AIDA-MS14

AIDAAdvanced European Infrastructures for Detectors at Accelerators

Milestone Report

Integration of tracking toolkit into LCsoftware framework

Gaede, F. (DESY/CERN)

29 January 2015

The research leading to these results has received funding from the European Commissionunder the FP7 Research Infrastructures project AIDA, grant agreement no. 262025.

This work is part of AIDA Work Package 2: Common software tools.

The electronic version of this AIDA Publication is available via the AIDA web site<http://cern.ch/aida> or on the CERN Document Server at the following URL:

<http://cds.cern.ch/search?p=AIDA-MS14>

AIDA-MS14

Copyright © AIDA Consortium, 2015

Grant Agreement 262025 PUBLIC 1 / 5

Grant Agreement No: 262025

AIDA Advanced European Infrastructures for Detectors at Accelerators

Seventh Framework Programme, Capaci t ies Spec i f ic Programme, Research In f rast ructu res,

Combinat ion of Col laborat ive Pro ject and Coord inat ion and Support Act ion

MILESTONE REPORT

INTEGRATION OF TRACKING TOOLKIT

INTO LC SOFTWARE FRAMEWORK MILESTONE: MS14

Document identifier: AIDA-Mil-MS14

Due date of milestone: End of Month 44 (September 2014)

Report release date: 29/01/2015

Work package: WP2 Common software tools

Lead beneficiary: DESY

Document status: Final

Abstract:

A generic, mostly framework independent, tracking toolkit has been developed in WP2. It

consists of tools for track seeding, pattern recognition and track fitting. An interface to the

geometry description tool DD4hep, that was also developed in WP2 is provided and is based

on the definition of measurement surface with material properties. The tracking tools have

been developed in the context of the ILD detector concept and are now fully integrated in the

iLCSoft framework used by ILC and CLIC.

INTEGRATION OF TRACKING TOOLKIT INTO LC

SOFTWARE FRAMEWORK Date: 29/01/2015

Grant Agreement 262025 PUBLIC 2 / 5

Copyright notice:

Copyright © AIDA Consortium, 2015

For more information on AIDA, its partners and contributors please see www.cern.ch/AIDA

The Advanced European Infrastructures for Detectors at Accelerators (AIDA) is a project co-funded by the

European Commission under FP7 Research Infrastructures, grant agreement no 262025. AIDA began in

February 2011 and will run for 4 years.

The information herein only reflects the views of its authors and not those of the European Commission and no

warranty expressed or implied is made with regard to such information or its use.

Delivery Slip

Name Partner Date

Authored by Frank Gaede DESY/CERN 27/01/2015

Edited by Frank Gaede DESY/CERN 27/01/2015

Reviewed by L. Serin [Scientific coordinator] CNRS 28/01/2015

Approved by L. Serin [Scientific coordinator] 29/01/2015

INTEGRATION OF TRACKING TOOLKIT INTO LC

SOFTWARE FRAMEWORK Date: 29/01/2015

Grant Agreement 262025 PUBLIC 3 / 5

1 TRACKING TOOLS IN TASK WP2.3: RECONSTRUCTION TOOLKIT FOR HEP

1.1 INTEGRATION IN LC SOFTWARE

The tracking tools are described in more detail in [1]. They were mostly developed in the

context of the ILD detector concept for the ILC which ensured a tight integration with the

iLCSoft framework already at the time of the development. In order to allow for an

independent development of pattern recognition and track fitting tools, an abstract interface,

called IMarlinTrk, was designed at the beginning of the project. This interface provides the

basis for a very modular, component based approach.

Figure 1: Schematic view of tracking tools in the LC software framework. The abstract IMarlinTrk interface

separates pattern recognition and track fitting tools, ensuring a modular component based design.

It allowed the development of pattern recognition tools for the TPC and Forward Tracking

Discs (FTD) of ILD in the first half of the project, using a pre-existing fitter and geometry

description tool, while in parallel work was carried out on the aidaTT track fitting and the

DDRec interface to DD4hep [2]. At the end of the AIDA project all components have been

fully integrated as shown in Figure 1.

1.2 PERFORMANCE OF TRACKING TOOLS

The performance of the pattern recognition tools was already demonstrated two years ago into

the project, when they were used for a massive Monte Carlo production for the Detailed

Baseline Design Report (DBD) of ILD [3]. The track finding efficiency for the full ILD

tracking software, which is too a large extent based on the tools developed in AIDA, is shown

in Figure 2. In order to test the new track fitting tools and the interface to the detector

geometry description DDRec, single muons at 5 GeV have been simulated in the new

simulation model of ILD based on DD4hep [1] and fully reconstructed using the new tracking

tools. The pull distributions for the perigee track parameters (, tan(, , d0, z0) are shown

in Figure 3. All distributions have a mean value of 0 and widths close to 1, validating the

complete software chain including the material description in the simulation model.

INTEGRATION OF TRACKING TOOLKIT INTO LC

SOFTWARE FRAMEWORK Date: 29/01/2015

Grant Agreement 262025 PUBLIC 4 / 5

Figure 2: Track finding efficiency for prompt tracks in ttbar events at the ILC with 500GeV and 1 TeV center of

mass energy respectively; left: as a function of momentum, middle: as a function of cos().

Figure 3: Pull distribution for the perigee track parameters (, tan(, , d0, z0) used in the ILC tracking

software for the Vertex detector and intermediate silicon tracker of ILD using the new DD4hep based ILD

simulation model [2], the DDRec interface and the DDKalTest based Kalman Filter[1].

INTEGRATION OF TRACKING TOOLKIT INTO LC

SOFTWARE FRAMEWORK Date: 29/01/2015

Grant Agreement 262025 PUBLIC 5 / 5

2 REFERENCES

[1] F. Gaede et al., AIDA Delivery Report D2.8, “Software Toolkit with Tracking

Algorithms”.

[2] P. Mato et al., AIDA Delivery Report D2.7, “Software Toolkit for Detector Geometry,

Materials and Detection Technologies”.

[3] Behnke, T., et al. (2013) “ILC Technical Design Report, Volume 4: Detectors”,

arXiv:1306.6329, ILC-REPORT-2013-040.