_0 4 7% 0.3 f_1 41 11% 4 f'_1 41 100% 41 h_1 24 0% 0 h'_1 24 100% 24 f_2 4 4.6% 0.2 f'_2 4 87% 0.3 total 730 71 fraction in kaons = 9.7% that is bit lower than what you get. >From your numbers it looks like you are not fitting mes. Since modes with kaons have higher masses, they have higher combinatorics too. Then it is mandatory to subtract the combinatoric background by fitting mes. I think that your BF will go down a bit. Daniele On Fri, 7 Mar 2003, Urs Langenegger wrote: > > Hoi Daniele, > > you are right and I am right and both are wrong -- to some extent. > > There is a big difference between B0 and B+ (some of the heavy > resonances decay exclusively into KKbar states). > > I had forgotten that eta' does contain an admixture of ssbar, so my > strangeness counting (based on the quark content) was wrong on the K > level. I changed this to count kaons (charged, K0S, K0L). We might > argue about whether or not to include acceptance cuts and remove KL. > > http://www.slac.stanford.edu/~ursl/talks/030603/bnu.eps.gz > http://www.slac.stanford.edu/~ursl/talks/030603/bch.eps.gz > > contain the distributions for neutral and charged B. The events with > kaons are composed of the following Xh states: > > B+ B0 > ID #events pdt.table ID #events pdt.table > ==================================== ==================================== > 41 : 778 +/- 27.8927 non-resonant 42 : 690 +/- 26.2679 non-resonant > 115 : 3 +/- 1.73205 a_20 215 : 3 +/- 1.73205 a_2 > 225 : 2 +/- 1.41421 f_2 10211: 2 +/- 1.41421 a_0 > 335 : 16 +/- 4 f'_2 > 10111: 2 +/- 1.41421 a_00 > 10221: 4 +/- 2 f_0 > 10333: 143 +/- 11.9583 h'_1 > 20223: 34 +/- 5.83095 f_1 > 20333: 265 +/- 16.2788 f'_1 > > The fractions I get now are > > Mode B0 B+ > ---------------------------- > resonant 0.2% 14.0% > non resonant 12.1% 13.4% > > These numbers are on the generic hybrid, i.e. they have not been > reweighted to increase the non-resonant b2u component. > > Maybe someone can calculate the B+ on DECAY.DEC? > > > While checking my absolute normalization, I found a rather interesting > effect I would not have expected: In both the hybrid and the > nonresonant b->ulnu MC we have b->clnu decays (not b->ccbarlnu). You > can look at the dump of the generator block of the hybrid and nonr MC > at > > ~ursl/d/hybrid.log.gz > ~ursl/d/nonresonant.log.gz > > This is dumped directly from recoilNtp.cc with dumpOneB() which is > normally commented out... The chains for these files are in > > ~/macros/fsx/vub/VubAnalysis/chains/hybrid > ~/macros/fsx/vub/VubAnalysis/chains/nonresonant > > This is a 0.5% effect for B+ and 1.5% for B0. I suspect that this > might come more easily from the non-resonant generator than ISGW2. > > Cheers, > --U. >