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Title: A framework to analyze searches for gauge bosons of the hidden light sector in electron scattering fixed target experiments

Electron scattering fixed target experiments are a versatile tool to probe various kinds of physics phenomena. Recently fixed target experiments in which an electron beam is scattered off a heavy nucleus and a lepton-antilepton pair is created, i.e. e(A,Z) →e(A,Z)l{sup +}l{sup −}, were utilized to search for physics beyond the standard model at modest energies. In these experiments one searches for a small, narrow resonance in the invariant mass spectrum of the lepton-antilepton pair, arising from the exchange of a new light gauge boson γ′ coupling to the dark sector as well as very weakly to standard model particles. Such a signal would appear as an enhancement over a smooth QED background. Hence a precise understanding of the background is crucial. We present a theoretical analysis of the process e(A,Z) →e(A,Z)l{sup +}l{sup −}. Therefore we have performed an analysis of the cross section, which is then used to extract exclusion limits on the parameter space of the γ′, describing the existing experimental data taken at MAMI.
Authors:
 [1]
  1. Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz and PRISMA Cluster of Excellence, Johannes Gutenberg-Universität Mainz, D-55099 Mainz (Germany)
Publication Date:
OSTI Identifier:
22280659
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1563; Journal Issue: 1; Conference: Workshop to explore physics opportunities with intense, polarized electron beams at 50-300 MeV, Cambridge, MA (United States), 14-16 Mar 2013; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANTILEPTONS; BOSONS; COUPLING; CROSS SECTIONS; ELECTRON BEAMS; ELECTRONS; HEAVY NUCLEI; INELASTIC SCATTERING; MASS SPECTRA; QUANTUM ELECTRODYNAMICS; RESONANCE; STANDARD MODEL; VISIBLE RADIATION