We present a search for anomalous production of events with two
high-momentum leptons (electron or muon) of the same electric charge in
p anti-p collisions at a center-of-mass energy of 1.96 TeV. We use a data
sample corresponding to 1 fb-1 of integrated luminosity recorded by the CDF
II detector. We perform an inclusive selection with one lepton with
transverse momentum above 20 GeV/c and a second one above 10 GeV/c. The
standard model backgrounds for this signature are small. Many extensions to
the standard model, such as Supersymmetry and models with heavy Majorana
particles decaying into leptons, predict the production of two leptons of
the same electric charge. This search has better acceptance and examines
between a factor of three and ten more integrated luminosity compared to
earlier searches in the same channel, resulting in a significant increase in
sensitivity. We predict 33.2 +/- 4.7 events in our data sample and observe
44; the probability to observe an excess this large or larger is 9%. We
also examine a second scenario with increased sensitivity for SUSY-like
physics scenario in which a stable neutral particle escapes detection. In
that case, we predict 7.8 +/- 1.1 events and observe 13. The probability to
observe an excess this large or larger is 7%.
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Updated: Friday, 2007 June 29 09:35:31 CDT automatically from input from Carol Picciolo