Mar 21 – 27, 2009
Europe/Prague timezone

Online event filtering at BESIII

Mar 26, 2009, 8:00 AM


Prague Congress Centre 5. května 65, 140 00 Prague 4, Czech Republic
Board: Thursday 100
poster Online Computing Poster session


Chendong FU (IHEP, Beijing)


BEPCII is the electron-positron collider with the highest luminosity at tau-charm energy region and BESIII is the corresponding detector with greatly improve detection capacity. For the accelerator and detector, the event tigger is rathe high. In order to reduce the background level and the recorder burden of computers, the online event filtering algorithm is established. Such an algorithm classifies background and physics events as fast as possible by adopting the information provided by different sub-detectors according to their strengths and capacities. The filter efficiency and processor time are also checked. The running results indicate that the algorithm satisfies the requirements of online data acquision system and corresponding physics analysis. The classified results by online event filtering are also used to estimate the collider luminosity and monitor the status of data-taking process.

Primary author

Chendong FU (IHEP, Beijing)

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