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Production of the Upsilon(1S) meson in association with a vector boson is arare process in the standard model with a cross section predicted to be belowthe sensitivity of the Tevatron. Observation of this process could signifycontributions not described by the standard model or reveal limitations withthe current non-relativistic quantum-chromodynamic models used to calculate thecross section. We perform a search for this process using the full Run II dataset collected by the CDF II detector corresponding to an integrated luminosityof 9.4/fb. The search considers the Upsilon(1S) to di-muon decay and the decayof the W and Z bosons into muons and electrons. In these purely leptonic decaychannels, we observe one Upsilon(1S)W candidate with an expected background of1.2 +/- 0.5 events, and one Upsilon(1S)Z candidate with an expected backgroundof 0.1 +/- 0.1 events. Both observations are consistent with the predictedbackground contributions. The resulting upper limits on the cross section forUpsilon(1S)+W/Z production are the most sensitive reported from a singleexperiment and place restrictions on potential contributions fromnon-standard-model physics.

Search for production of an Upsilon(1S) meson in association with a W or Z boson using the full 1.96 TeV proton anti-proton collision data set at CDF