Speakers
Prof.
Shahram Rahatlou
(Univ di Roma La Sapienza)Dr
Tommaso Boccali
(INFN Sezione di Pisa)
Description
At the end of 2007 the first colliding beams from LHC are expected. The CMS Computing
model enforces the use of the same software (with different performance settings) for
offline and online(HLT) operations; this is particularly true for the reconstruction
software: the different settings must allow a processing time per event
(typically, numbers for 2x10e33 luminosity are given) of 50 ms at HLT, while 25 sec
are allowed for the offline reconstruction. During 2006 CSA06 data challenge the
focus has been put on the offline reprocessing. The reconstruction software has
substantially improved from the end-of-2005 version, which was able to process only
local reconstruction, to a full fledged reconstruction program,
with high level objects ready for analysis tasks (electrons, jets, muons, b/tau
tagged jets). The same software is also ready to process a non-ideal detector, and
takes into account hardware inefficiencies and misalignments. This second mode of
operation, which is important for the readiness of data taking, has been tested in
CMS slice tests and commissioning tasks, and has shown that the algorithms used for
MonteCarlo processeing are well suited to real-world tasks. During 2007, a second
data challenge will explore online/offline reconstruction, and will be used as the
base for the ready-for-beam demonstration.
Summary
The CMS Reconstruction software is described, pointing out current performance and
future developments towards data taking.
| Submitted on behalf of Collaboration (ex, BaBar, ATLAS) | CMS |
|---|
Authors
Prof.
Shahram Rahatlou
(Univ di Roma La Sapienza)
Dr
Tommaso Boccali
(INFN Sezione di Pisa)
