Speaker
Dr
David Cooke
(ETH Zurich)
Description
The NA64 experiment is a fixed target experiment at the SPS at CERN, searching for new physics using an active beam dump to detect missing-energy events. It employs a tracker based on multiplexed micromegas detectors, which presents a unique challenge with respect to reconstructing particle trajectories. In particular, the signature of dark photon (or alternatively $^8$Be anomaly X boson) decay to e$^+$e$^-$ pair requires the reconstruction of the decay vertex \textit{after} the beam dump calorimeter, where owing to a lack of hermiticity, additional particles may also be present. This talk reports on the progress towards reconstructing such events, using simulation and a test data set from NA64 2017 run comprising dimuon events (which have a similar experimental signature).
Primary author
Dr
David Cooke
(ETH Zurich)
Co-authors
Prof.
Andre Rubbia
(ETH Zurich)
Dr
Balint Radics
(ETH Zurich)
Dr
Dipanwita Banerjee
(CERN)
Mr
Emilio Depero
(ETH Zurich)
Dr
Paolo Crivelli
(ETH Zurich)
