added track requirement to be zero in central part to enhance diffraction. problems with huge noise. switched to only p going die for single arm trigger. reduced em. still lot of noise. mc cannot describe data. maybe because of large noise contrib. ratio single to double are 0.6 in data but 0.8 in mc
added track requirement to be zero in central part to enhance diffraction. problems with huge noise. switched to only p going die for single arm trigger. reduced em. still lot of noise. mc cannot describe data. maybe because of large noise contrib. ratio single to double are 0.6 in data but 0.8 in mc