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Asymmetry Analysis A. Schälicke, 23 May 2006 Status: independent analyses give similar asymmetries but (significant) different errors
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Asymmetry analysis Open questions: final asymmetry and final error Analysis steps: background subtraction combination of runs systematic studies
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Tel Aviv Method A (s i - b i+1 ) all plus cycle in one histo all minus cycle in one histogram calculate one single asymmetry Zeuthen + HUB Method D (s i -b j ) normalization to agsic calculate asymmetry for each cycle pair combine all asymmetries mean, statistical error, Chi2 obtain result for all crystals background subtraction asymmetry calculation Bill’s analysis somewhere in between
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further suggestions combine low sensitivity and high sensitivity (avoid saturation, but use higher resolution if available) combine asymmetries of all * crystal (independent result to check simulation, and systematic, but also improvement of final uncertainty)
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systematic studies possi - check eta - correction flyer suppression do not change mean, but estimate systematic uncertainties
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remaining tasks understand error calculations (of each other) state number of used points (after cuts)
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