Download - V. Šimák D0 experiment and CTU Prague
V. Šimák, D0 FNAL and CTU Prague 1
Measurement of the differential cross section dσ/dt in elastic antiproton-proton scattering at
V. Šimák D0 experiment and CTU Prague
for D0 experiment
7/5/2012
V. Šimák, D0 FNAL and CTU Prague 2
MotivationElastic scattering - first results in any hadrons' experiment
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Several phenomenology models:
-Geometrical scaling-Clouds structure-…….
L.M. Dremin: aXiv. 1206.5474v1 [hep] 24. Jan. 1012
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In Run II at Tevatron: D0 + PFD (2002)
Covered regions for scattered protons/antiprotons
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FPD scintillating fiber detector
Layers
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Comparison of detector y coordinatesIn the spectrometers Pu and Pd
Difference in reconstructed t between proton and antiproton, comparison of Monte Carlo with the data
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Monte Carlo comparison
Trigger efficiencies for detectors: 50% to 70%
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Position of detector with respect to beam center
Primary vertexreconstruction
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The correlation plots y-p vs y-ap for the first detectors .The dashed lines correspond to the fiducially requirements applied
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Trigger efficiencies for first four detectors: 50% to 70%
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dn/dt raw signal selection , background , applied acceptance, applied eff. and acceptance:
V. Hynek7/5/2012
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Results
Change of slope at
A. Brandt, C. Avila
b = 16.86 ± 0.10 (stat) ± 0.20 (sys) Submitted to PRD
Fermilab-Pub-12-263-E
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Comparison of result with other experiments
Measurement of elastic scattering with FPD cover larger and higher that experiments: UA4, UA8, CDF
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TEVATRON and D0 detector have finished all data collection but the analyses of full set of data is continuing
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Thank you
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