J. D. Lewis
Cornell University
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Featured researches published by J. D. Lewis.
Physics Letters B | 1989
P. Avery; D. Besson; L. Garren; J. Yelton; T. Bowcock; K. Kinoshita; F. M. Pipkin; M. Procario; Richard Wilson; J. Wolinski; D. Xiao; P. Baringer; P. Haas; Ha Lam; A. Jawahery; C. H. Park; D. Perticone; R. Poling; R. Fulton; M. Hempstead; T. Jensen; D. R. Johnson; H. Kagan; R. Kass; F. Morrow; J. Whitmore; W.-Y. Chen; J. Dominick; R. L. McIlwain; David Harry Miller
Abstract We have measured upper limits on branching fractions for rare exclusive decays of B mesons arising from one-loop diagrams in the standard model of electroweak interactions. We also obtain an upper limit for the lepton-number-violating decay B 0 → μ ± e ∓ .
Physics Letters B | 1989
M. S. Alam; N. Katayama; I. J. Kim; W. C. Li; X. C. Lou; C. R. Sun; D. Bortoletto; M. Goldberg; N. Horwitz; M. D. Mestayer; G. C. Moneti; V. Sharma; I. P. J. Shipsey; T. Skwarnicki; S. E. Csorna; T. Letson; I. Brock; T. Ferguson; J. P. Alexander; M. Artuso; C. Bebek; K. Berkelman; D. G. Cassel; E. Cheu; D. M. Coffman; G. Crawford; J. W. DeWire; P. S. Drell; R. Ehrlich; R. S. Galik
Abstract Using the CLEO detector, we present a measurement of the mass of the charged charmed strange baryon Ξ + c and its neutral counterpart the Ξ 0 c . The Ξ + c is observed through its decay to Ξ - π + π + , and its mass is measured to be (2467±3±4) MeV. The isospin mass splitting of the Ξ c system is found to be M ( Ξ + c )- M ( Ξ 0 c )=(−5±4±1)MeV.
Physical Review Letters | 1990
J. P. Alexander; M. Artuso; C. Bebek; K. Berkelman; T. E. Browder; D. G. Cassel; E. Cheu; D. M. Coffman; G. Crawford; J. W. DeWire; P. S. Drell; R. Ehrlich; R. S. Galik; B. Gittelman; S. W. Gray; A. M. Halling; D. L. Hartill; B. K. Heltsley; J. Kandaswamy; N. Katayama; D. L. Kreinick; J. D. Lewis; G. S. Ludwig; N. B. Mistry; J. Mueller; S. Nandi; E. Nordberg; C. Oegrady; D. Peterson; M. Pisharody
Using the CLEO detector at the Cornell Electron Storage Ring (CESR), we have determined the ratio {Gamma}({ital D}{sub {ital s}}{sup +}{r arrow}{phi}{ital l}{sup +}{nu})/{Gamma}({ital D}{sub {ital s}}{sup +} {r arrow}{phi}{pi}{sup +})=0.49{plus minus}0.10{sub {minus}0.14}{sup +0.10}. We use this measurement to derive {ital B}({ital D}{sub {ital s}}{sup +}{r arrow}{phi}{pi}{sup +}).
Physics Letters B | 1990
W.-Y. Chen; R. L. McIlwain; D. H. Miller; C. R. Ng; S. F. Schaffner; E. I. Shibata; W. M. Yao; K. Sparks; E. H. Thorndike; C. H. Wang; M. S. Alam; I. J. Kim; W. C. Li; X. C. Lou; C. R. Sun; P. N. Wang; M. I. Zoeller; D. Bortoletto; M. Goldberg; N. Horwitz; V. Jain; M. D. Mestayer; G. C. Moneti; V. Sharma; I. P. J. Shipsey; T. Skwarnicki; M. Thulasidas; S. E. Csorna; T. Letson; J. P. Alexander
Abstract Using the CLEO detector at the Cornell Electron Storage Ring, we have searched for two-photon production of charmonium in four-track final states. We have measured Γ γγ ( η c )=5.9 +2.1 −1.8 ±1.9 keV, and we have obtained 95% CL upper limits of Γ γγ ( X c 0 ) Γ γγ ( X c 2 )
Physics Letters B | 1989
R. Fulton; P. Haas; M. Hempstead; T. Jensen; D. R. Johnson; H. Kagan; R. Kass; F. Morrow; J. Whitmore; P. Baringer; W.-Y. Chen; R. L. McIlwain; D. H. Miller; C. R. Ng; E. I. Shibata; W. M. Yao; M. S. Alam; D. Chen; N. Katayama; I. J. Kim; W. C. Li; X. C. Lou; C. R. Sun; V. Tanikella; D. Bortoletto; M. Goldberg; N. Horwitz; P. Lubrano; M. D. Mestayer; G. C. Moneti
The branching ratio for inclusive ψ production in ψ(1S) decays is measured to be (0.11 ± 0.04 ± 0.02)%.
Physics Letters B | 1989
W.-Y. Chen; R. L. McIlwain; D. H. Miller; C. R. Ng; E. I. Shibata; W. M. Yao; K. Sparks; E. H. Thorndike; M. S. Alam; N. Katayama; I. J. Kim; W. C. Li; X. C. Lou; C. R. Sun; D. Bortoletto; M. Goldberg; N. Horwitz; P. Lubrano; M. D. Mestayer; G. C. Moneti; V. Sharma; I. P. J. Shipsey; T. Skwarnicki; S. E. Csorna; T. Letson; I.C. Brock; T. Ferguson; J. P. Alexander; M. Artuso; C. Bebek
Abstract Using the CLEO detector, we have measured the branching ratios for the exclusive decays of the D s + meson into K ∗0 K + , K 0 K + , and K ∗+ K 0 relative to the decay D s + →φπ + to be close to unity. We have also measured the mass diference between the D s + and D + meson to be 98.5±1.5 MeV/ c 2 .
Physical Review Letters | 1992
J. P. Alexander; C. Bebek; K. Berkelman; D. Besson; T. E. Browder; D. G. Cassel; E. Cheu; D. M. Coffman; P. S. Drell; R. Ehrlich; R. S. Galik; M. Garcia-Sciveres; B. Geiser; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; K. Honscheid; J. Kandaswamy; N. Katayama; P. Kim; D. L. Kreinick; J. D. Lewis; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; S. Nandi; C. R. Ng; E. Nordberg
Using the CLEO II detector, we have accurately measured {ital D}{sub {ital s}} decay branching ratios relative to the {phi}{pi}{sup +} mode for the {eta}{pi}{sup +} and {eta}{prime}{pi}{sup +} states, for which there are conflicting claims; our results are 0.54{plus minus}0.09{plus minus}0.06 and 1.20{plus minus}0.15{plus minus}0.11, respectively.
Physical Review D | 1992
M. Daoudi; W. T. Ford; D. R. Johnson; K. Lingel; M. Lohner; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; K. Berkelman; D. Besson; T. E. Browder; D. G. Cassel; E. Cheu; D. M. Coffman; P. S. Drell; R. Ehrlich; R. S. Galik; M. Garcia-Sciveres; B. Geiser; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; K. Honscheid; J. Kandaswamy; N. Katayama; P. Kim; D. L. Kreinick; J. D. Lewis
We have made measurements of several {ital D}{sub {ital s}} branching ratios, relative to the {phi}{pi}{sup +} mode. We have observed two previously unseen two-body hadronic decays of the {ital D}{sub {ital s}}{sup +}, namely {eta}{rho}{sup +} and {eta}{prime}{rho}{sup +}, and measured relative branching ratios of 2.86{plus minus}0.38{sub {minus}0.38}{sup +0.36} and 3.44{plus minus}0.62{sub {minus}0.46}{sup +0.44}, respectively. We have determined the relative branching ratio for the decay into {phi}{rho}{sup +} to be 1.86{plus minus}0.26{sub {minus}0.40}{sup +0.29}. In addition, we have measured relative branching ratios for the {eta}{pi}{sup +} and {eta}{prime}{pi}{sup +} states, for which there had previously been conflicting measurements; our results are 0.54{plus minus}0.09{plus minus}0.06 and 1.20{plus minus}0.15{plus minus}0.11, respectively. Combining these new measurements with previous results and using (3.7{plus minus}1.2)% for the value of {ital scrB}({ital D}{sub {ital s}}{r arrow}{phi}{pi}{sup +}), we can account for {approx}(79{plus minus}26)% of all {ital D}{sub {ital s}}{sup +} decays. In addition we have also measured relative branching ratios or set upper limits on {ital D}{sup +} decays to all of the above-mentioned final states.
Physical Review D | 1992
M. Daoudi; W. T. Ford; D. R. Johnson; K. Lingel; M. Lohner; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; K. Berkelman; D. Besson; T. E. Browder; D. G. Cassel; E. Cheu; D. M. Coffman; P. S. Drell; R. Ehrlich; R. S. Galik; M. Garcia-Sciveres; B. Geiser; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; K. Honscheid; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; J. D. Lewis
We have made measurements of several {ital D}{sub {ital s}} branching ratios, relative to the {phi}{pi}{sup +} mode. We have observed two previously unseen two-body hadronic decays of the {ital D}{sub {ital s}}{sup +}, namely {eta}{rho}{sup +} and {eta}{prime}{rho}{sup +}, and measured relative branching ratios of 2.86{plus minus}0.38{sub {minus}0.38}{sup +0.36} and 3.44{plus minus}0.62{sub {minus}0.46}{sup +0.44}, respectively. We have determined the relative branching ratio for the decay into {phi}{rho}{sup +} to be 1.86{plus minus}0.26{sub {minus}0.40}{sup +0.29}. In addition, we have measured relative branching ratios for the {eta}{pi}{sup +} and {eta}{prime}{pi}{sup +} states, for which there had previously been conflicting measurements; our results are 0.54{plus minus}0.09{plus minus}0.06 and 1.20{plus minus}0.15{plus minus}0.11, respectively. Combining these new measurements with previous results and using (3.7{plus minus}1.2)% for the value of {ital scrB}({ital D}{sub {ital s}}{r arrow}{phi}{pi}{sup +}), we can account for {approx}(79{plus minus}26)% of all {ital D}{sub {ital s}}{sup +} decays. In addition we have also measured relative branching ratios or set upper limits on {ital D}{sup +} decays to all of the above-mentioned final states.
Physical Review Letters | 1991
R. J. Morrison; D. Schmidt; M. Procario; D. R. Johnson; K. Lingel; P. Rankin; J. G. Smith; J. P. Alexander; M. Artuso; C. Bebek; K. Berkelman; D. Besson; T. E. Browder; D. G. Cassel; E. Cheu; D. M. Coffman; P. S. Drell; R. Ehrlich; R. S. Galik; M. Garcia-Sciveres; B. Geiser; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; K. Honscheid; J. Kandaswamy; N. Katayama; D. L. Kreinick; J. D. Lewis
Using the CsI calorimeter of the CLEO II detector, the spin triplet {chi}{sub {ital b}}(2{ital P}) states are observed in {Upsilon}(3{ital S}) radiative decays with much higher statistics than seen in previous experiments. The observed mass splittings are not described well by theoretical models, while the relative branching ratios agree with predictions that include relativistic corrections to the radiative transition rates.
