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Title
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Search for new particles leading to Z+jets final states in collisions at =1.96 TeV
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Author
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Institution/Organisation
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CDF Collaboration
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Abstract
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| We present the results of a search for new particles that lead to a Z boson plus jets in pp̅ collisions at √s=1.96 TeV using the Collider Detector at Fermilab (CDF II). A data sample with a luminosity of 1.06 fb-1 collected using Z boson decays to ee and μμ 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 tt̅ 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′→bZ)=100% and using a leading-order calculation of the b′ cross section, b′ quark masses below 268 GeV/c2 are excluded at 95% confidence level. |
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Language
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English
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Source (journal)
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Physical review : D : particles, fields, gravitation, and cosmology / American Physical Society. - Ridge, N.Y., 2004 - 2015
Physical review : D : particles and fields. - Lancaster, Pa, 1970 - 2003
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Publication
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Ridge, N.Y.
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American Physical Society
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2007
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ISSN
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1550-7998
[print]
1550-2368
[online]
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Volume/pages
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76
:7
(2007)
, p. 072006,1-072006,24
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ISI
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000250621200011
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Full text (Publisher's DOI)
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Full text (open access)
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