Key4hep Discussion

Tuesday Sep 10, 2024, 1:00 PM → 2:00 PM Europe/Zurich

32/S-C22 (CERN)

Live Notes

CERN Key4hep Discussion
===

Attendees: Giulia, Katerina, Swathi, Juan, Mateusz, Andre, Leonhard

Apologies: Benedikt

Date: September 17

## News

## Round The Table

### Leonhard

* Turned on some operators in Whizard for the process
* Started using RDataSource for EDM4hep
    * Cannot use collections like RVec's would be nice if collections could be used directly, need to loop manually
    * "Notebook" design pattern???
* MuColl -- ACTS tracking meeting
    * ACTS meeting: https://indico.cern.ch/event/1451371/ 

### Andre

* Back from vacation

### Mateusz

* EDM4hep and podio pythonisation to disable adding attributes
    * Makes collections return existing objects as const objects (immutable)
    * Bad things happened with mutable objects
    * Add bounds checking for `__getitem__`????
* FWCore 
    * MetadataHandle is merged 
    * MetadataSvc in review

### Juan

* CED transparency fixed by using system libraries again
* New release Key4hep release
    * Associations --> links in podio
        * https://github.com/AIDASoft/podio/pull/257
        * Need to try out if files are readable that were made before

* Compilerflag alignment for repos
* Overlay ready to be merged after final test

### Swathi

* Wrote PandoraPFA section for Feasibility study software note
* Worked with Katerina: DDCaloDigi tried validation for ILD, does not use DDCaloDigi any longer
    * Already separated into specific digitisers

### Katerina

* PR with DDCaloDigi: https://github.com/key4hep/k4GaudiPandora/pull/4
* Split DDCaloDigi into Silicon and Scintillator
    * Some things are only applied in ECal, "LayerConfig"

* ILD has RealisticCaloDigi processors

### Giulia

* Hits are lost after a secondary particle is created, if that secondary particle takes most of the energy.
    * Half of the secondary photons are reconstructed as electrons, because

## AOB

## Summerstudents

* Dates:
    * Katerina Kostova: 01/07 to 27/09
        * Rehearsal: Thu, Sep 19, 10:00
    * Giulia Gianoli: 01/07 to 27/09
        * Rehearsal: Thu, Sep 19, Afternoon

## Next Meeting

September 17, 2024

## TODO

1:00 PM → 1:55 PM Round The Table

Speakers: Andre Sailer (CERN), Benedikt Hegner (CERN), Carsten Hensel (CBPF - Brazilian Center for Physics Research (BR)), Juan Miguel Carceller (CERN), Leonhard Reichenbach (University of Bonn (DE)), Mateusz Jakub Fila (CERN), Swathi Sasikumar (CERN)

acts meeting