Kavli Affiliate: Gordan Krnjaic
| First 5 Authors: Torsten Akesson, Torsten Akesson, , ,
| Summary:
The Light Dark Matter eXperiment (LDMX) is an electron fixed-target
experiment optimized to search for sub-GeV dark matter production through the
missing momentum signature. LDMX is designed to operate in End Station A at
SLAC, using an 8 GeV electron beam accelerated alongside the LCLS-II drive
beam. The design of the apparatus is strongly motivated by the performance
requirements of a high-rate missing momentum search and leverages detector
technologies and designs from other experiments along with existing facilities
at SLAC. LDMX will improve on previous results by up to three orders of
magnitude, enabling broad sensitivity to dark sector scenarios including the
dark matter interaction strengths motivated by freeze-out of MeV-GeV mass dark
matter to the observed relic abundance. With hermetic forward coverage, LDMX
also has sensitivity to visible signatures of dark sectors and provides a
unique probe of electron-nuclear interactions important to interpreting data
from accelerator-based neutrino experiments. This report encompasses the
technical design of the LDMX Detector, its simulated performance, and the
physics capabilities of the experiment.
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