Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session J09: Sub-GeV Dark Matter
1:30 PM–3:18 PM,
Sunday, April 14, 2019
Sheraton
Room: Governor's Square 11
Sponsoring
Unit:
DPF
Chair: Bertrand Echenard, Caltech
Abstract: J09.00001 : The Heavy Photon Search Experiment
1:30 PM–1:42 PM
View Presentation Abstract
Presenter:
Matthew R Solt
(SLAC National Accelerator Laboratory)
Author:
Matthew R Solt
(SLAC National Accelerator Laboratory)
The Heavy Photon Search experiment searches for an electro-produced dark photon using an electron beam provided by CEBAF at the Thomas Jefferson National Accelerator Facility. HPS has successfully completed two engineering runs. In 2015 using a 1.056 GeV, 50 nA electron beam, 1.7 days (10 mC) of data was obtained and 5.4 days (92.5 mC) of data was collected in a run in 2016 using a 2.3 GeV, 200 nA electron beam. In addition, HPS will complete its first physics run in the summer of 2019. HPS looks for dark photons through two distinct methods – a resonance search in the e+e invariant mass distribution above the large QED background (large dark photon-SM particles coupling region) and a displaced vertex search for long-lived dark photons (small coupling region). Both analysis are complete for the 2015 engineering run and demonstrate the full functionality of the experiment that will probe hitherto unexplored parameter space with future, higher luminosity runs. Results from the 2015 dataset with emphasis on the displaced vertex search will be presented as well as an update on 2016 analysis and preparations for 2019 physics run.
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