J.-M. Levy
Pierre-and-Marie-Curie University
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Featured researches published by J.-M. Levy.
European Physical Journal C | 1985
M. Atkinson; T. J. Axon; D. Barberis; T. J. Brodbeck; G. R. Brookes; J. Bunn; P. Bussey; A. B. Clegg; J. B. Dainton; M. Davenport; B. Dickinson; B. Diekman; A. Donnachie; R.J. Ellison; P. S. Flower; P. J. Flynn; W. Galbraith; K. Heinloth; R. C. W. Henderson; R. E. Hughes-Jones; J. S. Hutton; M. Ibbotson; H.-P. Jakob; M. Jung; B. R. Kumar; J. Laberrigue; G. D. Lafferty; Jenna Lane; J.C. Lassalle; J.-M. Levy
A study of ϕ-meson photoproduction by partially polarized photons of energy 20–40 GeV is reported. The production mechanism is found to conserves-channel helicity and to proceed via natural-parity exchange in thet channel. In the photoproduction of high-massK+K− states with photons of energy 20–70 GeV, there is evidence for an enhancement at a mass of 1.76 GeV with width 0.08 GeV.
European Physical Journal A | 1986
M. Atkinson; T. J. Axon; Dario Barberis; T. J. Brodbeck; G. R. Brookes; J. Bunn; P. Bussey; A. B. Clegg; J. B. Dainton; M. Davenport; B. Dickinson; B. Diekmann; A. Donnachie; R.J. Ellison; P. S. Flower; P. J. Flynn; W. Galbraith; K. Heinloth; R. C. W. Henderson; R. E. Hughes-Jones; J. S. Hutton; M. Ibbotson; H.-P. Jakob; M. Jung; B. R. Kumar; J. Laberrigue; G. D. Lafferty; Jenna Lane; J.C. Lassalle; J.-M. Levy
In diffractive photoproduction ofηπ+π−, the two-body substatesηρ0 andA2π are found to contribute significantly to the cross-section forηπ+π− masses below 2.4 GeV. From a spin-parity analysis the branching ratio, ρ′(1600)→ηρ/ρ′(1600)→, is determined to be <0.02 at the 68.3% confidence level. TheA2π component shows an enhancement around 1.7 GeV. The spin-parity analysis indicates a probable contribution to this signal from exclusive photoproduction of theg(1690).
European Physical Journal C | 1985
M. Atkinson; T. J. Axon; D. Barberis; T. J. Brodbeck; G. R. Brookes; J. Bunn; P. Bussey; A. B. Clegg; J. B. Dainton; M. Davenport; B. Dickinson; B. Diekmann; A. Donnachie; R.J. Ellison; P. S. Flower; P. J. Flynn; W. Galbraith; K. Heinloth; R. C. W. Henderson; R. E. Hughes-Jones; J. S. Hutton; M. Ibbotson; H.-P. Jakob; M. Jung; B. R. Kumar; J. Laberrigue; G. D. Lafferty; Jenna Lane; J.C. Lassalle; J.-M. Levy
The photoproduction of the final state ω π+π−π0 has been studied as part of a survey of photoproduction in the energy range 20–70 GeV in the Omega spectrometer at CERN. The π+π−π0 system produced with the ω meson has a strongρ±π± component which is predominantlyI=1 andJπ=1+. For theωρ±π∓ state a spin-parity analysis favoursJπ=1−, and the mass spectrum peaks at 2.28±0.05 GeV. The fitted width is Γ=0.44±0.11 GeV. The photoproduction cross-section of theωρ±π∓ state, averaged over the energy range 25–60 GeV, is 150±50 nb.
European Physical Journal C | 1986
M. Atkinson; T. J. Axon; Dario Barberis; T. J. Brodbeck; G. R. Brookes; J. Bunn; P. Bussey; A. B. Clegg; J. B. Dainton; M. Davenport; B. Dickinson; B. Diekmann; A. Donnachie; R.J. Ellison; P. S. Flower; P. J. Flynn; W. Galbraith; K. Heinloth; R. C. W. Henderson; R. E. Hughes-Jones; J. S. Hutton; M. Ibbotson; H.-P. Jakob; M. Jung; B. R. Kumar; J. Laberrigue; G. D. Lafferty; Jenna Lane; J.C. Lassalle; J.-M. Levy
AbstractInclusive photoproduction of ϕ,K*0(890),n
Nuclear Physics | 1979
M. Corden; G.F. Cox; D.P. Kelsey; C.A. Lawrence; P. M. Watkins; O. Hamon; J. Le Guyader; J.-M. Levy; G.W. London
European Physical Journal C | 1987
M. Atkinson; T. J. Axon; Dario Barberis; T. J. Brodbeck; G. R. Brookes; J. Bunn; P. Bussey; Andrew B. Clegg; J. B. Dainton; M. Davenport; B. Dickinson; B. Diekmann; A. Donnachie; R.J. Ellison; P. Flower; P. J. Flynn; W. Galbraith; K. Heinloth; R. C. W. Henderson; R. E. Hughes-Jones; J. S. Hutton; M. Ibbotson; H.-P. Jakob; M. Jung; B. R. Kumar; J. Laberrigue; George Lafferty; Jenna Lane; J.C. Lassalle; J.-M. Levy
bar K*^0
European Physical Journal C | 1984
M. Atkinson; T. J. Axon; D. Barberis; T. J. Brodbeck; G. R. Brookes; J. Bunn; P. Bussey; Andrew B. Clegg; B. Dainton; M. Davenport; B. Dickinson; B. Diekmann; A. Donnachie; R.J. Ellison; P. S. Flower; P. J. Flynn; W. Galbraith; K. Heinloth; R. C. W. Henderson; R. E. Hughes-Jones; J. S. Hutton; M. Ibbotson; H.-P. Jakob; M. Jung; M.A.R. Kemp; B. R. Kumar; J. Laberrigue; George Lafferty; Jenna Lane; J.C. Lassalle
European Physical Journal A | 1988
M. Atkinson; T. J. Axon; Dario Barberis; T. J. Brodbeck; G. R. Brookes; J. Bunn; P. Bussey; A. B. Clegg; J. B. Dainton; M. Davenport; B. Dickinson; B. Diekmann; A. Donnachie; R.J. Ellison; P. S. Flower; P. J. Flynn; W. Galbraith; K. Heinloth; R. C. W. Henderson; R. E. Hughes-Jones; J. S. Hutton; M. Ibbotson; H.-P. Jakob; M. Jung; B. R. Kumar; J. Laberrigue; G. D. Lafferty; Jenna Lane; J.C. Lassalle; J.-M. Levy
n andK*0(1420),n
European Physical Journal C | 1986
M. Atkinson; T. J. Axon; D. Barberis; T. J. Brodbeck; G. R. Brookes; J. Bunn; P. Bussey; A. B. Clegg; J. B. Dainton; M. Davenport; B. Dickinson; B. Diekmann; A. Donnachie; R.J. Ellison; P. S. Flower; P. J. Flynn; W. Galbraith; K. Heinloth; R. C. W. Henderson; R. E. Hughes-Jones; J. S. Hutton; M. Ibbotson; H.-P. Jakob; M. Jung; B. R. Kumar; J. Laberrigue; G. D. Lafferty; Jenna Lane; J.C. Lassalle; J.-M. Levy
European Physical Journal C | 1985
M. Atkinson; T. J. Axon; D. Barberis; T. J. Brodbeck; G. R. Brookes; J. Bunn; P. Bussey; A. B. Clegg; J. B. Dainton; M. Davenport; B. Dickinson; B. Diekmann; A. Donnachie; R.J. Ellison; P. S. Flower; P. J. Flynn; W. Galbraith; K. Heinloth; R. C. W. Henderson; R. E. Hughes-Jones; J. S. Hutton; M. Ibbotson; H.-P. Jakob; M. Jung; B. R. Kumar; J. Laberrigue; G. D. Lafferty; Jenna Lane; J.C. Lassalle; J.-M. Levy
bar K*^0
