Search for New Particles Leading to Z+jets Final States in p anti-p Collisions at s**(1/2) = 1.96-TeV

Aaltonen, T; Abulencia, A; Adelman, J; Affolder, Anthony Allen; Akimoto, T; Albrow, Michael G; Amerio, S; Amidei, Dante E; Anastassov, A; Anikeev, Konstantin V; Annovi, A

doi:10.1103/PhysRevD.76.072006

Title: Search for New Particles Leading to Z+jets Final States in p anti-p Collisions at s**(1/2) = 1.96-TeV

Journal Article · Fri Jun 01 00:00:00 EDT 2007 · Phys.Rev.D76:072006,2007

DOI:https://doi.org/10.1103/PhysRevD.76.072006· OSTI ID:919096

Aaltonen, T; Abulencia, A; Adelman, J; Affolder, Anthony Allen; Akimoto, T; Albrow, Michael G; Amerio, S; Amidei, Dante E; Anastassov, A; Anikeev, Konstantin V; Annovi, A

We present the results of a search for new particles that lead to a Z boson plus jets in p{bar p} 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 multi-jet environments, as shown when validating the method by predicting the background from W+jets in t{bar t} 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{prime} {yields} bZ) = 100% and using a leading-order calculation of the b{prime} cross section, b{prime} quark masses below 268 GeV/c2 are excluded at 95% confidence level.

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Research Organization:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC02-07CH11359

OSTI ID:: 919096

Report Number(s):: FERMILAB-PUB-07-261-E; PRVDAQ; arXiv eprint number arXiv:0706.3264; TRN: US0806312

Journal Information:: Phys.Rev.D76:072006,2007, Vol. 76; ISSN 0556-2821

Country of Publication:: United States

Language:: English

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