R. Clare
Stanford University
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Featured researches published by R. Clare.
European Physical Journal C | 1989
K. Wachs; D. Antreasyan; H. W. Bartels; Ch. Bieler; J. K. Bienlein; A. Bizzeti; E. D. Bloom; K. Brockmüller; A.M. Cartacci; M. Cavalli-Sforza; R. Clare; A. Compagnucci; G. Conforto; S. Cooper; D. Coyne; G. Drews; K. Fairfield; G. Folger; A. Fridman; D. Gelphman; G. Glaser; G. Godfrey; K. Graaf; F. H. Heimlich; F.-H. Heinsius; R. Hofstadter; J. Irion; Z. Jakubowski; K. Karch; S. Keh
The Crystal Ball Collaboration has measured the energy spectrum of electrons from semileptonicB meson decays at thee+e− storage ring DORIS II. Branching ratios and weak mixing angles of the Kobayashi-Maskawa matrix are determined using several models for the hadronic matrix elements. We obtain the branching ratio for semileptonic.B decays to charmed states BR(B→evXc)=(11.7±0.4±1.0)%. Our result for the corresponding Kobayashi-Maskawa matrix element is |Vcb|=0.052±0.006. The model dependence of both results is included in the error. We have not observed semileptonicB decays to non-charmed mesons. Analyzing the measured electron spectrum above 2.4 GeV, where nob→c decays contribute, we find BR(B→evXu)/BR(B→evXc)<6.5% at the 90% confidence level. This corresponds to an upper limit |Vub/Vcb|<0.21.
European Physical Journal C | 1988
Z. Jakubowski; D. Antreasyan; H. W. Bartels; D. Besset; Ch. Bieler; J. K. Bienlein; A. Bizzeti; E. D. Bloom; I. Brock; K. Brockmüller; R. Cabenda; A.M. Cartacci; M. Cavalli-Sforza; R. Clare; A. Compagnucci; G. Conforto; R. Cowan; D. Coyne; G. Drews; A. Engler; K. Fairfield; G. Folger; A. Fridman; J. Gaiser; D. Gelphman; G. Glaser; G. Godfrey; K. Graaf; F. H. Heimlich; F. H. Heinsius
AbstractUsing the Crystal Ball detector operating at the DORIS II storage ring we have measured the leptonic partial widthsГee of the Υ(1S) and Υ(2S) resonances. We find
Physics Letters B | 1990
D. Antreasyan; H. W. Bartels; D. Besset; Ch. Bieler; J. K. Bienlein; A. Bizzeti; E. D. Bloom; I. Brock; K. Brockmüller; R. Cabenda; A.M. Cartacci; M. Cavalli-Sforza; R. Clare; A. Compagnucci; G. Conforto; S. Cooper; R. Cowan; D. Coyne; A. Engler; K. Fairfield; G. Folger; A. Fridman; D. Gaiser; D. Gelphman; G. Glaser; G. Godfrey; K. Graaf; F. H. Heimlich; F.-H. Heinsius; R. Hofstadter
Physics Letters B | 1988
S. Keh; D. Antreasyan; H. W. Bartels; D. Besset; Ch. Bieler; J. K. Bienlein; A. Bizzeti; E. D. Bloom; I. Brock; K. Brockmüller; R. Cabenda; A.M. Cartacci; M. Cavalli-Sforza; R. Clare; A. Compagnucci; G. Conforto; S. Cooper; R. Cowan; D. Coyne; A. Engler; K. Fairfield; G. Folger; A. Fridman; J. Gaiser; D. Gelphman; G. Glaser; G. Godfrey; K. Graaf; F. H. Heimlich; F.-H. Heinsius
\Gamma _{ee} (\Upsilon (1S)) = 1.34 \pm 0.03 \pm 0.06keV
European Physical Journal A | 1988
Z. Jakubowski; C. Peck; H. Marsiske; A. Engler; A. C. König; F. H. Heimlich; P. Zschorsch; G. Drews; U. Strohbusch; D. Sievers; R.W. Kraemer; K. Wachs; C. Pegel; H. Kilian; R.T. Van de Walle; T. Kiel; B. Niczyporuk; J. Tompkins; B. van Uitert; K. Fairfield; R. Cowan; H. W. Bartels; F. Messing; G. Glaser; F. C. Porter; G. Conforto; P. Schmitt; S. Lowe; Daniel Marlow; K. Graaf
Physics Letters B | 1989
H. Janssen; D. Antreasyan; H. W. Bartels; D. Besset; Ch. Bieler; J. K. Bienlein; A. Bizzeti; E. D. Bloom; I. Brock; K. Brockmüller; R. Cabenda; A.M. Cartacci; M. Cavalli-Sforza; R. Clare; A. Compagnucci; G. Conforto; S. Cooper; R. Cowan; D. Coyne; A. Engler; K. Fairfield; G. Folger; A. Fridman; J. Gaiser; D. Gelphman; G. Glaser; G. Godfrey; K. Graaf; F. H. Heimlich; F.-H. Heinsius
and
European Physical Journal C | 1988
P. Schmitt; D. Antreasyan; H. W. Bartels; D. Besset; Ch. Bieler; J. K. Bienlein; A. Bizzeti; E. D. Bloom; I. Brock; K. Brockmüller; R. Cabenda; A.M. Cartacci; M. Cavalli-Sforza; R. Clare; A. Compagnucci; G. Conforto; S. Cooper; R. Cowan; D. Coyne; A. Engler; K. Fairfield; G. Folger; A. Fridman; J. Gaiser; D. Gelphman; G. Glaser; G. Godfrey; F. H. Heimlich; R. Hofstadter; J. Irion
European Physical Journal C | 1990
D. Antreasyan; H. W. Bartels; Ch. Bieler; J. K. Bienlein; A. Bizzeti; E. D. Bloom; K. Brockmüller; A.M. Cartacci; M. Cavalli-Sforza; R. Clare; A. Compagnucci; G. Conforto; S. Cooper; D. Coyne; K. Fairfield; G. Folger; A. Fridman; D. Gelphman; G. Glaser; G. Godfrey; K. Graaf; F. H. Heimlich; F.-H. Heinsius; R. Hofstadter; J. Irion; Z. Jakubowski; H. Janssen; K. Karch; S. Keh; T. Kiel
\Gamma _{ee} (\Upsilon (2S)) = 0.56 \pm 0.04 \pm 0.02keV.
European Physical Journal C | 1990
W. Maschmann; D. Antreasyan; H. W. Bartels; D. Besset; Ch. Bieler; J. K. Bienlein; A. Bizzeti; E. D. Bloom; I. Brock; K. Brockmüller; R. Cabenda; A.M. Cartacci; M. Cavalli-Sforza; R. Clare; A. Compagnucci; G. Conforto; S. Cooper; R. Cowan; D. Coyne; A. Engler; K. Fairfield; G. Folger; A. Fridman; J. Gaiser; D. Gelphman; G. Glaser; G. Godfrey; K. Graaf; F. H. Heimlich; F.-H. Heinsius
European Physical Journal C | 1990
D. Antreasyan; H. W. Bartels; D. Besset; Ch. Bieler; J. K. Bienlein; Andrea Bizzeti; E. D. Bloom; I. Brock; K. Brockmüller; R. Cabenda; A.M. Cartacci; M. Cavalli-Sforza; R. Clare; A. Compagnucci; G. Conforto; S. Cooper; R. Cowan; D. Coyne; A. Engler; K. Fairfield; G. Folger; A. Fridman; J. Gaiser; D. Gelphman; G. Glaser; G. Godfrey; K. Graaf; F. H. Heimlich; F.-H. Heinsius; R. Hofstadter
The effect onГee of applying different prescriptions for radiative corrections is discussed. We also measureR, the ratio of non-resonant hadronic cross section to the Born cross section of μ pair production, at c.m. energyW=9.39 GeV to beR=3.48±0.04±0.16.
