Eur. Phys. J. C (2006) 46: 45-56
https://doi.org/10.1140/epjcd/s2006-02-004-8

Scientific Note

Measurement of missing transverse energy with the CMS detector at the LHC

¹ University of Florida, Gainesville, FL, 32601, USA
² Fermi National Accelerator Laboratory, Batavia, IL, 60510, USA
³ Boston University, Boston, MA, 02215, USA
⁴ Princeton University, Princeton, NJ, 08544, USA

^* e-mail: rohlf@bu.edu

Received: 14 March 2006
Revised: 29 April 2006
Published online: 27 June 2006

Abstract

The performance of the Compact Muon Solenoid detector for measuring missing transverse energy is evaluated using fully simulated pp collisions at a center-of-mass energy of 14 TeV at the Large Hadron Collider. For minimum bias events without pileup, a resolution of 6.1 GeV is computed, corresponding to a stochastic contribution of , where ΣE_T is the summed transverse energy in all calorimeter towers. When the contribution of pileup is included, the resolution degrades according to the overall deposited ΣE_T with the same stochastic coefficient. For QCD dijet events with event pileup corresponding to a luminosity , we compute resulting in a resolution of 45 GeV for jet events with reconstructed transverse momentum of 800 GeV/c. Monte Carlo samples of tt̄ and W+jet events with high-momentum (p_T>20 GeV/c) lepton decays leading to true missing transverse energy were used to determine the azimuthal angle resolution to be 0.1 radians (0.2 radians) for a reconstructed missing transverse energy of 200 GeV (100 GeV).