Search for new particles leading to Z+jets final states in pp collisions at {radical}(s)=1.96 TeV
- Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki (Finland)
- University of Illinois, Urbana, Illinois 61801 (United States)
We present the results of a search for new particles that lead to a Z boson plus jets in pp collisions at {radical}(s)=1.96 TeV using the Collider Detector at Fermilab (CDF II). A data sample with a luminosity of 1.06 fb{sup -1} collected using Z boson decays to ee and {mu}{mu} is used. We describe a completely data-based method to predict the dominant background from standard model Z+jet events. This method can be similarly applied to other analyses requiring background predictions in multijet environments, as shown when validating the method by predicting the background from W+jets in tt production. No significant excess above the background prediction is observed, and a limit is set using a fourth generation quark model to quantify the acceptance. Assuming BR(b{sup '}{yields}bZ)=100% and using a leading-order calculation of the b{sup '} cross section, b{sup '} quark masses below 268 GeV/c{sup 2} are excluded at 95% confidence level.
- OSTI ID:
- 21032307
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 76, Issue 7; Other Information: DOI: 10.1103/PhysRevD.76.072006; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA). CDF Collaboration; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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