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Delphes
A framework for fast simulation of a generic collider experiment
Delphes is a C++ framework, performing a fast multipurpose detector response simulation. The simulation includes a tracking system, embedded into a magnetic field, calorimeters and a muon system. The framework is interfaced to standard file formats (e.g. Les Houches Event File or HepMC) and outputs observables such as isolated leptons, missing transverse energy and collection of jets which can be used for dedicated analyses. The simulation of the detector response takes into account the effect of magnetic field, the granularity of the calorimeters and subdetector resolutions. Visualisation of the final state particles is also built-in using the corresponding ROOT library.
NEW Delphes 3 stable release (February 26)
Following the guidelines and suggestions of the 2012 LPCC workshop on public fast simulators for the LHC, Delphes has been completely redesigned to meet the needs of all users.
Improvements include:
- Modular structure allowing users to introduce new features easily and modify existing ones
- Library mode to use Delphes inside other programs
- Simulation speed has been improved
- Input libraries have been rewritten from scratch to handle standard formats, files stored on castor or on the web
- Many existing features have been updated
- Important number of bug fixes
The modular system allows you to:
- define your own output collections, store multiple object collections (different jet algorithms, etc.)
- define the isolation criteria for each type of object
- define efficiency and resolution formulas for all objects
- change the b-tagging and tau-tagging efficiency and misidentification rate
- and much more! Be sure to read the online documentation
Production version 3.0.6:
- fixed filtering of the partons used for b- and tau-tagging (#163)
- fixed the problems with artefacts in jet eta distribution (#169)
- fixed direction of MissingET (#170)
- modified DelphesFormula to filter out the end-of-line characters
- added TrackPileUpSubtractor to fix the problem with the charged pile-up particles outside of the tracker coverage
- added ConstituentFilter module
- added StatusPidFilter module
- added hepmc2pileup and stdhep2pileup converters
Download here: Delphes 3.0.6
Documentation: Delphes 3 user guide
Community and support
Delphes is now moving to community-based development. The branches of the subversion repository are open to users who would like to participate. If you are interested, register first and then contact the support team via cp3-delphes@… to be granted write access to the subversion repository.
SVN access
You can get the latest version of the code using:
svn checkout https://cp3.irmp.ucl.ac.be/sources/delphes/trunk
Registered developers can checkout and commit in branches using their credentials:
svn checkout --username=my_user_name https://cp3.irmp.ucl.ac.be/sources/delphes/branches/my_branch
Latest tickets
Results (1 - 10 of 867)
| Ticket | Resolution | Summary | Owner | Reporter | Status | Priority | Created |
|---|---|---|---|---|---|---|---|
| #1598 | Question on PDG code = 0 on B-tagging module | new | minor | 6 months | |||
| #1597 | Inquiry Regarding Particle Status in Delphes | new | minor | 7 months | |||
| #1596 | Meaning of Delphes “Track” outputs | new | minor | 7 months | |||
| #1595 | eFlowTracks for some dark matter particles | new | minor | 7 months | |||
| #1594 | Jet matching with Pythia 8.3 | new | minor | 8 months | |||
| #1593 | Replicating fatjet clustering with pyjet | new | major | 9 months | |||
| #1592 | Reading Delphes files with uproot ("fBits is not always 4 bytes") | new | minor | 9 months | |||
| #1591 | Weird tracks' momenta for smeared tracks after SimpleCalorimeter module | new | critical | 9 months | |||
| #1590 | fixed | Running Delphes on lxplus9 | closed | minor | 9 months | ||
| #1589 | Delphes Installation doesn't work on Mac 12.5 | new | minor | 11 months |
Production version Delphes 2 (deprecated)
Production version 2.0.5:
- new tar.gz file name format
Download here: Delphes 2.0.5
Previous version 2.0.4:
- fixes compilation on MacOSX
Download here: Delphes 2.0.4
Previous version 2.0.3:
- b-tagging now based on b-quark content (thanks to A.Mertens)
- track isolation bugfix (Ticket #61, thanks to Sourav Mandal)
- Compatible with HepMC 2.05 and 2.06
- Solved: some tracks were ignored in the computation of ptiso (thanks to Sourav Mandal)
- Solved: Memory leak preventing to load many events using HepMC (thanks to Sourav Mandal)
- Solved bug in root genparticles branches when reading HepMC files (thanks to Nadja Strobbe)
- Solved bug in b-tagging (thanks to Alexandre Mertens)
- Solved bug in !Examples/Analysis_Ex.cpp (thanks to hashemi.mj)
- Solved bug in ExRootAnalysis (thanks to Pavel Demin and lessa.a.p)
- Includes Frog 3.0 (You should never need a FROG-free version anymore)
Download here: Delphes 2.0.3
The previous stable version is here: Delphes 1.9
