Search for new particles leading to Z + jets final states in <em>pp</em> collisions at s√=1.96  TeV

CDF Collaboration

doi:10.1103/PhysRevD.76.072006

Scientific article

English

Search for new particles leading to Z + jets final states in pp collisions at s√=1.96 TeV

Contributors

CDF Collaboration

Collaborators

Campanelli, Mario; Clark, Allan Geoffrey; Hamilton, Andrew; Lefevre, Régis; Moed, Shulamit; Sfyrla, Anna; Shreyber, Irina; Vallecorsa, Sofia; Wu, Xin

Published in

Physical review. D. Particles, fields, gravitation, and cosmology, vol. 76, no. 07, 072006

Publication date

2007

Abstract

We present the results of a search for new particles that lead to a Z boson plus jets in pp 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 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.

UNIGE affiliation entities

Faculté des sciences / Section de physique / Département de physique nucléaire et corpusculaire

Citation (ISO format)

CDF Collaboration. Search for new particles leading to Z + jets final states in pp collisions at s√=1.96 TeV. In: Physical review. D. Particles, fields, gravitation, and cosmology, 2007, vol. 76, n° 07, p. 072006. doi: 10.1103/PhysRevD.76.072006

Article (Published version)

Identifiers

PID : unige:38440
DOI : 10.1103/PhysRevD.76.072006

Additional URL for this publication

http://journals.aps.org/prd/abstract/10.1103/PhysRevD.76.072006

Journal ISSN

1550-2368

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252downloads

Creation

03/07/2014 11:11:00

First validation

03/07/2014 11:11:00

Update

13/10/2025 22:34:06

Status update

14/03/2023 21:25:28

Last indexation

10/11/2026 16:58:18