# Search for a Very Light CP-Odd Higgs Boson in Top Quark Decays from p-anti-p Collisions at 1.96 TeV

Abstract : We present the results of a search for a very light CP-odd Higgs boson $a_1^0$ originating from top quark decays t -> H^+ b -> W^+ a_1^0 b, and subsequently decaying into tau-tau. Using a data sample corresponding to an integrated luminosity of 2.7 inv fb 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 a_1^0.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00589795
Contributor : Swarna Bassava <>
Submitted on : Monday, May 2, 2011 - 11:23:56 AM
Last modification on : Saturday, December 12, 2020 - 3:16:00 AM

### Citation

T. Aaltonen, B. Alvarez Gonzalezv, S. Amerio, D. Amidei, A. Anastassov, et al.. Search for a Very Light CP-Odd Higgs Boson in Top Quark Decays from p-anti-p Collisions at 1.96 TeV. Physical Review Letters, American Physical Society, 2011, 107, pp.031801. ⟨10.1103/PhysRevLett.107.031801⟩. ⟨in2p3-00589795⟩

Record views