| 1 |
|
\section{Interpretation} |
| 2 |
+ |
\label{sec:interpretation} |
| 3 |
|
|
| 4 |
< |
The results of this search will be interpreted in the context of simplified model spectra (SMS). |
| 5 |
< |
For the inclusive analysis, we will use the T5zz model depicted in Fig.~\ref{fig:diagrams} (left). |
| 6 |
< |
For the targeted analysis, we will use the TChiWZ model depicted in Fig.~\ref{fig:diagrams} (right), |
| 7 |
< |
and a GMSB model which produces a signature of \zzmet. |
| 4 |
> |
In this section, we interpret the results of the targeted search in the context of the \wzmet\ model depicted in Fig.~\ref{fig:diagrams} (right) |
| 5 |
> |
and a gauge-mediated SUSY breaking (GMSB) model that produces a signature of \zzmet\ will be added. The results of the targeted search presented here |
| 6 |
> |
will be combined with those of the trilepton ewkino search for the final \wzmet\ interpretation, and with the quadlepton ewkino search |
| 7 |
> |
for the final GMSB \zzmet\ interpretation. |
| 8 |
> |
|
| 9 |
> |
The exclusion is performed using the results of simultaneous counting experiments in the five exclusive \MET\ signal regions defined by \MET\ $>$ 80 GeV, |
| 10 |
> |
as summarized in Table~\ref{tab:results_targ} (commonly referred to as a ``shape analysis''). |
| 11 |
> |
The upper limit calculation is performed with the LandS software using the LHC-type CLs criterion. |
| 12 |
> |
The signal efficiency uncertainties include the luminosity (4.4\%), acceptance for the b-jet veto (4\%), lepton ID and isolation efficiency (2\% per lepton), |
| 13 |
> |
and trigger efficiency (3\%). The uncertainty from JES is determined following the POG-recommended procedure, by varying the jet energies by the |
| 14 |
> |
\pt- and $\eta$-dependent uncertainties and propagating this to the jet multiplicity, dijet mass, and \MET. |
| 15 |
> |
The background uncertainties are quoted in Table~\ref{tab:results_targ}. For each background contribution, the uncertainty is assumed to be 100\% |
| 16 |
> |
correlated across all signal regions. |
| 17 |
> |
|
| 18 |
> |
For the \wzmet\ model, the signal efficiency times acceptance and cross section upper limits are displayed in Fig.~\ref{fig:results_wzmet}, |
| 19 |
> |
along with the observed and expected exclusion contours, which are compared to the 2011 observed exclusion contour. |
| 20 |
> |
Figure~\ref{fig:results_wzmetpoints} shows the excluded points used to derive the exclusion contours. We note that the map of exclusion |
| 21 |
> |
contours appears quite ragged since for many of the points the cross section upper limit is very close to the theory cross section. |
| 22 |
> |
Therefore we do not expect the ragged exclusion region to be an issue for the final results since |
| 23 |
> |
we currently have 9.2 fb$^{-1}$ and expect the luminosity to increase significantly. A {\bf VERY APPROXIMATE} projection of the expected excluded region |
| 24 |
> |
for an integrated luminosity of 15 fb$^{-1}$ (a rough guess at the final HCP data sample) is obtained by scaling the expected cross section limits by |
| 25 |
> |
$\sqrt{(9.2 \rm{fb}^{-1})/(15 \rm{fb}^{-1})}$, as displayed in Fig.~\ref{fig:results_15fb}. |
| 26 |
> |
|
| 27 |
> |
\begin{figure}[!ht] |
| 28 |
> |
\begin{center} |
| 29 |
> |
\begin{tabular}{cc} |
| 30 |
> |
\includegraphics[width=0.45\textwidth]{plots/wzsms_eff.pdf} |
| 31 |
> |
\includegraphics[width=0.45\textwidth]{plots/wzsms_xsec.pdf} |
| 32 |
> |
\end{tabular} |
| 33 |
> |
\caption{ Interpretation of the targeted analysis in the \wzmet\ model. The acceptance times efficiency (left) and cross section |
| 34 |
> |
upper limit (right) are displayed. The observed and expected exclusion contours are indicated and compared to the observed |
| 35 |
> |
exclusion from the 2011 analysis. |
| 36 |
> |
%\newline |
| 37 |
> |
%Interpretation of the $\rm{Z}+\rm{dijet}$ analysis in the \wzmet\ model of Fig.~2(a). |
| 38 |
> |
%The shading indicates the cross section upper limit. The observed and expected exclusion contours are indicated and compared to the observed |
| 39 |
> |
%exclusion from the 2011 analysis. The region below the contours is excluded at 95\% confidence level. |
| 40 |
> |
\label{fig:results_wzmet}} |
| 41 |
> |
\end{center} |
| 42 |
> |
\end{figure} |
| 43 |
> |
|
| 44 |
> |
\begin{figure}[!hb] |
| 45 |
> |
\begin{center} |
| 46 |
> |
\includegraphics[width=0.75\textwidth]{plots/wzsms_points.pdf} |
| 47 |
> |
\caption{ Observed (left) and expected (right) excluded points for the \wzmet\ interpretation, with the corresponding exclusion contours overlaid. |
| 48 |
> |
\label{fig:results_wzmetpoints}} |
| 49 |
> |
\end{center} |
| 50 |
> |
\end{figure} |
| 51 |
> |
|
| 52 |
> |
\clearpage |
| 53 |
> |
|
| 54 |
> |
\begin{figure}[!ht] |
| 55 |
> |
\begin{center} |
| 56 |
> |
\includegraphics[width=0.5\textwidth]{plots/wzsms_expected_15fb.pdf} |
| 57 |
> |
\caption{ A {\bf VERY APPROXIMATE} projection of the expected excluded points for an integrated luminosity of 15$^{-1}$. |
| 58 |
> |
\label{fig:results_15fb}} |
| 59 |
> |
\end{center} |
| 60 |
> |
\end{figure} |
| 61 |
> |
|
| 62 |
> |
The results of the interpretation in the GMSB \zzmet\ model are displayed in Fig.~\ref{fig:results_gmsb}, |
| 63 |
> |
as a function of the chargino and neutralino mass parameter $\mu$. These results exclude the range $196 < \mu < 316$~GeV. |
| 64 |
> |
|
| 65 |
> |
\begin{figure}[!hb] |
| 66 |
> |
\begin{center} |
| 67 |
> |
\includegraphics[width=0.5\textwidth]{plots/ZDIJET_GMSB.pdf} |
| 68 |
> |
\caption{ Interpretation of the targeted analysis in the GMSB \zzmet\ model. |
| 69 |
> |
%\newline |
| 70 |
> |
%Interpretation of the $\rm{Z}+\rm{dijet}$ analysis in the GMSB model discussed in the text. |
| 71 |
> |
%The observed and expected cross section upper limits are indicated as a function of the mass parameter $\mu$, and are compared to the theory |
| 72 |
> |
%cross section. The region $196 < \mu < 316$~GeV is excluded at 95\% confidence level. |
| 73 |
> |
\label{fig:results_gmsb}} |
| 74 |
> |
\end{center} |
| 75 |
> |
\end{figure} |
| 76 |
> |
|
| 77 |
> |
|
| 78 |
> |
|
| 79 |
> |
\begin{table}[htb] |
| 80 |
> |
\begin{center} |
| 81 |
> |
\footnotesize |
| 82 |
> |
\caption{\label{tab:gmsb} Summary of the parameters for the GMSB model used for the \zzmet\ interpretation. |
| 83 |
> |
The masses of the lightest and second light neutralino, lightest chargino, and total next-to-leading order |
| 84 |
> |
cross section, are indicated.} |
| 85 |
> |
\begin{tabular}{l|cccc} |
| 86 |
> |
\hline |
| 87 |
> |
\hline |
| 88 |
> |
$\mu$ [GeV] & $m_{\chizi}$ [GeV] & $m_{\chizii}$ [GeV] & $m_{\chipm}$ [GeV] & $\sigma_{\mathrm{NLO}}$ [pb] \\ |
| 89 |
> |
%$\mu$ [GeV] & $m_{\chizi}$ [GeV] & & & \\ |
| 90 |
> |
\hline |
| 91 |
> |
%110 & 102 & 111 & 104 & 7.3 \\ |
| 92 |
> |
130 & 122 & 131 & 124 & 3.8 \\ |
| 93 |
> |
150 & 141 & 151 & 144 & 2.1 \\ |
| 94 |
> |
170 & 161 & 171 & 164 & 1.3 \\ |
| 95 |
> |
190 & 181 & 191 & 184 & 0.84 \\ |
| 96 |
> |
210 & 201 & 211 & 203 & 0.56 \\ |
| 97 |
> |
230 & 221 & 231 & 223 & 0.38 \\ |
| 98 |
> |
250 & 240 & 251 & 243 & 0.27 \\ |
| 99 |
> |
270 & 260 & 271 & 263 & 0.20 \\ |
| 100 |
> |
290 & 280 & 291 & 283 & 0.14 \\ |
| 101 |
> |
310 & 299 & 311 & 302 & 0.11 \\ |
| 102 |
> |
330 & 319 & 331 & 322 & 0.080 \\ |
| 103 |
> |
350 & 339 & 351 & 342 & 0.061 \\ |
| 104 |
> |
370 & 358 & 371 & 362 & 0.047 \\ |
| 105 |
> |
390 & 378 & 391 & 381 & 0.037 \\ |
| 106 |
> |
410 & 398 & 411 & 401 & 0.029 \\ |
| 107 |
> |
\hline |
| 108 |
> |
\hline |
| 109 |
> |
\end{tabular} |
| 110 |
> |
\end{center} |
| 111 |
> |
\end{table} |
