Title
Search for new particles leading to Z+jets final states in <tex>$p\overline{p}$</tex> collisions at <tex>$\sqrt{s}$</tex>=1.96 TeV Search for new particles leading to Z+jets final states in <tex>$p\overline{p}$</tex> collisions at <tex>$\sqrt{s}$</tex>=1.96 TeV
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Lancaster, Pa ,
Subject
Physics
Source (journal)
Physical review : D : particles and fields. - Lancaster, Pa, 1970 - 2003
Volume/pages
76(2007) :7 , p. 072006,1-072006,24
ISSN
0556-2821
ISI
000250621200011
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We present the results of a search for new particles that lead to a Z boson plus jets in pp&#773; 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 tt&#773; 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.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/b72cc6/a24d6b15.pdf
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