Work meeting of LHC Darkshowers taskforce

Monday 15 Jun 2026, 16:00 → 17:00 Europe/Zurich

Cesare Cazzaniga, Christiane Scherb, Felix Karl David Kahlhoefer (Karlsruhe Institute of Technology), Jackson Carl Burzynski (University of Oklahoma (US)), Kevin Pedro (Fermi National Accelerator Lab. (US)), Sukanya Sinha (The University of Manchester (GB))

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GMT20260615-135957_Recording_1920x1200.mp4

16:00 → 16:10 Introduction and general news

Speakers: Cesare Cazzaniga (Deutsches Elektronen-Synchrotron (DE)), Sukanya Sinha (The University of Manchester (GB))

LHC BSM WG Darkshowers plenary: tomorrow (16th June): https://indico.cern.ch/event/1687390/ [3-5pm CET]

16:10 → 16:30 Semi-visible jets model

Speaker: Emily Ann Smith (Fermi National Accelerator Lab. (US))

DarkShowers Taskforce.pdf

16:30 → 16:50 Pythia version comparisons

Speaker: Mr Miguel Angel Avendano Bernal (University of Southampton)

Dark_Showers_Taskforce_PYcomp_Miguel_Talk_v1 (1).pdf

We will review different tools at the jet-substructure level to study Semi-Visible Jets (SVJs), formed by the decay of an intermediate massive Z' boson. While characterising these signals, we need to compare how much changes have been through version to version of PYTHIA8. We will show a review at how the HV parameters will vary from signal to signal in each version. The angularity and the charged hadron mutiplicity will help us to understand how the hadronisation and the dark shower has been changed from earlier versions to the latest version. Finally, we will also mention how global kinematics (MET), were modified from version to version.