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24 results on '"J. C., Kluyver"'

1. Differential cross sections and analysing powers for pbar-p -> pi-pi+ and K−K+ from 360 to 1550 MeV/c

Author

A. Hasan, D. V. Bugg, J. R. Hall, R. L. Shypit, F. Tessarotto, A. Penzo, A. Villari, S. Degli Agosti, E. Heer, C. Lechanoine Leluc, Y. Onel, D. Rapin, R. Kunne, K. Bos, J. C. Kluyver, L. Linssen, A. S. Clough, BIRSA, RENATO, BRADAMANTE, FRANCO, DALLA TORRE, SILVIA, MARTIN, ANNA, SCHIAVON, PAOLO, A., Hasan, D. V., Bugg, J. R., Hall, R. L., Shypit, F., Tessarotto, Birsa, Renato, Bradamante, Franco, DALLA TORRE, Silvia, Martin, Anna, A., Penzo, Schiavon, Paolo, A., Villari, S., Degli Agosti, E., Heer, C., Lechanoine Leluc, Y., Onel, D., Rapin, R., Kunne, K., Bo, J. C., Kluyver, L., Linssen, and A. S., Clough

Subjects
differential cross-section and analysing power, LEAR, pbar p annihilation
Published
1992

3. Is theS-meson a baryonium state?

Author

J. C. Kluyver

Subjects
Diquark, Physics, Quark, Particle physics, Physics and Astronomy (miscellaneous), Meson, Isospin, Nuclear Theory, High Energy Physics::Phenomenology, High Energy Physics::Experiment, State (functional analysis), Engineering (miscellaneous), Bar (unit)
Abstract

If theS-meson is assumed to be a baryonium state composed of an isospin one diquark and antidiquark, it will be produced in\(\bar pp\) reactions as a mixture ofI=0 andI=1 baryonium states. The experimentally observed large ratio of the cross sections of the reactions\(\bar pp \to S \to \bar pp\) and\(\bar pp \to S^0 \to \bar nn\) is then explained on basis of quark additivity and conservation of isospin in thes-channel. The model predicts:\(\sigma (\bar pp \to S^0 \to \bar pp):\sigma (\bar pp \to S^0 \to \bar nn):\sigma (\bar pn \to S^ - \to \bar pn) = 25:1:16\).

Published
1979
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4. The determination of isotope ratios by infrared gas analysis

Author

J. C. Kluyver

Subjects
Spectrum analyzer, Isotope, Infrared, Stable isotope ratio, Abundance (ecology), Chemistry, Inorganic chemistry, Analytical chemistry, Infrared spectroscopy, Gas analysis, General Chemistry, Spectral line
Abstract

A new method is described for the determination of the abundance ratios of stable isotopes. The method is based on the difference in the infrared absorption spectra of isotopic molecules. The infrared isotope analyzer developed is a relatively simple instrument and succeeds in the measurement of the C13 abundance in 20 mg of CO2 with an error of 0.005 at % C13N15 abundance in 8 mg of NNO with an error of 0.015 at % N15 in the neighbourhood of the natural abundances of C13 and N15 respectively.

Published
1955
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9. Polarization at small angles in elastic pbar p and pbar C scattering at 550 MeV / c

Author

BIRSA, RENATO, BRADAMANTE, FRANCO, DALLA TORRE, SILVIA, GIORGI, MARCELLO, MARTIN, ANNA, SCHIAVON, PAOLO, A. Penzo, A. Villari, S. Degli Agosti, E. Heer, R. Hees, C. Lechanoine Leluc, Y. Onel, D. Rapin, K. Bos, J. C. Kluyver, R. A. Kunne, L. Linssen, C. Beard, D. V. Bugg, J. R. Hall, A. S. Clough, R. L. Shypit, Birsa, Renato, Bradamante, Franco, DALLA TORRE, Silvia, Giorgi, Marcello, Martin, Anna, A., Penzo, Schiavon, Paolo, A., Villari, S., Degli Agosti, E., Heer, R., Hee, C., Lechanoine Leluc, Y., Onel, D., Rapin, K., Bo, J. C., Kluyver, R. A., Kunne, L., Linssen, C., Beard, D. V., Bugg, J. R., Hall, A. S., Clough, and R. L., Shypit

Subjects
pbar p elastic scattering, LEAR, analysing power, pbar C elastic scatterig
Published
1985

10. Measurement of dσ/dΩ and A_0N in pbar-p elastic scattering between 497 and 1550 MeV/c

Author

R. A. Kunne, C. I. Beard, K. Bos, D. V. Bugg, A. S. Clough, J. A. Edgington, J. R. Hall, E. Heer, R. Hess, J. C. Kluyver, C. Lechanoine Leluc, L. Linssen, T. O. Niinikoski, Y. Onel, A. Penzo, D. Rapin, J. M. Rieubland, A. Rijllart, R. L. Shypit, F. Tessarotto, A. Villari, P. Wells, BIRSA, RENATO, BRADAMANTE, FRANCO, DALLA TORRE, SILVIA, MARTIN, ANNA, SCHIAVON, PAOLO, R. A., Kunne, C. I., Beard, Birsa, Renato, K., Bo, Bradamante, Franco, D. V., Bugg, A. S., Clough, DALLA TORRE, Silvia, J. A., Edgington, J. R., Hall, E., Heer, R., He, J. C., Kluyver, C., Lechanoine Leluc, L., Linssen, Martin, Anna, T. O., Niinikoski, Y., Onel, A., Penzo, D., Rapin, J. M., Rieubland, A., Rijllart, Schiavon, Paolo, R. L., Shypit, F., Tessarotto, A., Villari, and P., Wells

Subjects
cross-section, antiproton-proton elastic scattering, analysing power, LEAR experiment
Published
1989

11. Interference effects between nuclear and Coulomb interactions of positive and negative pions in nuclear emulsion

Author

G.W. Van Apeldoorn, D.J. Holthuizen, M de Boer, and J. C. Kluyver

Subjects
Physics, Elastic scattering, Nuclear and High Energy Physics, Scattering, Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Nuclear physics, Scattering amplitude, symbols.namesake, Pion, symbols, Coulomb, Nuclear emulsion, Neutron, Rutherford scattering, Atomic physics
Published
1965
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15. Longitudinal Polarization of the Positrons from the Decay of Unpolarized Positive Muons

Author

T Massam, J. R. Holt, S. G. F. Frank, G. Culligan, and J. C. Kluyver

Subjects
Physics, Multidisciplinary, Muon, Spins, Astrophysics::High Energy Astrophysical Phenomena, Parity (physics), Electron, Polarization (waves), Nuclear physics, Positron, Pion, Physics::Accelerator Physics, High Energy Physics::Experiment, Fermi Gamma-ray Space Telescope
Abstract

IT is now well known that parity is not conserved in weak Fermi interactions, and that this generally results in longitudinal polarization of the spins of the emitted particles. Very strong polarizations of the muons emitted in pion decay1, and of the electrons emitted in beta decay2, have already been detected. The experiment reported here was aimed at detecting longitudinal polarization of the positrons emitted in the decay of unpolarized muons.

Published
1957
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18. First measurement of Donon in pbar-p elastic scattering

Author

R.L. Shypit, J.R. Hall, R. Birsa, R. Hess, P. Schiavon, D.V. Bugg, F. Tessarotto, E. Heer, C.I. Beard, J.C. Kluyver, Anne-Laure Martin, Aldo Penzo, L. Linssen, R.A. Kunne, J. M. Rieubland, A.S. Clough, Antonio Villari, C. Lechanoine-Leluc, Franco Bradamante, Y. Onel, T. O. Niinikoski, S. Dalla Torre-Colautti, M. Giorgi, A. Rijllart, J.A. Edgington, D. Rapin, K. Bos, R. A., Kunne, C. I., Beard, Birsa, Renato, K., Bo, Bradamante, Franco, D. V., Bugg, A. S., Clough, DALLA TORRE, Silvia, J. A., Edgington, Giorgi, Marcello, J. R., Hall, E., Heer, R., He, J. C., Kluyver, C., Lechanoine Leluc, L., Linssen, Martin, Anna, T. O., Niinikoski, Y., Onel, A., Penzo, D., Rapin, J. M., Rieubland, A., Rijllart, Schiavon, Paolo, R. L., Shypit, F., Tessarotto, and A., Villari

Subjects
Nuclear physics, Physics, Elastic scattering, Nuclear and High Energy Physics, depolarization parameter, pbar-p elastic scattering, LEAR, Theoretical models, Depolarization, Atomic physics, Nuclear Experiment
Abstract

The depolarization parameter Donon in p p elastic scattering has been measured at LEAR for thirteen momenta between 679 and 1550 MeV/c in the backward angular region. Striking disagreement with theoretical models is observed.

Published
1991

19. Measurement of antiproton-proton small-angle elastic scattering at low momentum

Author

C. Lechanoine-Leluc, D. Rapin, S. Dalla Torre-Colautti, C.I. Beard, A.S. Clough, R. Birsa, R.L. Shypit, J.C. Kluyver, Y. Onel, L. Linssen, J.R. Hall, D.V. Bugg, P. Schiavon, Antonio Villari, M. Giorgi, Franco Bradamante, Aldo Penzo, R.A. Kunne, Alan D. Martin, K. Bos, L., Linssen, C. I., Beard, Birsa, Renato, K., Bo, Bradamante, Franco, D. V., Bugg, A. S., Clough, DALLA TORRE, Silvia, Giorgi, Marcello, J. R., Hall, J. C., Kluyver, R. A., Kunne, C., Lechanoine Leluc, Martin, Anna, Y., Onel, A., Penzo, D., Rapin, Schiavon, Paolo, R. L., Shypit, and A., Villari

Subjects
Physics, Elastic scattering, Nuclear and High Energy Physics, pbar p elastic scattering, Large Hadron Collider, Proton, LEAR, forward direction, Momentum, Amplitude, Antiproton, Dispersion relation, Coulomb, Physics::Accelerator Physics, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, Particle Physics - Experiment
Abstract

Two high statistics measurements of antiproton-proton small-angle elastic scattering, at p = 233 MeV/c and p = 272 MeV/c, are presented. The measurements were carried out at the LEAR facility at CERN. By the Coulomb-nuclear interference method, values are obtained for the real-to-imaginary ratio ρ of the pp forward nuclear scattering amplitude and for its exponential slope b: ρ = + 0.041 ± 0.026 and b = 71.5 ± 4.5 (GeV/c)−2 at 233 MeV/c and ρ = −0.014 ± 0.027 and b = 47.7 ± 2.7 (GeV/c)−2 at 272 MeV/c. The method to derive these values is discussed in detail and so are the uncertainties contributing to their systematic error. The results are compared with predictions from forward dispersion relation calculations and with predictions from pp potential models.

Published
1987
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20. Asymmetry in pbar-p elastic scattering

Author

Kunne, R. A., Beard, C. I., Birsa, Renato, Bos, K., Bradamante, Franco, Bugg, D. V., Clough, A. S., DALLA TORRE, Silvia, Degli Agosti, S., Edgington, J. A., Hall, J. R., Heer, E., Hess, R., Kluyver, J. C., Lechanoine Leluc, C., Linssen, L., Martin, Anna, Niinikoski, T. O., Onel, Y., Penzo, A., Rapin, D., Rieubland, J. M., Rijllart, A., Schiavon, Paolo, Shypit, R. L., Tessarotto, F., Villari, A., Wells, P., R. A., Kunne, C. I., Beard, Birsa, Renato, K., Bo, Bradamante, Franco, D. V., Bugg, A. S., Clough, DALLA TORRE, Silvia, S., Degli Agosti, J. A., Edgington, J. R., Hall, E., Heer, R., He, J. C., Kluyver, C., Lechanoine Leluc, L., Linssen, Martin, Anna, T. O., Niinikoski, Y., Onel, A., Penzo, D., Rapin, J. M., Rieubland, A., Rijllart, Schiavon, Paolo, R. L., Shypit, F., Tessarotto, A., Villari, and P., Wells

Subjects
antinucleon-nucleon interaction, polarization, LEAR, antinucleon-nucleon interactions
Published
1988

21. Polarization at small angles in antiproton-carbon elastic scattering at LEAR energies

Author

Aldo Penzo, R.A. Kunne, D. Rapin, Franco Bradamante, F. Tessarotto, D.V. Bugg, P. Schiavon, Antonio Villari, J.C. Kluyver, J.R. Hall, C. Lechanoine-Leluc, Anne-Laure Martin, R. Hess, Anna Zanetti, R. Birsa, S. Dalla Torre-Colautti, E. Heer, K. Bos, Martin, Anna, Birsa, Renato, K., Bo, Bradamante, Franco, D. V., Bugg, DALLA TORRE, Silvia, J. R., Hall, E., Heer, R., He, J. C., Kluyver, R. A., Kunne, C., Lechanoine Leluc, A., Penzo, D., Rapin, Schiavon, Paolo, F., Tessarotto, A., Villari, and Zanetti, ANNA MARIA

Subjects
Elastic scattering, Physics, Nuclear and High Energy Physics, Large Hadron Collider, Scattering, Momentum transfer, LEAR, polarized antiprotons, antiproton-carbon elastic scattering, Polarization (waves), Nuclear physics, Amplitude, polarized antiproton, Antiproton, Physics::Accelerator Physics, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, Glauber, Particle Physics - Experiment
Abstract

A double-scattering experiment of antiprotons on carbon has been carried out at the Low-Energy Antiproton Ring (LEAR) at CERN, to measure the polarization parameter A p C in antiproton-carbon elastic scattering at small angles. The polarization parameter has been inferred from the azimuthal distribution of the antiprotons after the second scattering. Data have also been collected with a liquid-hydrogen target as the second scatterer, thus allowing the sign of A p C to be determined. The experiment has been performed at two momenta of the extracted antiproton beam, 800 and 1100 MeV/c. A small positive value of the polarization has been observed, compatible with energy independence and a linear increase with the momentum transfer q. Parametrizing A p C as acq, we get ac = +0.72 0.10+0.09(GeV/c)−1. This result is compared with potential model predictions for NN amplitudes through a Glauber theory calculation.

Published
1988

22. Evidence against the S-meson

Author

P. Schiavon, L. Linssen, D. Rapin, Franco Bradamante, C.I. Beard, Aldo Penzo, Alan D. Martin, A.S. Clough, R.A. Kunne, S. Degli-Agosti, M. Giorgi, R. Birsa, Y. Onel, J.C. Kluyver, K. Bos, J.A. Edgington, D.V. Bugg, C. Lechanoine-Leluc, S. Dalla Torre-Colautti, Antonio Villari, E. Heer, R. Hess, J.R. Hall, A. S., Clough, C. I., Beard, D. V., Bugg, J. A., Edgington, J., Hall, K., Bo, J. C., Kluyver, R. A., Kunne, L., Linssen, Birsa, Renato, Bradamante, Franco, DALLA TORRE, Silvia, Giorgi, Marcello, Martin, Anna, A., Penzo, Schiavon, Paolo, A., Villari, S., Degli Agosti, E., Heer, R., He, C., Lechanoine Leluc, Y., Onel, and D., Rapin

Subjects
Nuclear physics, Momentum, Physics, Nuclear and High Energy Physics, Meson, pbar p total cross-section, Nuclear Theory, LEAR, baryonium, Nuclear Experiment
Abstract

Measurements are reported of pp total cross sections from 388 to 599 MeV/c in small momentum steps. Statistical errors are typically ±0.4%and the normalisation uncertainty is ±0.7%. There is no evidence for the “S-meson”.

Published
1984

23. Real-to-imaginary ratio of the $\overline{p}p$ forward elastic scattering amplitude at 550, 757, and 1077 MeV/c

Author

S. Dalla Torre-Colautti, Y. Onel, R.L. Shypit, D. Rapin, A.S. Clough, R. Hess, C. Lechanoine-Leluc, J.C. Kluyver, Anne-Laure Martin, J.R. Hall, Aldo Penzo, F. Tessarotto, R.A. Kunne, Franco Bradamante, Antonio Villari, P. Schiavon, K. Bos, R. Birsa, E. Heer, L. Linssen, Schiavon, Paolo, Birsa, Renato, K., Bo, Bradamante, Franco, A. S., Clough, DALLA TORRE, Silvia, J. R., Hall, E., Heer, R., He, J. C., Kluyver, R. A., Kunne, C., Lechanoine Leluc, L., Linssen, Martin, Anna, Y., Onel, A., Penzo, D., Rapin, R. L., Shypit, F., Tessarotto, and A., Villari

Subjects
Elastic scattering, Physics, Nuclear reaction, Nuclear and High Energy Physics, antiproton-proton elastic scattering, forward amplitude, LEAR, Interference (wave propagation), Nuclear physics, Amplitude, Coulomb, Atomic physics, Particle Physics - Experiment
Abstract

The ratio of the real to the imaginary part of the pp forward elastic-scattering amplitude ϱ has been measured at 550, 757, and 1077 MeV/c at LEAR, using the Coulomb-nuclear interference method. The results obtained for ρ and b, the nuclear slope, are ϱ = 0.084 ± 0.051 and b = 20.9 ± 2.1 (GeV/c)−2 at 550 MeV/c, ϱ = 0.102 ± 0.043 and b = 18.0 ± 0.5 (GeV/c)−2 = at 757 MeV/c, and ϱ = 0.059 ± 0.035 and b = 15.2 ± 0.3 (GeV/c)−2 at 1077 MeV/c.

Published
1989

24. p̄p total cross sections below 420 MeV/c

Author

J.R. Hall, D. Rapin, A.S. Clough, Franco Bradamante, P. Schiavon, Aldo Penzo, R.A. Kunne, R.L. Shypit, S. Dalla Torre-Colautti, Y. Onel, Antonio Villari, Catherine Leluc, E. Heer, L. Linssen, Alan D. Martin, K. Bos, R. Birsa, D.V. Bugg, J.C. Kluyver, D. V., Bugg, J., Hall, A. S., Clough, R. L., Shypit, K., Bo, J. C., Kluyver, R. A., Kunne, L., Linssen, Birsa, Renato, Bradamante, Franco, DALLA TORRE, Silvia, Martin, Anna, A., Penzo, Schiavon, Paolo, A., Villari, E., Heer, C., Leluc, Y., Onel, and D., Rapin

Subjects
Nuclear physics, Cross section (geometry), Physics, Nuclear and High Energy Physics, pbar p total cross-section, Nuclear Theory, LEAR, baryonium, Physics::Accelerator Physics, Nuclear Experiment, Resonance (particle physics)
Abstract

pp total cross sections have been measured from 220 to 413 MeV/ c in small (⩽ 10 MeV/ c ) steps of momentum with statistics of ± 0.5 %. There is no evidence for structure in the cross section, and a limit of 8 mb MeV/ c 2 is set with 90% confidence on the strength of any narrow resonance down to 250 MeV/ c .

Published
1987

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