The strange "File Id" dependence in both FTPC East and FTPC West were found in AuAu@200GeV data. It was fould that for the same production library there was files produced with different library setup, and large part of the files was with broken FTPC data.
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The method for acceptance correction in the case of azimuthally asymmetric detector (for example ZDC SMD in STAR) was suggested. The method was successfully applied in the anisotropic flow analysis of AuAu@62GeV ZDC SMD data
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