Speaker
Mr
Claude Charlot
(Ecole Polytechnique)
Description
We describe the strategy developed for electron reconstruction in CMS. Emphasis is
put on isolated electrons and on recovering the bremsstrahlung losses due to the
presence of the material before the ECAL. Following the strategy used for the high
level triggers, a first
filtering is obtained building seeds from the clusters reconstructed in the ECAL. A
dedicated trajectory building is then used to collect hits up to the ECAL front face.
The fit of the electron trajectories involves a Gaussian sum filter, allowing to take
into account the bremsstrahlung losses. The different topologies observed in the ECAL
and the difference between the momentum at the innermost and outermost track
positions are then used to classify electrons according to their patterns regarding
radiative losses. These electron classes are finally used to correct the momentum
estimate and to improve the electron identification.
| Submitted on behalf of Collaboration (ex, BaBar, ATLAS) | CMS |
|---|
Author
Mr
Claude Charlot
(Ecole Polytechnique)
