Asymmetry Analysis A. Schälicke, 23 May 2006 Status: independent analyses give similar asymmetries but (significant) different errors

Asymmetry analysis Open questions: final asymmetry and final error Analysis steps: background subtraction combination of runs systematic studies

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

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)

systematic studies possi - check eta - correction flyer suppression do not change mean, but estimate systematic uncertainties

remaining tasks understand error calculations (of each other) state number of used points (after cuts)