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Search for new particles leading to Z plus jets final states in p(p)over-bar collisions at root s=1.96 TeV

Aaltonen T.
•
Abulencia A.
•
Adelman J.
altro
Zucchelli S.
2007
  • journal article

Periodico
PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY
Abstract
We present the results of a search for new particles that lead to a Z boson plus jets in pp̄ collisions at s=1.96TeV using the Collider Detector at Fermilab (CDF II). A data sample with a luminosity of 1.06fb-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 tt̄ 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 268GeV/c2 are excluded at 95% confidence level.
DOI
10.1103/PhysRevD.76.072006
WOS
WOS:000250621200011
Archivio
http://hdl.handle.net/11390/848666
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-35448931078
Diritti
metadata only access
Scopus© citazioni
43
Data di acquisizione
Jun 14, 2022
Vedi dettagli
Web of Science© citazioni
37
Data di acquisizione
Mar 21, 2024
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