Search for Resonances Decaying to Top and Bottom Quarks with the CDF Experiment

Aaltonen, T. and Amerio, S. and Amidei, D. and Anastassov, A. and Annovi, A. and Antos, J. and Anza, F. and Apollinari, G. and Appel, J. A. and Arisawa, T. and Artikov, A. and Asaadi, J. and Ashmanskas, W. and Auerbach, B. and Aurisano, A. and Azfar, F. and Badgett, W. and Bae, T. and Barbaro-Galtieri, A. and Barnes, V. E. and Barnett, B. A. and Barria, P. and Bartos, P. and Bauce, M. and Bedeschi, F. and Behari, S. and Bellettini, G. and Bellinger, J. and Benjamin, D. and Beretvas, A. and Nagai, Yoshikazu (2015) Search for Resonances Decaying to Top and Bottom Quarks with the CDF Experiment. PHYSICAL REVIEW LETTERS, 115 (6). ISSN 0031-9007

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Abstract

We report on a search for charged massive resonances decaying to top (t) and bottom (b) quarks in the full data set of proton-antiproton collisions at center-of-mass energy of √s = 1.96 TeV collected by the CDF II detector at the Tevatron, corresponding to an integrated luminosity of 9.5 fb−1. No significant excess above the standard model (SM) background prediction is observed. We set 95% Bayesian credibility mass-dependent upper limits on the heavy charged particle production cross section times branching ratio to tb. Using a SM extension with a W ′ → tb and left-right-symmetric couplings as a benchmark model, we constrain the W ′ → tb mass and couplings in the 300 to 900 GeV/c2 range. The limits presented here are the most stringent for a charged resonance with mass in the range 300 – 600 GeV/c2 decaying to top and bottom quarks.

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