Search for Long-Lived Particles Decaying into Electron or Photon Pairs with the D0 Detector

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Issue Date
2008-09-12Author
Baringer, Philip S.
Bean, Alice
Clutter, Justace Randall
Moulik, Tania
Wilson, Graham Wallace
Abazov, V. M.
Abbott, B.
Abolins, M.
Acharya, B. S.
Adams, M.
Adams, T.
Publisher
American Physical Society
Type
Article
Article Version
Scholarly/refereed, publisher version
Metadata
Show full item recordAbstract
In this Letter we report on a search for long-lived particles that decay into final states with two electrons or photons. Such long-lived particles arise in a variety of theoretical models, such as hidden valleys and supersymmetry with gauge-mediated breaking. By precisely reconstructing the direction of the electromagnetic shower we are able to probe much longer lifetimes than previously explored. We see no evidence of the existence of such long-lived particles and interpret this search as a quasi model-independent limit on their production cross section, as well as a limit on a long-lived fourth generation quark.
Description
This is the publisher's version, also available electronically from http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.101.111802.
ISSN
0031-9007Collections
Citation
V. M. Abazov et al. (D0 Collaboration). (2008). "Search for Long-Lived Particles Decaying into Electron or Photon Pairs with the D0 Detector." Physical Review Letters, 101(11):111802. http://dx.doi.org/10.1103/PhysRevLett.101.111802.
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