10 MUONS

The goal of this task is twofold: 
the development and integration in the CMS software environment of the simulation,
reconstruction and analysis tools needed to fully exploit the capabilities of the CMS
experiment in producing physics results using muons in the event final state;  
the detailed study of these capabilities and the definition of the strategies to 
obtain the optimal response in the various physics channels of interest, in close 
coordination with the other PRS tasks dealing with different physics objects.

10.1 Muon Detector Simulation

This item cover the simulation issues specific to the muon sub-systems, assuring the 
implementation and integration of the relevant code in the OSCAR simulation program.
In particular, the proper simulation in the GEANT4 framework of the physics processes 
involved in the muon detection, including multiple scattering, muon showering and 
delta-ray production, neutron background parameterization and punchtrhough effects, 
must be cross-checked against test-beam available data and already existing GEANT3 
simulation results. The existing muon digitization code presently developed in the 
ORCA framework will also be included in the OSCAR program.

10.2 Muon Detector  Reconstruction

This item cover the reconstrution issues specific to the muon sub-systems, assuring 
the implementation and integration of the relevant code in the ORCA  program.
In particular the maintenance of already existing hit reconstruction, L1 trigger 
simulation and local track reconstruction code in the Drift Tubes, RPC and CSC muon 
systems must be guaranteed, as well as further developments  to improve the code 
performance and to allow transparent usage of the code at the following stages of 
the reconstruction, including integration with other detectors and studies of 
alignment and calibration issues.

10.3 Muon Detector Alignment, Calibration and Databases

The aim of this sub-task is the development of the software tools needed for the 
alignment and calibration studies in the muon system. In particular, the interface 
of existing muon alignment software with  the ORCA  reconstruction, together with the
 development of general software tools to displace/rotate in ORCA the muon subdetector
 units, is mandatory to study mis-alignment effects at different 
reconstruction/selection stages (L1 trigger, HLT, off-line) , to link the muon and 
the tracker alignment systems and to develop strategies for aligment corrections 
using the event data.  As far as calibration is concerned, the simulation of realistic 
trigger syncronization data and specific behaviour of electronic-channels  to be 
recorded in the Calibration Database must be provided, and strategies for calibration
 updating using event data must be studied.
Finally, tools for converting the existing geometry detector database developed within 
CMSIM  to a GENT4/OSCAR format, including recent and possible future updates, also  
from engineer drawings, must be developed.

10.4 Muon Test Beams and Monitoring

This item has to provide and mantain transparent and user-friendly interface of muon 
test-beam data to the event object database of CMS, allowing the usage of reconstruction
 code developed in the ORCA framework in the test-beam analysis activities. Tools 
for online software (e.g. event monitoring)  and forthcoming  combined test-beam 
activities (e.g DT+RPC , CSC+RPC) must be provided as well. 

10.5 Muon Physics Objects
 
The goals of this sub-task  are the muon identification at the different stages of the 
reconstruction and event selection (L2 and L3 triggers, off line), the definition of 
algorithms to identify and select interesting events for the different Physics 
channels with muon(s) in the final state, the development of  benchmark physics 
analyses using the full detector simulation and reconstruction chain developed in 
the OSCAR and ORCA frameworks.  Tools for common issues with other sub-detectors 
(e.g. muon-tracker matching, energy isolation algorithms, minimum ionizing particle 
definition) must be developed  in close collaboration with other PRS groups. The 
setting-up of Monte Carlo productions, including the configuration of MC generators  
and the definition of relevant samples needed for bacgkround rejection and benchmark 
signal studies, is a crucial part of  this  sub-task activity.