Oct 10 – 14, 2016
San Francisco Marriott Marquis
America/Los_Angeles timezone

Impact of tracker layout on track reconstruction in pp collisions with high pileup at CMS.

Oct 13, 2016, 3:30 PM
1h 15m
San Francisco Marriott Marquis

San Francisco Marriott Marquis

Poster Track 2: Offline Computing Posters B / Break


Slava Krutelyov (Univ. of California San Diego (US))


High luminosity operations of the LHC are expected to deliver
proton-proton collisions to experiments with average number of pp
interactions reaching 200 every bunch crossing.
Reconstruction of charged particle tracks in this environment is
computationally challenging.

At CMS, charged particle tracking in the outer silicon tracker detector
is among the largest contributors to the overall CPU budget of the tracking.
Expected costs of the tracking detector upgrades are comparable to that
of the computing costs associated with the track reconstruction.
We explore potential gains that could be achieved for tracking
computational costs for a range of realistic changes in the tracker

A layout with grouped layers placed at shorter distance than the
traditional equidistant layer separation
shows potential benefits in several aspects:
increase in locality of track reconstruction up to track segments
measured on these layer groups and reduction of combinatorial backgrounds.
A simplified detector layout emulation based on CMS upgrade tracker
detector simulation is used to quantify dependence of tracking
computational performance for different detector layouts.

Primary Keyword (Mandatory) Reconstruction

Primary author

Slava Krutelyov (Univ. of California San Diego (US))


Avi Yagil (Univ. of California San Diego (US)) Frank Wuerthwein (Univ. of California San Diego (US)) Giuseppe Cerati (Univ. of California San Diego (US)) Matevz Tadel (Univ. of California San Diego (US))

Presentation materials