Kaon Filtering For CLAS Data

McNabb, J.

Thomas Jefferson National Accelerator Facility (U.S.)

关键词: Filters;    Kaons;    72 Physics Of Elementary Particles And Fields;    Particle Tracks;    Monitoring;   

DOI  :  10.2172/774088
RP-ID  :  CLAS2001-001
RP-ID  :  AC05-84ER40150
RP-ID  :  774088

美国|英语

来源: UNT Digital Library

【 摘 要 】

The analysis of data from CLAS is a multi-step process. After the detectors for a given running period have been calibrated, the data is processed in the so called pass-1 cooking. During the pass-1 cooking each event is reconstructed by the program a1c which finds particle tracks and computes momenta from the raw data. The results are then passed on to several data monitoring and filtering utilities. In CLAS software, a filter is a parameterless function which returns an integer indicating whether an event should be kept by that filter or not. There is a main filter program called g1-filter which controls several specific filters and outputs several files, one for each filter. These files may then be analyzed separately, allowing individuals interested in one reaction channel to work from smaller files than using the whole data set would require. There are several constraints on what the filter functions should do. Obviously, the filtered files should be as small as possible, however the filter should also not reject any events that might be used in the later analysis for which the filter was intended.