### Session X11: Top II

1:30 PM–3:18 PM, Tuesday, April 15, 2008
Hyatt Regency St. Louis Riverfront (formerly Adam's Mark Hotel), Room: St. Louis B

Chair: Amnon Harel, University of Rochester

Abstract ID: BAPS.2008.APR.X11.5

### Abstract: X11.00005 : Search for W' boson resonances decaying to a top quark and a bottom quark

2:18 PM–2:30 PM

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#### Author:

Monica Pangilinan
(Brown University)

We search for the production of a heavy W' gauge boson that decays to third generation quarks in 0.9 fb$^{-1}$ of p pbar collsions at $\sqrt{s}$ = 1.96 TeV, collected with the D0 detector at the Fermilab Tevatron collider. We find no significant excess in the final-state invariant mass distribution and set upper limits on the production cross section times branching fraction. For a left-handed W' boson with SM couplings, we set a lower mass limit of 731 GeV. For right-handed W' bosons, we set lower mass limits of 739 GeV if the W' boson decays to both leptons and quarks and 768 GeV if the W' boson decays only to quarks. We also set limits on the coupling of the W' boson to fermions as a function of its mass.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2008.APR.X11.5