Alec Aivazis edited background.tex  over 9 years ago

Commit id: dbf512fc80ab2346ceb7a2676abfd1224adbfe2d

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The second biggest background is a two step decay in which a $t$ and a $\overline{t}$ which both decay to the corresponding b-quark and a W-boson which subsequently decays to a muon and its neutrino (to be reffered to as $t\overline{t}$):  $t \overline{t} \rightarrow W^+ W^- b \overline{b} \rightarrow \mu^+ \mu^- b \overline{b} \nu \overline{\nu}$ \overline{\nu} *$  While these two contribute the most to the background signal, there are 6 other proceses which have signatures that can resemble the target decay after taking into consideration fakes and mismeasurements. Those processes are:  \begin{equation}  \begin{split}  WZ & \rightarrow 2 \ell 2 q \\ *\\  & \rightarrow 3 \ell \nu \\ *\\  WW & \rightarrow 2 \ell 2 \nu \\ *\\  ZZ & \rightarrow 4 \ell \\  & \rightarrow 2 \ell 2 \nu \\  & \rightarrow 2 \ell 2 q  \end{split}  \end{equation}  Of these 8 backgrounds,  list backgrounds  there are 8 processes that produce the target signature