| 4 |
|
The data yields and corresponding MC predictions after this event preselection |
| 5 |
|
are given in Table~\ref{tab:yields}. The MC yields are normalized to~\lumifinal\ using |
| 6 |
|
next-to-leading order (NLO) cross sections. At the current LHC luminosity, the mean |
| 7 |
< |
number of expected pile-up interactions is approximately 5. In the MC, pile-up interactions |
| 7 |
> |
number of interactions in a single beam crossing is approximately 5. In the MC, multiple interactions |
| 8 |
|
are superimposed on the hard collision, and the MC is reweighted such that the distribution |
| 9 |
|
of reconstructed primary vertices matches that in data. As expected, the MC predicts that the |
| 10 |
|
sample passing the preselection is dominated by dilepton $t\bar{t}$. The data yield is in |
| 15 |
|
\begin{center} |
| 16 |
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\caption{\label{tab:yields} Data yields and MC predictions after preselection, using the quoted NLO production cross sections $\sigma$. |
| 17 |
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The \ttll\ corrresponds to dilepton $t\bar{t}$, including |
| 18 |
– |
$t \to W \to \ell$; \tttau\ corresponds to dilepton $t\bar{t}$ in which at least 1 $W$ decays via |
| 18 |
|
$t \to W \to \tau \to \ell$; \ttfake\ includes all other $t\bar{t}$ decay modes. |
| 19 |
|
The samples of MC $t\bar{t}$, $W^{\pm}$ + jets, and single-top events were |
| 20 |
|
generated with \MADGRAPH. The Drell--Yan sample (which includes events with |
| 21 |
|
invariant masses as low as 10\GeVcc) was generated using a mixture of \MADGRAPH\ and |
| 22 |
< |
\PYTHIA and contains decays to the $\tau^+\tau^-$ final state. All other samples were generated with \PYTHIA. |
| 23 |
< |
The LM0 and LM1 benchmark scenarios are defined in the text; the quoted $\sigma$ values refer to the total production |
| 22 |
> |
\PYTHIA and includes decays to the $\tau^+\tau^-$ final state. All other samples were generated with \PYTHIA. |
| 23 |
> |
The LM1 and LM3 benchmark scenarios are defined in the text; the quoted $\sigma$ values refer to the total production |
| 24 |
|
cross section for SUSY particles in these scenarios. Uncertainties are statistical only. |
| 25 |
|
} |
| 26 |
|
\vspace{2 mm} |
| 28 |
|
\hline |
| 29 |
|
Sample & $\sigma$ & $ee$ & $\mu\mu$ & $e\mu$ & total \\ |
| 30 |
|
\hline |
| 31 |
< |
\ttll & X & 120.1 $\pm$ 2.9 &133.1 $\pm$ 2.9 &320.3 $\pm$ 4.6 &573.5 $\pm$ 6.1 \\ |
| 33 |
< |
\tttau & X & 27.5 $\pm$ 1.4 & 33.3 $\pm$ 1.4 & 71.5 $\pm$ 2.2 &132.3 $\pm$ 3.0 \\ |
| 31 |
> |
\ttll & 16.9 & 147.6 $\pm$ 3.2 &166.4 $\pm$ 3.2 &391.7 $\pm$ 5.1 &705.8 $\pm$ 6.8 \\ |
| 32 |
|
\ttfake & 140.6 & 4.5 $\pm$ 0.6 & 1.3 $\pm$ 0.3 & 8.1 $\pm$ 0.7 & 13.9 $\pm$ 1.0 \\ |
| 33 |
|
DY & 18417 & 6.6 $\pm$ 1.8 & 9.5 $\pm$ 2.1 & 13.4 $\pm$ 2.6 & 29.6 $\pm$ 3.8 \\ |
| 34 |
|
\WW & 2.9 & 1.4 $\pm$ 0.2 & 1.5 $\pm$ 0.2 & 3.4 $\pm$ 0.2 & 6.3 $\pm$ 0.3 \\ |
| 42 |
|
data & & 193 & 201 & 485 & 879 \\ |
| 43 |
|
\hline |
| 44 |
|
LM1 & 6.7 & 22.3 $\pm$ 0.6 & 24.8 $\pm$ 0.6 & 12.8 $\pm$ 0.4 & 59.9 $\pm$ 0.9 \\ |
| 45 |
< |
LM3 & X & 5.2 $\pm$ 0.2 & 6.3 $\pm$ 0.2 & 9.0 $\pm$ 0.2 & 20.4 $\pm$ 0.4 \\ |
| 45 |
> |
LM3 & 5.3 & 7.9 $\pm$ 0.3 & 9.6 $\pm$ 0.3 & 14.2 $\pm$ 0.4 & 31.7 $\pm$ 0.6 \\ |
| 46 |
|
\hline |
| 47 |
|
\end{tabular} |
| 48 |
|
\end{center} |
