PROJECT 2 - indico.nikhef.nl · Measurements Twoconfigurations:W→EandE→W Counts N 1 N 2...
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PROJECT 2 GROUP 9 TOPICAL LECTURES GROUP 9 (NIKHEF) PROJECT 2 25/03/2015 1/5
Transcript of PROJECT 2 - indico.nikhef.nl · Measurements Twoconfigurations:W→EandE→W Counts N 1 N 2...
PROJECT 2
GROUP 9
TOPICAL LECTURES
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Setup
Distance67 cm between scintillators45 degree orientation.Opening angle ≈ 24 deg.
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Calibration
CalibrationTuned threshold : to haveapprox. equal count rate.Count rate checked foreach individual scintillatorand in coincidence.
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Measurements
Two configurations : W→E and E→W
CountsN1 N2 Counts/min
East 736 807 4.6879 ± 0.16904West 657 759 4.2932 ± 0.16170
Time(min) 152 178
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Results and Conclusions
Statistical uncertaintiesA = f W −f E
f W +f E
σ2A = A2
[σ2
(f W −f E )2 + σ2
(f W +f E )2
]σ2 = σ2
f W + σ2f E
Final resultsA = -0.0439 ± 0.0260P(A<0) ≈ 0.95
ConclusionsExcess from the East (or lack of experimental capabilities)
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