| 1 |
benhoob |
1.1 |
\section{Limits on New Physics}
|
| 2 |
|
|
\label{sec:limit}
|
| 3 |
|
|
|
| 4 |
benhoob |
1.5 |
We set an upper limit on the signal yield extracted by the fit to the dilepton mass
|
| 5 |
benhoob |
1.4 |
distribution, assuming the LM1 shape. The 95\% confidence level (CL) upper limit (UL)
|
| 6 |
nmohr |
1.7 |
is extracted using a profile likelihood technique, giving an UL of 14.3 events, including
|
| 7 |
|
|
uncertainties in the background yield and shape, resolution model and $Z$ yield.
|
| 8 |
|
|
In the limit setting we also include the uncertainties from trigger efficiency,
|
| 9 |
|
|
lepton selection efficiency, hadronic energy scale and integrated luminosity on the signal efficiency.
|
| 10 |
nmohr |
1.9 |
The expected LM1 yield is 23 $\pm$ 2 events.
|
| 11 |
benhoob |
1.4 |
|
| 12 |
benhoob |
1.5 |
We set upper limits on the non-SM contributions to the high \MET\ and high \Ht\ signal regions.
|
| 13 |
benhoob |
1.12 |
For both regions, we find reasonable agreement between the observed yields and the predictions from MC and from the ABCD' and \ptll\
|
| 14 |
benhoob |
1.2 |
data-driven methods. We choose here to extract the upper limits using the MC prediction for the
|
| 15 |
|
|
background estimate. The 95\% CL upper limit is extracted using a Bayesian technique~\cite{ref:cl95cms},
|
| 16 |
benhoob |
1.11 |
with a log-normal model of nuissance parameter integration assuming 0 signal efficiency uncertainty.
|
| 17 |
benhoob |
1.12 |
The results are summarized in Table~\ref{tab:results}.
|
| 18 |
|
|
|
| 19 |
|
|
The results of the opposite-flavor subtraction are summarized in Table~\ref{tab:ofresults}.
|
| 20 |
benhoob |
1.13 |
We set a Bayesian 95\% CL upper limit on the quantity $\Delta$ and compare this to the predicted
|
| 21 |
|
|
values in the LM1 and LM3 scenarios.
|
| 22 |
benhoob |
1.12 |
|
| 23 |
benhoob |
1.1 |
|
| 24 |
benhoob |
1.2 |
\begin{table}[hbt]
|
| 25 |
benhoob |
1.1 |
\begin{center}
|
| 26 |
benhoob |
1.2 |
\caption{\label{tab:results}
|
| 27 |
benhoob |
1.8 |
Summary of the observed and predicted yields in the 2 signal regions. The uncertainty in the MC prediction is statistical only.
|
| 28 |
benhoob |
1.5 |
The systematic uncertainties on the ABCD', \ptll, and OF subtraction predictions are discussed in the text. The non-SM yield UL is a
|
| 29 |
benhoob |
1.10 |
Bayesian 95\% confidence level upper limit. The LM1 and LM3 yields include uncertainties from MC statistics, trigger efficiency,
|
| 30 |
benhoob |
1.5 |
lepton selection efficiency, hadronic energy scale and integrated luminosity.
|
| 31 |
benhoob |
1.1 |
}
|
| 32 |
benhoob |
1.13 |
\begin{tabular}{l|c|c}
|
| 33 |
benhoob |
1.2 |
\hline
|
| 34 |
|
|
& high \met\ signal region & high \Ht\ signal region \\
|
| 35 |
|
|
\hline
|
| 36 |
benhoob |
1.13 |
observed yield & 4 & 3 \\
|
| 37 |
benhoob |
1.2 |
\hline
|
| 38 |
|
|
MC prediction & 2.6 $\pm$ 0.8 & 2.5 $\pm$ 0.8 \\
|
| 39 |
|
|
ABCD' prediction & 1.2 $\pm$ 0.4 (stat) $\pm$ 0.5 (syst) & 0.0 $\pm$ 0.6 (stat) $\pm$ 0.3 (syst) \\
|
| 40 |
|
|
\ptll\ prediction & 5.4 $\pm$ 3.8 (stat) $\pm$ 2.2 (syst) & 1.7 $\pm$ 1.7 (stat) $\pm$ 0.6 (syst) \\
|
| 41 |
benhoob |
1.11 |
non-SM yield UL & 6.9 & 5.8 \\
|
| 42 |
benhoob |
1.8 |
LM1 yield & 17 $\pm$ 2.5 & 14 $\pm$ 2.9 \\
|
| 43 |
|
|
LM3 yield & 6.4 $\pm$ 1.2 & 6.7 $\pm$ 1.5 \\
|
| 44 |
benhoob |
1.2 |
\hline
|
| 45 |
benhoob |
1.12 |
\end{tabular}
|
| 46 |
|
|
\end{center}
|
| 47 |
|
|
\end{table}
|
| 48 |
|
|
|
| 49 |
|
|
|
| 50 |
|
|
\begin{table}[hbt]
|
| 51 |
|
|
\begin{center}
|
| 52 |
|
|
\caption{\label{tab:ofresults}
|
| 53 |
|
|
Summary of the opposite-flavor subtraction results. The quantity $\Delta$ is defined in Eq.~\ref{eq:ofhighpt}.
|
| 54 |
|
|
The Bayesian 95\% CL upper limit on this quantity, as well as the predicted values in the LM1 and LM3 scenarios,
|
| 55 |
benhoob |
1.13 |
are also summarized. The LM1 and LM3 uncertainties are from MC statistics, trigger efficiency,
|
| 56 |
|
|
lepton selection efficiency, hadronic energy scale and integrated luminosity.
|
| 57 |
benhoob |
1.12 |
}
|
| 58 |
benhoob |
1.13 |
\begin{tabular}{l|c|c}
|
| 59 |
|
|
\hline
|
| 60 |
benhoob |
1.14 |
& high \met\ signal region & high \Ht\ signal region \\
|
| 61 |
benhoob |
1.12 |
\hline
|
| 62 |
|
|
observed $\Delta$ & 1.3 $\pm$ 1.9 (stat) $\pm$ 0.5 (syst) & 0.1 $\pm$ 1.5 (stat) $\pm$ 0.5 (syst) \\
|
| 63 |
|
|
\hline
|
| 64 |
benhoob |
1.14 |
UL & 4.0 & 2.7 \\
|
| 65 |
benhoob |
1.12 |
LM1 & 9.6 $\pm$ 1.4 & 8.5 $\pm$ 1.8 \\
|
| 66 |
|
|
LM3 & 1.2 $\pm$ 0.4 & 1.2 $\pm$ 0.4 \\
|
| 67 |
benhoob |
1.2 |
\hline
|
| 68 |
|
|
\end{tabular}
|
| 69 |
benhoob |
1.1 |
\end{center}
|
| 70 |
benhoob |
1.2 |
\end{table}
|
