2-7 June 2019
Simon Fraser University
America/Vancouver timezone
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Searches for Dark Sectors in Fixed-Target Experiments

Jun 4, 2019, 1:45 PM
SCC 9002 (Simon Fraser University)

SCC 9002

Simon Fraser University

Invited Speaker / Conférencier(ère) invité(e) Symposia Day - Dark Matter T3-4 Dark matter and dark sectors (PPD) | Matière sombre et secteurs sombres (PPD)


Miriam Diamond (SLAC National Laboratory)


The leading dark matter (DM) paradigm over the past few decades has been that of a Weakly Interacting Massive Particle with a mass of tens of GeV to a few TeV. But in light of recent experimental constraints, attention is increasingly turning to models with lower-mass DM, especially in the context of a "dark sector" featuring dark mediators and multiple DM particle species. Probing such models requires exploiting complementarity between different types of DM searches, where electron-beam fixed-target experiments play an important role in the DM mass range of a few to hundreds of MeV. These experiments seek to generate dark sector particles, such as dark photons, via electron-nucleus scattering and emission processes analogous to standard bremsstrahlung. Identifying the visible decay products of the dark sector particles, such as electron-positron or muon-antimuon pairs, requires precise reconstruction of narrow mass resonances and/or displaced vertices; accounting for invisible decay products requires precise missing energy and/or momentum measurements. In this talk, I will give an overview of the landscape of current and planned fixed-target DM searches, with the Heavy Photon Search (HPS) and its planned successor LDMX (Light Dark Matter eXperiment) as specific examples.

Primary author

Miriam Diamond (SLAC National Laboratory)

Presentation materials