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Showing papers by "Université Paris-Saclay published in 1988"

Journal Article•DOI•
First result on a new measurement of epsilon '/ epsilon in the neutral-kaon system.

[...]

M. Woods1, K. Nishikawa1, J. R. Patterson1, Y. W. Wah1, B. Winstein1, Roland Winston1, H. Yamamoto1, E. C. Swallow2, E. C. Swallow1, G. J. Bock3, R. Coleman3, Y. B. Hsiung3, K. Stanfield3, R. J. Stefanski3, T. Yamanaka3, George D Gollin4, G. Grazer4, J. K. Okamitsu4, Patrick Jarry5, R. Daudin5, P. Debu5, B. Peyaud5, R. Turlay5 •
University of Chicago1, Elmhurst College2, Fermilab3, Princeton University4, Université Paris-Saclay5
13 Feb 1988-Physical Review Letters
TL;DR: A new beam line and detector were constructed to increase statistical precision and greatly reduce systematic uncertainty on the ratio of the CP-nonconserving parameters epsilon'/epsilon and a result from a first run shows the precision is better than earlier measurements yet the result is still consistent with the superweak mechanism.
Abstract: A new beam line and detector were constructed to increase statistical precision and greatly reduce systematic uncertainty on the ratio of the CP-nonconserving parameters epsilon'/epsilon. Major improve- ments are discussed together with a result from a first run: epsilon'/epsilon = 0.0032 +- 0.0028 (statistical) +- 0.0012 (systematic). The precision is better than earlier measurements yet the result is still consistent with the superweak mechanism (which predicts zero) and that due to Kobayashi and Maskawa. Significantly more data are being collected.

52 citations

Journal Article•DOI•
Measurement of the Differential Cross Section for the reaction 2H(γ,p)n at High Photon Energies and θc.m.=90°

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Jim Napolitano1, Jim Napolitano2, S. J. Freedman2, D. F. Geesaman2, Ronald Gilman2, M.C. Green2, R. J. Holt2, H. E. Jackson2, R.S. Kowalczyk2, C. Marchand2, C. Marchand3, J. E. Nelson2, B. Zeidman2, Douglas H Beck4, G. Boyd4, D. Collins4, B. W. Filippone4, J. Jourdan4, R. D. McKeown4, R. G. Milner4, D. H. Potterveld4, D. H. Potterveld2, R. C. Walker4, C. E. Woodward4, R. E. Segel5, T. Y. Tung5, P. E. Bosted6, E. R. Kinney7, E. R. Kinney3, Z. E. Meziani8, R. C. Minehart9 •
Thomas Jefferson National Accelerator Facility1, Argonne National Laboratory2, Université Paris-Saclay3, California Institute of Technology4, Northwestern University5, American University6, Massachusetts Institute of Technology7, Stanford University8, University of Virginia9
28 Nov 1988-Physical Review Letters
TL;DR: In this paper, the authors measured the differential cross section for two-body deuteron photodisintegration at θc.m.=90° and for photon energies between 0.8 and 1.6 GeV.
Abstract: We have measured the differential cross section for two-body deuteron photodisintegration at θc.m.=90° and for photon energies between 0.8 and 1.6 GeV. At energies above ≃ 1.2 GeV, the data appear to obey a simple scaling law predicted by constituent-counting rules assuming parton degrees of freedom for the deuteron and nucleons. Agreement with model calculations based on meson exchange or "reduced nuclear amplitudes" is discussed.

37 citations

Journal Article•DOI•
Determination of the optical constants of metals and semiconductors by combining ellipsometry with electron spectroscopy microscopy and X-ray specular reflection analysis

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G. Gergely1, Z. Bodó1, P. Croce2•
Hungarian Academy of Sciences1, Université Paris-Saclay2
01 Jul 1988-Surface Science
TL;DR: In this paper, the optical constants n(λ and k(λ) of metal and semiconductors are determined by spectroellipsometry in the spectral range λ=365-633 nm.

8 citations