\title{The Heavy Photon Search Experiment at Jefferson Laboratory}

\author{Sho Uemura\\SLAC National Accelerator Laboratory\\HPS Collaboration}

\date{January 11, 2013}

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\begin{abstract}
	The Heavy Photon Search (HPS) is a new experiment at Jefferson Lab that will search for 
	massive U(1) vector bosons (also known as heavy photons, dark photons, or $A'$)
	of mass 20--1000 MeV that couple to electric charge with relative coupling $\alpha'/\alpha$ of $10^{-5}$--$10^{-10}$.
	The HPS experiment is designed to produce heavy photons by electron scattering off a fixed target, and 
	detect them using two decay channels ($e^+e^-$ or $\mu^+\mu^-$ pairs) and two signatures (invariant mass resonance and displaced decay vertex).
	The detector is a compact, large-acceptance forward spectrometer 
	comprising a silicon microstrip tracker for momentum measurement and vertexing, an electromagnetic calorimeter for triggering on $e^+e^-$, and a muon detector for triggering on $\mu^+\mu^-$.
	This talk will cover the motivations for heavy photons and give an overview of the HPS experiment.

\end{abstract}

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