Search for resonances decaying to top and bottom quarks with the CDF experiment

Journal Article · Mon Aug 03 00:00:00 EDT 2015 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.115.061801· OSTI ID:1212738

Aaltonen, Timo Antero ^[1]

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1. Univ. of Helsinki, Helsinki (Finland). et al.

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 a 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 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 standard model extension with a W' → tb and left-right-symmetric couplings as a benchmark model, we constrain the W' mass and couplings in the 300–900 GeV/c² range. As a result, 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.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: CDF
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1212738
• Report Number(s): FERMILAB-PUB-15-123-PPD; arXiv eprint number arXiv:1504.01536
• Journal Information: Physical Review Letters, Vol. 115, Issue 6; ISSN 0031-9007
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English