T. Copie
Cornell University
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Publication
Featured researches published by T. Copie.
Physics Letters B | 1987
P. Avery; D. Besson; T. J. V. Bowcock; R. T. Giles; J. F. Hassard; K. Kinoshita; F. M. Pipkin; Richard Wilson; J. Wolinski; Di Xiao; Thomas R. Gentile; P. Haas; M. Hempstead; T. Jensen; H. Kagan; R. Kass; S. Behrends; Jan M. Guida; Joan A. Guida; F. Morrow; R. Poling; E. H. Thorndike; P. Tipton; M. S. Alam; N. Katayama; I. J. Kim; C. R. Sun; V. Tanikella; D. Bortoletto; A. Chen
Abstract We have set upper limits for rare exclusive decays of B mesons arising from higher order processes in the standard model of electroweak interactions. Such decays may occur via “penguin diagrams” in B decay. We also set an upper limit on a lepton-number-violating decay mode of the neutral B meson.
Physics Letters B | 1987
C. Bebek; K. Berkelman; E. Blucher; D. G. Cassel; T. Copie; R. DeSalvo; J. W. DeWire; R. Ehrlich; R. S. Galik; M. Gilchriese; B. Gittelman; S. W. Gray; A. M. Halling; D. L. Hartill; B. K. Heltsley; S. Holzner; J. Kandaswamy; R. Kowalewski; D. L. Kreinick; Y. Kubota; N. B. Mistry; J. Mueller; R. Namjoshi; E. Nordberg; D. Perticone; D. Peterson; M. Pisharody; K. Read; D. Riley; A. Silverman
The tau lepton lifetime is measured using four different methods with the DELPHI detector. Three measurements using one prong decays are combined, accounting for correlations, resulting in ττ=298 ±7 (stat.)±4 (syst.) fs while the decay length distribution of three prong decays gives ππ=298±13 (stat)±(syst.) fs. The combined result is ττ=298±7 fs. The ratio of the Fermi coupling constant from tau decay relative to that from muon decay is found to be 0.985±0.013, compatible with lepton universality.
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 | 1986
P. Haas; M. Hempstead; T. Jensen; H. Kagan; R. Kass; S. Behrends; Thomas R. Gentile; Jan M. Guida; Joan A. Guida; F. Morrow; R. Poling; C. Rosenfeld; E. H. Thorndike; P. Tipton; J. Green; R. Namjoshi; F. Sannes; R. Stone; M. S. Alam; N. Katayama; I. J. Kim; C. R. Sun; Tanikella; D. Bortoletto; A. Chen; L. Garren; M. Goldberg; N. Horwitz; A. Jawahery; P. Lubrano
We present evidence for inclusive F-italic-meson production in B-italic-meson decay. The product branching fraction B-italic(B-italic..-->..F-italicX-italic)B-italic(F-italic/sup +/..-->..phi..pi../sup +/) is measured to be 0.0038 +- 0.010. The F-italic momentum spectrum indicates the presence of a large component of two-body final states in the decay B-italic..-->..F-italicX-italic.
Physics Letters B | 1987
S. E. Csorna; M. D. Mestayer; R. S. Panvini; G. B. Word; A. Bean; G.J. Bobbink; I. Brock; A. Engler; T. Ferguson; R.W. Kraemer; C. Rippich; H. Vogel; C. Bebek; K. Berkelman; E. Blucher; D. G. Cassel; T. Copie; R. DeSalvo; J. W. DeWire; R. Ehrlich; R. S. Galik; M. Gilchriese; B. Gittelman; S. W. Gray; A. M. Halling; D. L. Hartill; B. K. Heltsley; S. Holzner; M. Ito; J. Kandaswamy
Abstract We have measured the lifetimes of the D0, D+ and Ds+ mesons with data from the CLEO detector. We find τD0 = (5.0 ± 0.7 ± 0.4) × 10−13s, τD+ = (11.4 ± 1.6 ± 0.7) × 10−13s and τDs+ = (4.7 ± 2.2 ± 0.5) × 10−13s, giving lifetime ratios τD+/τD0 = 2.3 ± 0.5 and τDs+/τD0 = 0.9 ± 0.5.
Physical Review Letters | 1987
P. Baringer; R. L. McIlwain; D. H. Miller; E. I. Shibata; S. Behrends; Jan M. Guida; Joan A. Guida; F. Morrow; R. Poling; E. H. Thorndike; P. Tipton; M. S. Alam; N. Katayama; I. J. Kim; Wei Li; X. C. Lou; C. R. Sun; V. Tanikella; D. Bortoletto; M. Goldberg; R. Holmes; N. Horwitz; A. Jawahery; P. Lubrano; G. C. Moneti; V. Sharma; I. P. J. Shipsey; P. Thoma; S. E. Csorna; T. Letson
The production of eta and ..omega.. mesons in tau decay has been studied with the CLEO detector. A sample of 42 000 e/sup +/e/sup -/..-->..tau/sup +/tau/sup -/ events at a mean ..sqrt..s of 10.5 GeV is used in the analysis. The branching ratio B(tau/sup -/..--> omega pi../sup -/..nu../sub tau/) is measured to be (1.60 +- 0.27 +- 0.41)%. No signal for eta production from tau decay is observed, resulting in 95%-confidence-level upper limits of 1.8% for B(tau/sup -/..-->..eta..pi../sup -/..nu../sub tau/), 2.1% for B(tau/sup -/..-->..eta..pi../sup -/..pi../sup 0/..nu../sub tau/), and 2.1% for inclusive eta production in tau decay. No evidence is found for decays proceeding via second-class currents.
Physical Review Letters | 1986
P. Haas; M. Hempstead; T. Jensen; H. Kagan; R. Kass; S. Behrends; Thomas R. Gentile; Jan M. Guida; Joan A. Guida; F. Morrow; R. Poling; C. Rosenfeld; E. H. Thorndike; P. Tipton; J. Green; R. Namjoshi; F. Sannes; R. Stone; M. S. Alam; N. Katayama; I. J. Kim; C. R. Sun; V. Tanikella; D. Bortoletto; A. Chen; L. Garren; M. Goldberg; N. Horwitz; A. Jawahery; P. Lubrano
We present evidence for inclusive F-italic-meson production in B-italic-meson decay. The product branching fraction B-italic(B-italic..-->..F-italicX-italic)B-italic(F-italic/sup +/..-->..phi..pi../sup +/) is measured to be 0.0038 +- 0.010. The F-italic momentum spectrum indicates the presence of a large component of two-body final states in the decay B-italic..-->..F-italicX-italic.
Physical Review Letters | 1986
P. Haas; M. Hempstead; T. Jensen; H. Kagan; R. Kass; S. Behrends; T. Gentile; Jan M. Guida; Joan A. Guida; F. Morrow; R. Poling; C. Rosenfeld; E. H. Thorndike; P. Tipton; J. Green; R. Namjoshi; F. Sannes; R. Stone; M. S. Alam; N. Katayama; I. J. Kim; C. R. Sun; V. Tanikella; D. Bortoletto; A. Chen; L. Garren; M. Goldberg; N. Horwitz; A. Jawahery; P. Lubrano
We present evidence for inclusive F-italic-meson production in B-italic-meson decay. The product branching fraction B-italic(B-italic..-->..F-italicX-italic)B-italic(F-italic/sup +/..-->..phi..pi../sup +/) is measured to be 0.0038 +- 0.010. The F-italic momentum spectrum indicates the presence of a large component of two-body final states in the decay B-italic..-->..F-italicX-italic.
Physical Review Letters | 1986
P. Haas; M. Hempstead; T. Jensen; H. Kagan; R. Kass; S. Behrends; Thomas R. Gentile; Jan M. Guida; Joan A. Guida; F. Morrow; R. Poling; C. Rosenfeld; E. H. Thorndike; P. Tipton; J. Green; R. Namjoshi; F. Sannes; R. Stone; Alam; N. Katayama; I. J. Kim; C. R. Sun; V. Tanikella; D. Bortoletto; A. Chen; L. Garren; M. Goldberg; N. Horwitz; A. Jawahery; P. Lubrano
We present evidence for inclusive F-italic-meson production in B-italic-meson decay. The product branching fraction B-italic(B-italic..-->..F-italicX-italic)B-italic(F-italic/sup +/..-->..phi..pi../sup +/) is measured to be 0.0038 +- 0.010. The F-italic momentum spectrum indicates the presence of a large component of two-body final states in the decay B-italic..-->..F-italicX-italic.
Physical Review Letters | 1986
P. Haas; E. Nordberg; A. Silverman; Alam; Thomas R. Gentile; D. G. Cassel; J. Mueller; Masaharu Ito; Xia Yi; F. Morrow; G. J. Bobbink; R. DeSalvo; I. J. Kim; A. Engler; V. Tanikella; K. Kinoshita; M. Ogg; M. Hempstead; R. Poling; A. M. Halling; D. L. Hartill; H. Kagan; E. H. Thorndike; A. Jawahery; D. Bortoletto; B. K. Heltsley; S. Behrends; M. Gilchriese; Nari B. Mistry; S. Holzner
We present evidence for inclusive F-italic-meson production in B-italic-meson decay. The product branching fraction B-italic(B-italic..-->..F-italicX-italic)B-italic(F-italic/sup +/..-->..phi..pi../sup +/) is measured to be 0.0038 +- 0.010. The F-italic momentum spectrum indicates the presence of a large component of two-body final states in the decay B-italic..-->..F-italicX-italic.
