A Study of Electron Pair Production in 16 GeV/C PI-minus Proton Collisions PDF Download
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Author: Max Marshall
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Category :
Languages : en
Pages : 474
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Author: Max Marshall
Publisher:
ISBN:
Category :
Languages : en
Pages : 474
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Author: David L. Blockus
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Category : Collisions (Nuclear physics)
Languages : en
Pages : 168
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Author:
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Category :
Languages : en
Pages :
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The production of prompt electron-positron pairs in 16 GeV/c .pi.−p collisions has been measured using the LASS spectrometer at SLAC. An excess of events is observed above the estimated contributions of direct and Dalitz decay of known resonances in the kinematic range defined by 0.1 less than or equal to x less than or equal to 0.45, 0 less than or equal to P/sub T/ less than or equal to 0.8 GeV/c and 0.2 less than or equal to M(ee−) less than or equal to 0.7 GeV/c2. The excess signal decreases slowly with increasing M, but exhibits very steep x and P/sub T/2 dependence. The contribution of this signal to the e+e−/.pi./sup +/.pi.− and .gamma./.pi. ratios is discussed. Detailed comparisons are made between e/sup +/e− distributions and the corresponding low mass .mu./sup +/.mu.− distributions, and a simple production mechanism is proposed which describes the 16 GeV/c data well. The implications for direct photon production are presented, and it is shown that the model provides simultaneously a good description of the experimental data on the (e/.pi.) and (.mu./.pi.) ratios for p/sub T/
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Category :
Languages : en
Pages :
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The production of prompt electron-positron pairs in 16 GeV/c .pi.−p collisions has been measured using the LASS spectrometer at SLAC. An excess of events is observed above the estimated contributions of direct and Dalitz decay of known resonances in the kinematic range defined by 0.1 less than or equal to x less than or equal to 0.45, 0 less than or equal to P/sub T/ less than or equal to 0.8 GeV/c and 0.2 less than or equal to M(ee−) less than or equal to 0.7 GeV/c2. The excess signal decreases slowly with increasing M, but exhibits very steep x and P/sub T/2 dependence. The contribution of this signal to the ee−/.pi./sup +/.pi.− and .gamma./.pi. ratios is discussed. Detailed comparisons are made between e/sup +/e− distributions and the corresponding low mass .mu./sup +/.mu.− distributions, and a simple production mechanism is proposed which describes the 16 GeV/c data well. The implications for direct photon production are presented, and it is shown that the model provides simultaneously a good description of the experimental data on the (e/.pi.) and (.mu./.pi.) ratios for p/sub T/
Author:
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Category : Nuclear energy
Languages : en
Pages : 850
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Author:
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Category : Power resources
Languages : en
Pages : 906
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Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
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Category : Aeronautics
Languages : en
Pages : 542
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Author: United States. Energy Research and Development Administration
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Category : Medicine
Languages : en
Pages : 776
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Author:
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Category : Physics
Languages : en
Pages : 1314
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Author:
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Category : Science
Languages : en
Pages : 650
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