Search for Light Gauge Bosons of the Dark Sector at the Mainz Microtron

Merkel, H. and Achenbach, P. and Ayerbe Gayoso, C. and Bernauer, J. C. and Bohm, R. and Bosnar, Damir and Debenjak, L. and Denig, A. and Distler, M. O. and Esser, A. and Fonvieille, H. and Friščić, Ivica and Middleton, D. G. and Muller, U. and Nungesser, L. and Pochodzalla, J. and Rohrbeck, M. and Sanchez Majos, S. and Schlimme, B. S. and Schoth, M. and Širca, S. and Weinriefer, M. (A1 Collaboration) (2011) Search for Light Gauge Bosons of the Dark Sector at the Mainz Microtron. Physical Review Letters, 106 (25). pp. 251802-4. ISSN 0031-9007

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Abstract

A new exclusion limit for the electromagnetic production of a light U(1) gauge boson gamma' decaying to e+e- was determined by the A1 Collaboration at the Mainz Microtron. Such light gauge bosons appear in several extensions of the standard model and are also discussed as candidates for the interaction of dark matter with standard model matter. In electron scattering from a heavy nucleus, the existing limits for a narrow state coupling to e+e- were reduced by nearly an order of magnitude in the range of the lepton pair mass of 210 MeV/c2 <me+e−<300  MeV/c2. This experiment demonstrates the potential of high current and high resolution fixed target experiments for the search for physics beyond the standard model.

Item Type: Article
Keywords: electron scattering, gauge bosons
Date: June 2011
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2011) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-1191005-1021
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 01 Jun 2014 12:54
Last Modified: 24 Feb 2016 15:15
URI: http://digre.pmf.unizg.hr/id/eprint/2068

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