W em easured twom om entsofthelepton m om entum spectrum in B ! X ‘ ,where‘= eor ,for p‘ 1:5 G eV=c. From these we derive the Heavy Q uark Expansion (HQ E)param eters (M S)= 0:39 0:03jstat 0:06jsys 0:12jth G eV and 1 = 0:25 0:02jstat 0:05jsys 0:14jth G eV ,through order 1=M 3 B in the non-perturbative expansion and 0 2 s in the perturbative expansion. The theoreticalexpression needed to extract jVcbjfrom the m easured sem ileptonic width is evaluated using theseHQ E param eters.Com bined with theworld averageofthesem ileptonicwidth,we nd jVcbj= (40:8 0:5j sl 0:4j( 1; )exp 0:9jth) 10 .Finally,theshortrange b-quark m assm 1S b is evaluated and found to be4:82 0:07jexp 0:11jth G eV/c . Subm itted to the 31 InternationalConferenceon High Energy Physics,July 2002,Am sterdam

D. Besson, S. Anderson, V. V. Frolov, D. T. Gong, Y. Kubota, S. Z. Li, R. Poling, A. Smith, C. J. Stepaniak, J. Urheim, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, K. Arms, E. Eckhart, K. K. Gan, C. Gwon, T. K. Pedlar, E. von Toerne, H. Severini, P. Skubic, S. A. Dytman, J. A. Mueller, S. Nam, V. Savinov, J. W. Hinson, G. S. Huang, J. Lee, D. H. Miller, V. Pavlunin, B. Sanghi, E. I. Shibata, I. P. J. Shipsey, D. Cronin-Hennessy, C. S. Park, W. Park, J. B. Thayer, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, R. Stroynowski, M. Artuso, C. Boulahouache, S. Blusk, E. Dambasuren, O. Dorjkhaidav, R. Mountain, H. Muramatsu, R. Nandakumar, T. Skwarnicki, S. Stone, J. C. Wang, A. H. Mahmood, S. E. Csorna, I. Danko, G. Bonvicini, D. Cinabro, M. Dubrovin, S. McGee, A. Bornheim, E. Lipeles, S. P. Pappas, A. Shapiro, W. M. Sun, A. J. Weinstein, R. A. Briere, G. P. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, N. E. Adam, J. P. Alexander, K. Berkelman, V. Boisvert, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, R. S. Galik, L. Gibbons, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, L. Hsu, C. D. Jones, J. Kandaswamy, D. L. Kreinick, A. Magerkurth, H. Mahlke-Kruger, T. O. Meyer, N. B. Mistry, J. R. Patterson, D. Peterson, J. Pivarski, S. J. Richichi, D. Riley, A. J. Sadoff, H. Schwarthoff, M. R. Shepherd, J. G. Thayer, D. Urner, T. Wilksen, A. Warburton, M. Weinberger, S. B. Athar, P. Avery, L. Breva-Newell, V. Potlia, H. Stoeck, J. Yelton, B. I. Eisenstein, G. D. Gollin, I. Karliner, N. Lowrey, C. Plager, C. Sedlack, M. Selen, J. J. Thaler, J. Williams, and K. W. Edwards

We report a measurement of the exclusive B+ meson decay to the D-s(()*K-)(+)pi(+) final state using 657 x 10(6) B (B) over bar pairs collected at the gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We use D-s* -> D-s(-) -> phi pi(-), (K) over bar*(892)K-0(-) and (KSK-)-K-0 decay modes for D-s(()*()) reconstruction and measure the following branching fractions: B(B+ -> Ds-K+pi(+)) = (1.71(-0.07)(+0.08)(stat)(-0.20)(+0.20)(syst) +/- 0.15(B-int)) x 10(-4) and B(B+ -> D-s*K--(+)pi(+)) = (1.31(-0.12)(+0.13)(stat)(-0.25)(+0.25)(syst) +/- 0.12(B-int)) x 10(-4). The uncertainties are due to statistics, experimental systematic errors, and uncertainties of intermediate branching fractions, respectively.

Using the CLEO II detector operating at the CESR ee collider, we have measured the structure functions in the decay τ → πππντ , based on a sample corresponding to 4 × 10 produced τ -pair events. We determine the integrated structure functions, which depend only on the three pion invariant mass, as well as the structure functions differential in the Dalitz plot. We extract model independent limits on non-axial-vector contributions from the measured structure functions as less than 16.6% of the total branching fraction, at the 95% confidence level. Separating the non-axial-vector contributions into scalar and vector contributions, we measure that scalars (vectors) contribute with less than 9.4% (7.3%) to the total branching ratio, at the 95% confidence level. PACS numbers: 13.25.Jx, 13.35.Dx, 14.40.Cs, 14.60.Fg Typeset using REVTEX

A measurement of the spin alignment of charged D mesons produced in continuum ee → cc̄ events at √s = 10.5 GeV is presented. This study using 4.72 fb of CLEO II data shows that there is little evidence of any D spin alignment.

We have searched for the effective FCNC decays b → sl+l− using an inclusive method. We set upper limits on the branching ratios B(b → se+e−) < 5.7 × 10−5, B(b → sμ+μ−) < 5.8 × 10−5, and B(b → seμ) < 2.2 × 10−5 (at 90 % C.L.). Combining the di-electron and di-muon decay modes we find: B(b → sl+l−) < 4.2 × 10−5 (at 90 % C.L.).

We report new measurements of the differential and total branching ratios for inclusive B decay to D, D and D and the first measurement of the same quantities for inclusive B decay to D. Here B is the mixture of Bd and Bu from Υ(4S) decay. Furthermore, since more than one charm particle (or antiparticle) of the same kind can be produced in B decay, here “inclusive B branching ratio” is used to mean the average number of charm particles and their antiparticles of a certain species produced in B decay. We obtain the following results (the first error is statistical, the second systematic of this analysis, the third is propagated from other measurements): B(B → DX) = (0.636 ± 0.014 ± 0.019 ± 0.018),B(B → DX) = (0.235 ± 0.009 ± 0.009 ± 0.024),B(B → DX) = (0.247 ± 0.012 ± 0.018 ± 0.018),B(B → DX) = (0.239 ± 0.011 ± 0.014 ± 0.009). The following ratio of branching ratios is not affected by most of the systematic errors: B(B → DX)/B(B → DX) = (1.03±0.07±0.09±0.08). We also report the first measurement of the momentumdependent D polarization and a new measurement of the D polarization in inclusive B decay. Using these measurements and other CLEO results and making some additional assumptions, we calculate the average number of c and c̄ quarks produced in B decay to be 〈nc〉 = 1.10 ± 0.05.

We describe a measurement of B−B0 mixing parameters exploiting a method of partial reconstruction of the decay chains B → Dπ and B → Dρ. Using 9.6 ×10BB pairs collected at the Cornell Electron Storage Ring, we find χd = 0.198 ± 0.013 ± 0.014, |yd| < 0.41 at 95% confidence level, and |Re(ǫB)| < 0.034 at 95% confidence level.

Using ee annihilation data collected by the CLEO II detector at CESR, we have observed the decay D s → ωπ. This final state may be produced through the annihilation decay of the D s , or through final state interactions. We find a branching ratio of Γ(D s → ωπ)/Γ(D s → ηπ) = 0.16 ± 0.04 ± 0.03, where the first error is statistical and the second is systematic. PACS numbers: 13.25.Ft, 14.40.Lb

The resonant structure of the four pion final state in the decay τ → 3ππντ is analyzed using 4.27 million τ+τ− pairs collected by the CLEO II experiment. We search for second class currents in the decay τ → ωπντ using spin-parity analysis and establish an upper limit on the non-vector current contribution. The mass and width of the ρ resonance are extracted from a fit to the τ → ωπντ spectral function. A partial wave analysis of the resonant structure of the τ → 3ππντ decay is performed; the spectral decomposition of the four pion system is dominated by the ωπ and a1π final states.

We report the first observation of B → ηX transitions with high momentum η mesons. We observe 39.0 ± 11.6 B decay events with 2.0 < pη′ < 2.7 GeV/c, the high momentum region where background from b → c processes is suppressed. We discuss the physical interpretation of the signal, including the possibility that it is due to b → sg transitions. Given that interpretation, we find B(B → ηXs) = (6.2 ± 1.6(stat) ± 1.3(sys) +0.0 −1.5(bkg)) × 10 −4 for 2.0 < pη′ < 2.7 GeV/c. Typeset using REVTEX

We report on a study of exclusive radiative decays of the Υ(1S) resonance collected with the CLEO II detector operating at CESR. We present the first observation of the radiative decays Υ(1S)→ γππ and Υ(1S)→ γππ. For the dipion mass regime mππ >1.0 GeV we obtain B(Υ(1S)→ γπ π)=(6.3 ± 1.2±1.3)×10 and B(Υ(1S)→ γππ)=(1.7±0.6±0.3)×10 . The observed γππ events are consistent with the hypothesis Υ(1S)→ γf2(1270). Typeset using REVTEX

A study of charm fragmentation into D∗+ s and D + s in e +e− annihilations at √ s = 10.5 GeV is presented. This study using 4.72±0.05 fb−1 of CLEO II data reports measurements of the cross-sections σ(D∗+ s ) and σ(D + s ) in momentum regions above x = 0.44, where x is the Ds momentum divided by the maximum kinematically allowed Ds momentum. The Ds vector to vector plus pseudoscalar production ratio is measured to be PV (x(D + s ) > 0.44) = 0.44± 0.04.

Using a sample of 4.7 fb−1 integrated luminosity accumulated with the CLEO II detector at the Cornell Electron Storage Ring (CESR), we investigate the mass spectrum and resonant structure in τ → Kππντ decays. We measure the relative fractions of K1(1270) and K1(1400) resonances in these decays, as well as the K1 masses and widths. Our fitted K1 resonances are somewhat broader than previous hadroproduction measurements, and in agreement with recent LEP results from tau decay. The larger central value of our measured width supports models which attribute the small τ → Kππντ branching fraction to larger K1 widths than are presently tabulated. We also determine the Ka − Kb mixing angle θK . PACS numbers: 13.10+q, 13.35.Dx, 14.40.Aq

We report new measurements of the diierential and total branching ratios for inclusive B decay to D 0 , D + and D + and the rst measurement of the same quantities for inclusive B decay to D 0. Here B is the mixture of B d and Bu from (4S) decay. Furthermore, since more than one charm particle (or antiparticle) of the same kind can be produced in B decay, here \inclusive B branching ratio" is used to mean the average number of charm particles and their antiparticles of a certain species produced in B decay. We obtain the following results (the rst error is statistical, the second systematic of this analysis, the third is propagated from other measurements): B(B ! D 0): We also report the rst measurement of the momentum-dependent D 0 polarization and a new measurement of the D + polarization in inclusive B decay. Using these measurements and other CLEO results and making some additional assumptions, we calculate the average number of c and c quarks produced in B decay to be