S. Behrends
University of Rochester
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by S. Behrends.
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.
Physical Review D | 1986
M. S. Alam; N. Katayama; I. J. Kim; C. R. Sun; V. Tanikella; A. Bean; G. J. Bobbink; I. Brock; A. Engler; T. Ferguson; R.W. Kraemer; C. Rippich; R.B. Sutton; 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
We have measured the inclusive branching ratio for B..-->..psiX to be (1.09 +- 0.16 +- 0.21)%, and the exclusive branching ratios for B/sup -/..-->..psiK/sup -/ and B-bar /sup 0/..-->..psiK-bar /sup *//sup 0/ to be (0.09 +- 0.05)% and (0.41 +- 0.18)%, respectively. The mass difference between neutral and charged B mesons is 1.1 +- 2.1 MeV, while the difference between the mass of UPSILON(4S) and twice the mean B-meson mass is 18.5 +- 3.0 MeV. The psi momentum distribution implies a substantial two-body decay (in agreement with direct measurements), but also some combination of B..-->..psiX with M/sub X/>1.5 GeV, and B..-->..psiX.
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.
Physics Letters B | 1984
S. Behrends; K. Chadwick; J. Chauveau; T. Gentile; Jan M. Guida; Joan A. Guida; A. C. Melissinos; S. L. Olsen; G. Parkhurst; D. Peterson; R. Poling; C. Rosenfeld; E. H. Thorndike; P. Tipton; D. Besson; J. Green; R. G. Hicks; R. Namjoshi; F. Sannes; P. Skubic; A. Snyder; R. Stone; A. Chen; M. Goldberg; N. Horwitz; A. Jawahery; P. Lipari; G. C. Moneti; C. G. Trahern; H. W. van Hecke
Abstract We have searched in the decays of the ϒ(1S), ϒ(2S) and B mesons for the narrow state, γ, seen by the Mark II group in radiative ψ decay. We find the product branching fractions B[ϒ(1S) → γγ]·B[γ → K+K−], B[ϒ(2S) → γ γ]· B[γ → K+K−] and B[B → γX]·B[γ → K+K−] to be less than 2×10−4, 9×10−5 and 3×10−3, respectively at 90% confidence level. These limits constrain theoretical models if the γ is interpreted as a Higgs boson.
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.
