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Phys. Rev. Lett. 98, 221803 (2007) [7 pages]

Inclusive Search for New Physics with Like-Sign Dilepton Events in pp̅ Collisions at s=1.96  TeV

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A. Abulencia et al. CDF Collaboration
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Received 28 February 2007; published 1 June 2007

We describe a search for anomalous production of events with two leptons (e or μ) of the same electric charge in pp̅ collisions at a center-of-mass energy of 1.96 TeV. Many extensions to the standard model predict the production of two leptons of the same electric charge. This search has a significant increase in sensitivity compared to earlier searches. Using a data sample corresponding to 1  fb-1 of integrated luminosity recorded by the CDF II detector, we observe no significant excess in an inclusive selection (expect 33.2±4.7 events, observe 44) or in a supersymmetry-optimized selection (expect 7.8±1.1 events, observe 13.)

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.221803
DOI:
10.1103/PhysRevLett.98.221803
PACS:
12.60.Jv, 13.85.Qk, 14.80.Ly