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

Download or read book Search for a Very Light CP-Odd Higgs Boson in Top Quark Decays from P$-̂p$ Collisions at 1.96 TeV. written by and published by . This book was released on 2011 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the results of a search for a very light CP-odd Higgs boson a1° originating from top quark decays t → H{sup {+-}}b → W{sup {+-}(*)} a1° b, and subsequently decaying into??−. Using a data sample corresponding to an integrated luminosity of 2.7 fb−1 collected by the CDF II detector in p{bar 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{sup {+-}}b for various masses of H{sup {+-}} and a1°.