Changeset 128 in svn for trunk

Timestamp:

Jan 3, 2009, 7:32:31 PM (16 years ago)

Author:

Xavier Rouby

Message:

chap 3 completed

Location:

trunk/paper

Files:

• notes.pdf (modified) ( previous)
• notes.tex (modified) (1 diff)

trunk/paper/notes.tex

@@ -476 +476 @@
 
 \subsection{Transverse missing energy}
-In an ideal detector, the transverse momentum of the observed final state $p_T^\textrm{obs}$ should be equal to the $p_T$ sum of the invisible particles, written $p_T^\textrm{miss}$.
+In an ideal detector, momentum conservation imposes the transverse momentum of the observed final state $p_T^\textrm{obs}$ to be equal to the $p_T$ sum of the invisible particles, written $p_T^\textrm{miss}$.
 \begin{equation}
  p_T^\textrm{miss} = - p_T^\textrm{obs}
 \end{equation}
-
-the transverse missing energy would simply be computed as the term which balances the transverse momentum sum in the observed event. Its value is then computed as the opposite of the sum of the momentum of all observed particles. In a real experiment, any problem affecting the detector (dead channels, misalignment, noisy towers, cracks) is directly worsening the measured missing transverse energy. In this document, the missing transverse energy (\textcolor{red}{symbol???}) is based on the calorimetric towers and only muons and neutrinos are not taken into account for its evaluation.
+In a real experiment, energy is measured by calorimetry and any problem affecting the detector (dead channels, misalignment, noisy towers, cracks) worsens directly the measured missing transverse energy $E_T^\textrm{miss}$. In this document, missing transverse energy is based on the calorimetric towers and only muons and neutrinos are not taken into account for its evaluation:
+\begin{equation}
+ E_T^\textrm{miss} = - \sum^\textrm{towers}_i E_T(i)
+\end{equation}
 
 \section{Trigger emulation}