We present the results of a search for new particles that lead to a Z boson plus jets in p (p) over bar collisions at root 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 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 multijet environments, as shown when validating the method by predicting the background from W + jets in t (t) over bar 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/c(2) are excluded at 95% confidence level.

T., A., A., A., J., A., T., A., T., A., M. G., A., et al. (2007). Search for new particles leading to Z + jets final states in p(p)over-bar collisions at root s=1.96 TeV. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 76(7), 072006-1-072006-24 [10.1103/PhysRevD.76.072006].

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

CIOCCI, MARIA AGNESE;
2007-01-01

Abstract

We present the results of a search for new particles that lead to a Z boson plus jets in p (p) over bar collisions at root 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 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 multijet environments, as shown when validating the method by predicting the background from W + jets in t (t) over bar 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/c(2) are excluded at 95% confidence level.
2007
T., A., A., A., J., A., T., A., T., A., M. G., A., et al. (2007). Search for new particles leading to Z + jets final states in p(p)over-bar collisions at root s=1.96 TeV. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 76(7), 072006-1-072006-24 [10.1103/PhysRevD.76.072006].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/36215
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