We present the results of a search for a very light CP-odd
Higgs boson a0_1 originating from top quark decays t --> H+/- b
--> W+/-(*) a0_1 b, and subsequently decaying into t+ t-. Using a
data sample corresponding to an integrated luminosity of 2.7 fb-1
collected by the CDF II detector in p anti-p collisions at 1.96 TeV,
we perform a search for events containing a lepton, three or more jets,
and an additional isolated track with transverse momentum in the range
3 to 20 GeV/c. Observed events are consistent with background sources,
and 95% C.L. limits are set on the branching ratio of t --> H+/-
b for various masses of H+/- and a0_1.
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Updated: Thursday, 2011 August 25 15:44:03 CDT automatically from input from "Carol Picciolo"