Search for WZ+ZZ production with missing transverse energy+jets with b enhancement at √s=1.96 TeV
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AuthorAaltonen, Timo Antero; Amerio, Silvia; Amidei, Dante; Anastassov, Anton; Annovi, Alberto; Antos, Jaroslav; Apollinari, Giorgio; Appel, Jeffrey A.; Casal Laraña, Bruno; Cuevas Maestro, Francisco Javier; Gómez Gramuglio, Gervasio; Palencia Cortezón, Enrique; Rodrigo Anoro, Teresa; Ruiz Jimeno, Alberto; Scodellaro, Luca; Vila Álvarez, Iván; Vilar Cortabitarte, Rocío; Vizán García, Jesús Manuel; Apresyan, Artur; [et al.]
Diboson production (WW+WZ+ZZ) has been observed at the Tevatron in hadronic decay modes dominated by the WW process. This paper describes the measurement of the cross section of WZ and ZZ events in final states with large E̸T and using b-jet identification as a tool to suppress WW contributions. Because of the limited energy resolution, we cannot distinguish between partially hadronic decays of WZ and ZZ, and we measure the sum of these processes. The number of signal events is extracted using a simultaneous fit to the invariant mass distribution of the two jets for events with two b-jet candidates and events with fewer than two b-jet candidates. We measure a cross section σ(pp̅ →WZ,ZZ)=5.8-3.0+3.6 pb, in agreement with the standard model.
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