J. Staeck

Investigation of Semileptonic {ital B} Meson Decays to {ital p} -Wave Charm Mesons

We have studied semileptonic B meson decays with a P-wave charm meson in the final state using 3.29 × 10 BB̄ events collected by the CLEO II detector at the Cornell Electron-positron Storage Ring. We find a value for the exclusive semileptonic product branching fraction: B(B− → D 1`ν̄`)B(D 1 → Dπ) = (0.373 ± 0.085 ± 0.052 ± 0.024)% and an upper limit for B(B− → D 2 `ν̄`)B(D 2 → Dπ) < 0.16% (90% C.L.). These results indicate that at least 20% of the total B− semileptonic rate is unaccounted for by the observed exclusive decays, B− → D`ν̄, B− → D`ν̄, B− → D 1`−ν̄, and B− → D 2 `−ν̄. (Submitted to Physical Review Letters) SLAC-PUB-9836 hep-ex/9708035 Work supported in part by Department of Energy Contract DE-AC03-76SF00515 Stanford Linear Accelerator Center, Stanford University, Stanford, CA 94309, USA A. Anastassov, J. E. Duboscq, D. Fujino, K. K. Gan, T. Hart, K. Honscheid, H. Kagan, R. Kass, J. Lee, M. B. Spencer, M. Sung, A. Undrus, R. Wanke, A. Wolf, M. M. Zoeller, B. Nemati, S. J. Richichi, W. R. Ross, P. Skubic, M. Bishai, J. Fast, J. W. Hinson, N. Menon, D. H. Miller, E. I. Shibata, I. P. J. Shipsey, M. Yurko, S. Glenn, S. D. Johnson, Y. Kwon, S. Roberts, E. H. Thorndike, C. P. Jessop, K. Lingel, H. Marsiske, M. L. Perl, V. Savinov, D. Ugolini, R. Wang, X. Zhou, T. E. Coan, V. Fadeyev, I. Korolkov, Y. Maravin, I. Narsky, V. Shelkov, J. Staeck, R. Stroynowski, I. Volobouev, J. Ye, M. Artuso, A. Efimov, M. Goldberg, D. He, S. Kopp, G. C. Moneti, R. Mountain, S. Schuh, T. Skwarnicki, S. Stone, G. Viehhauser, X. Xing, J. Bartelt, S. E. Csorna, V. Jain, K. W. McLean, S. Marka, R. Godang, K. Kinoshita, I. C. Lai, P. Pomianowski, S. Schrenk, G. Bonvicini, D. Cinabro, R. Greene, L. P. Perera, G. J. Zhou, B. Barish, M. Chadha, S. Chan, G. Eigen, J. S. Miller, C. O’Grady, M. Schmidtler, J. Urheim, A. J. Weinstein, F. Würthwein, D. W. Bliss, G. Masek, H. P. Paar, S. Prell, V. Sharma, D. M. Asner, J. Gronberg, T. S. Hill, D. J. Lange, S. Menary, R. J. Morrison, H. N. Nelson, T. K. Nelson, C. Qiao, J. D. Richman, D. Roberts, A. Ryd, M. S. Witherell, R. Balest, B. H. Behrens, W. T. Ford, H. Park, J. Roy, J. G. Smith, J. P. Alexander, C. Bebek, B. E. Berger, K. Berkelman, K. Bloom, D. G. Cassel, H. A. Cho, D. S. Crowcroft, M. Dickson, P. S. Drell, K. M. Ecklund, R. Ehrlich, A. D. Foland, P. Gaidarev, L. Gibbons, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, P. I. Hopman, S. L. Jones, J. Kandaswamy, P. C. Kim, D. L. Kreinick, T. Lee, Y. Liu, N. B. Mistry, C. R. Ng, E. Nordberg, M. Ogg, J. R. Patterson, D. Peterson, D. Riley, A. Soffer, B. Valant-Spaight, C. Ward, M. Athanas, P. Avery, C. D. Jones, M. Lohner, C. Prescott, J. Yelton, J. Zheng, G. Brandenburg, R. A. Briere, A. Ershov, Y. S. Gao, D. Y.-J. Kim, R. Wilson, H. Yamamoto, aPermanent address: Lawrence Livermore National Laboratory, Livermore, CA 94551. bPermanent address: BINP, RU-630090 Novosibirsk, Russia. cPermanent address: Yonsei University, Seoul 120-749, Korea. dPermanent address: Brookhaven National Laboratory, Upton, NY 11973. ePermanent address: University of Texas, Austin TX 78712

Measurement of the Decay Amplitudes and Branching Fractions of {ital B} {r_arrow} {ital J/}{psi}{ital K*} and {ital B} {r_arrow} {ital J/}{psi}{ital K} Decays

Using data taken with the CLEO II detector, we present the first full angular analysis in the color-suppressed modes B{sup 0} {yields} J/{psi} K*{sup 0} and B{sup +} {yields} J/{psi} K*{sup +}. This leads to a complete determination of the decay amplitudes of these modes. In addition, we update the branching fractions for B {yields} J/{psi} K and B {yields} J/{psi} K*.

Search for Inclusive {ital b{r_arrow}sl}{sup + }{ital l}{sup {minus}}

We have searched for the effective FCNC decays b->s l+l- using an inclusive method. We set upper limits on the branching ratios B(b->s e+e-)<5.7 10^{-5}, B(b->s mu+mu-)<5.8 10^{-5}, and B(b->s e+-mu-+)<2.2 10^{-5} (at 90 %\ C.L.). Combining the di-electron and di-muon decay modes we find: B(b->s l+l-)<4.2 10^{-5} (at 90 % C.L.).We have searched for the effective flavor changing neutral-current decays b{r_arrow}sl{sup +}l{sup {minus}} using an inclusive method. We set upper limits on the branching ratios B(b{r_arrow}se{sup +}e{sup {minus}}){lt} 5.7{times}10{sup {minus}5} , B(b{r_arrow}s{mu}{sup +}{mu}{sup {minus}} ){lt}5.8{times}10{sup {minus}5} , and B(b{r_arrow}se{sup {plus_minus}}{mu}{sup {minus_plus} }){lt}2.2{times}10{sup {minus}5} [at 90{percent} confidence level (C.L.)]. Combing the dielectron and dimuon decay modes we find B(b{r_arrow}sl{sup +}l{sup {minus}}){lt} 4.2{times}10{sup {minus}5} (at 90{percent} C.L.). {copyright} {ital 1998} {ital The American Physical Society}

Measurement of the branching fractions of {Lambda}{sub c}{sup +}{r_arrow}p{bar K}n({pi})

Using data recorded by the CLEO-II detector at CESR, we report new measurements of the branching fractions for the decays of the charmed baryon {Lambda}{sub c}{sup +} into pK{sup {minus}}{pi}{sup +}{pi}{sup 0}, p{bar K}{sup 0}, p{bar K}{sup 0}{pi}{sup +}{pi}{sup {minus}}, and p{bar K}{sup 0}{pi}{sup 0}, all measured relative to pK{sup {minus}}{pi}{sup +}. The relative branching fractions are 0.67{plus_minus}0.04{plus_minus}0.11,0.46{plus_minus}0.02{plus_minus}0.04,0.52 {plus_minus}0.04{plus_minus}0.05, and 0.66{plus_minus}0.05{plus_minus}0.07, respectively. {copyright} {ital 1998} {ital The American Physical Society}Using data recorded by the CLEO-II detector at CESR, we report new measurements of the branching fractions for the decays of the charmed baryon

Study of the Decay {ital {tau}}{sup {minus}}{r_arrow}2{ital {pi} }{sup {minus}}{ital {pi}}{sup +} 3{ital {pi}}{sup 0}{ital {nu}}{sub {ital {tau} }}

\Lambda_c^+

{Lambda}{bar {Lambda}} production in two-photon interactions

into

Study of gluon versus quark fragmentation in {Upsilon}{r_arrow}gg{gamma} and e{sup +}e{sup {minus}}{r_arrow}q{bar q}{gamma} events at {radical}(s)=10 GeV

pK^-\pi^+\pi^0

Flavor-Specific Inclusive {ital B} Decays to Charm

,

Search for Inclusive {ital bsl}{sup + }{ital l}⁻

p\bar{K}^0

Measurement of the branching fractions of {sub c}{sup +}p{bar K}n()

,