- Timestamp:
- Jan 3, 2009, 7:32:31 PM (16 years ago)
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- trunk/paper
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trunk/paper/notes.tex
r121 r128 476 476 477 477 \subsection{Transverse missing energy} 478 In an ideal detector, the transverse momentum of the observed final state $p_T^\textrm{obs}$ shouldbe equal to the $p_T$ sum of the invisible particles, written $p_T^\textrm{miss}$.478 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 $p_T^\textrm{miss}$. 479 479 \begin{equation} 480 480 p_T^\textrm{miss} = - p_T^\textrm{obs} 481 481 \end{equation} 482 483 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. 482 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: 483 \begin{equation} 484 E_T^\textrm{miss} = - \sum^\textrm{towers}_i E_T(i) 485 \end{equation} 484 486 485 487 \section{Trigger emulation}
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