Prof. Gordon Watts (UNIVERSITY OF WASHINGTON)Dr Laurent Vacavant (CPPM)
The ATLAS detector, one of the two collider experiments at the Large Hadron Collider, will take high energy collision data for the first time in 2009. A general purpose detector, its physics program encompasses everything from Standard Model physics to specific searches for beyond-the-standard-model signatures. One important aspect of separating the signal from large Standard Model backgrounds is the accurate identification of jets of particles originating from a bottom quark. A physics analysis in-and-of-itself, ATLAS has developed a series of algorithms based on the unique aspects of bottom quark decay (soft lepton association, long life time). This talk gives a brief overview of these algorithms and the software infrastructure required to support them in a production environment like the one found at ATLAS. Some attention will also be paid to the different perspectives of the algorithm writer, who wants to understand exactly how a jet is tagged as being from a bottom quark, and an analysis user, who is only curious to know if a jet is “tagged” and what the fake rate is.
|Presentation type (oral | poster)||oral|