Search for high mass resonances decaying to mu+ mu- at CDF

D. Whiteson1, K. Cranmer 2, E. Quinlan1, A. Kotwal3,C. Hays4,O. Stelzer-Chilton5

1 University of California, Irvine
2 New York University
3 Duke 4 Oxford 5 TRIUMF
CDF Collaboration

Email authors

Abstract


We present a search for a new high-mass resonance decaying to $\mu^+\mu^- + X $, using a matrix-element-based likelihood and a simultaneous measurement of the mass and rate. We see no significant excess; the best fit point is $M_{Z'} = 199$ GeV, with 1.3\% signal fraction, consistent with the standard model. We place limits on a set of $Z'$ models, including $M > 1071$ GeV for a standard-model-like $Z'$.

conference note


Plots & Tables

Expected standard model background and observed events.

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Fractional difference between observed and expected standard model background.
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Kinematics of Z' signal events.pdf/ eps
Kinematics of Z' signal events.pdf/ eps
Acceptance for Z' events as a function of pole mass.pdf/ eps
Observed and expected 95% C.L. upper limit on the cross-section as a function of pole mass.pdf/ eps
Observed 95% C.L. upper limit and predicted cross-sections for a variety of Z' theories. pdf/ eps
Observed 95% C.L. upper limit and predicted cross-sections for a variety of Z' theories. pdf/ eps
CDF Run II Preliminary 4.6 inverse fb
Observed 95% C.L. lower limits on the Z' mass in several theories. pdf/ eps
Observed 95% C.L. upper limit and predicted cross-sections Z'_{F'} theory. pdf/ eps
Best-fit point and several C.L. regions pdf/ eps
Likelihood in data pdf/ eps
Example likelihoods from pseudo-experiments with mZ' = 1 TeVpdf/ eps
Example likelihoods from pseudo-experiments with mZ' = 300 GeVpdf/ eps
Example likelihoods from pseudo-experiments with mZ' = 500 GeVpdf/ eps
Example likelihoods from pseudo-experiments with mZ' = 700 GeVpdf/ eps
Example likelihoods from pseudo-experiments with no signal.pdf/ eps
COT view of highest mass event.pdf/ eps
LEGO view of highest mass event.pdf/ eps
RZ view of highest mass event.pdf/ eps