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Article
Search for a New Gauge Boson in Electron-Nucleus Fixed-Target Scattering by the APEX Experiment
Physical Review Letters
  • S. Abrahamyan, Yerevan Physics Institute
  • Timothy Holmstrom, Longwood University
Document Type
Article
Publication Date
11-4-2011
Abstract

We present a search at the Jefferson Laboratory for new forces mediated by sub-GeV vector bosons with weak coupling α′ to electrons. Such a particle A′ can be produced in electron-nucleus fixed-target scattering and then decay to an e+e- pair, producing a narrow resonance in the QED trident spectrum. Using APEX test run data, we searched in the mass range 175–250 MeV, found no evidence for an A′→e+e- reaction, and set an upper limit of α′/α≃10-6. Our findings demonstrate that fixed-target searches can explore a new, wide, and important range of masses and couplings for sub-GeV forces.

DOI
10.1103/PhysRevLett.107.191804
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Publisher's PDF
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Comments

© 2011 American Physical Society. The original publication is available at http://link.aps.org/doi/10.1103/PhysRevLett.107.191804

Original Citation

Phys. Rev. Lett. 107, 191804 (2011)

Citation Information
S. Abrahamyan, Timothy Holmstrom and. "Search for a New Gauge Boson in Electron-Nucleus Fixed-Target Scattering by the APEX Experiment" Physical Review Letters Vol. 107 Iss. 19 (2011) p. 191804-1 - 191804-5
Available at: http://works.bepress.com/timothy_holmstrom/5/