Name: Workshop on the tuning of hadronic interaction models
Start: 2024-01-22T14:00:00+01:00
End: 2024-01-25T16:00:00+01:00
Location: University Wuppertal

Monday, 22 January
- 1
  
  Welcome
  
  Speaker: Karl-Heinz Kampert (Department of Physics)
  
  Workshop-Intro.pdf
- 2
  
  Tuning of event generators with accelerator and astroparticle experiments
  
  Speaker: Hans Dembinski (TU Dortmund)
  
  dembinski.pdf
- Accelerator input
  - 3
    
    LHCb colliding-beam measurements for astroparticle physics
    
    LHCb colliding-beam measurements for astroparticle physics
    
    Speaker: Michael Schmelling
    
    talk.pdf
  - 4
    
    Measurements of Relevance for Cosmic-Ray Physics with NA61/SHINE
    
    Measurements of Relevance for Cosmic-Ray Physics with NA61/SHINE
    
    Speaker: Michael Unger
    
    wuppertalv2.pdf
- 16:00
  
  Coffee break
- Generators & Theory
  - 5
    
    Pythia 8 Overview
    
    Pythia 8 Overview
    
    Speaker: Torbjörn Sjöstrand (Lund University)
    
    pythia8wuppertal.pdf
  - 6
    
    Sibyll-2.3d and SIBYLL-STAR
    
    Speaker: felix riehn (igfae, usc, santiago de compostela)
    
    sibyll-star-hadTuneWorkshop-2024-v1.pdf
  - 7
    
    Hadronic interactions in Angantyr
    
    In recent times, the Pythia event generator has been extended to feature simulations of generic hadron-nucleon interactions. In this talk, I present a further extension to hadron-ion interactions, which are of particular relevance for air showers where hadronic cascades interact with nuclei in the air.
    
    The model has been validated against NA61/SHINE data. The model also has applications to the vector-meson dominance component of photo-induced processes, and in this context has been found to give a good description of HERA and ATLAS data.
    
    Speaker: Marius Utheim
    
    Hadronic Interactions in Angantyr.pdf
Tuesday, 23 January
- Generators & Theory
  - 8
    
    Air shower predictions of QGSJET-III and model uncertainties for Xmax
    
    I shall discuss new theoretical approaches implemented in the QGSJET-III Monte Carlo generator and present selected model results regarding secondary hadron production in hadron-proton and hadron-nucleus collisions. The predictions of the model for basic characteristics of proton-induced extensive air showers (EAS) will be compared to the ones of QGSJET-II and of other cosmic ray interaction models. In the second part of my talk, I shall concentrate on potential model uncertainties regarding predictions for EAS maximum depth.
    
    Speaker: Sergey Ostapchenko (Hamburg University, II Institute for Theoretical Physics)
    
    wuppertal-ostapchenko.pdf
  - 9
    
    EPOS4 overview
    
    EPOS4 overview
    
    Speaker: Klaus Werner (SUBATECH)
    
    wuppertal.pdf
  - 10
    
    EPOS-LHCR
    
    Speaker: Tanguy Pierog (KIT, IAP)
    
    Pierog_EPOS_LHC-R_2024.pdf
- 10:30
  
  Coffee break
- Particle transport in matter
  - 11
    
    CORSIKA 8 overview
    
    Speaker: Alexander Sandrock (Bergische Universität Wuppertal)
    
    Sandrock.pdf
  - 12
    
    MCEq for atmospheric lepton flux calculation
    
    Speaker: Anatoli Fedynitch (Institute of Physics, Academia Sinica, Taipei, Taiwan)
    
    20240123_Wuppertal_Anatoli.pdf
  - 13
    
    atmospheric flux calculations and LHC input
    
    I discuss the calculations of atmospheric fluxes (prompt and conventional)
    and LHC input useful for it.
    
    Speaker: Maria Vittoria Garzelli (II Institut fuer Theoretische Physik, Universitaet Hamburg)
    
    semwup.pdf
- 12:30
  
  Lunch break
- 14
  
  About train driver's strike
  
  Speaker: Hans Dembinski (TU Dortmund)
  
  train strike.pdf
- Astroparticle input
  - 15
    
    Overview on UHECR interactions
    
    Speaker: Ralph Engel (Karlsruhe Institute of Technology (KIT))
    
    Overview-UHECR-Interactions-Engel-2024-v1.pdf
  - 16
    
    The role of direct muon measurements in Auger
    
    Speaker: Markus Roth (KIT)
    
    Direct muon detection at Auger - MRoth.pdf
  - 17
    
    KASCADE
    
    Speaker: Andreas Haungs (Baden)
    
    Tuning_Wuppertal_2024_KASCADE_haungs.pdf
  - 18
    
    WHISP
    
    Speaker: Lorenzo Cazon (IGFAE - University of Santiago de Compostela)
    
    WHISP_Tuning2024.pdf
- 16:00
  
  Coffee break
- Particle transport in matter
  - 19
    
    Air shower genealogy
    
    genealogical studies of EM and hadron/muon EAS component with CORSIKA 8 and comparisons with Heitler-Matthews model
    
    Speaker: Maximilian Reininghaus
    
    presentation.pdf
    
    presentation_public.pdf
  - 20
    
    Strangeness enhancements and the muon excess in extensive air showers
    
    Several high-energy cosmic-ray experiments have observed an excess of muons compared to theoretical expectations from air shower simulations based on standard hadronic interaction models. We investigate the potential of producing states of dense quark-gluon matter (so-called fireballs) to resolve the excess of muons on the ground for a given depth of the shower maximum. Adopting a phenomenological fireball model, we find that the inelasticity enhancement associated with the formation of a plasma state is in tension with data on the electromagnetic longitudinal shower development. We then restrict the fireball model to only enhance the strangeness produced in Standard Model hadronic interactions, and dub this model the strangeball model. Comparing with air shower measurements we find strangeball parameters that resolve the muon puzzle. Constraints from data on shower-to-shower fluctuations of the muon number require strangeness enhancements already at energies accessible to current-generation collider experiments. The strangeball
    hypothesis leads to a 5–9% increase of the average fraction of energy retained in the hadronic cascade compared to predictions from current hadronic interaction models. A comparison with relevant measurements of the LHCf and LHCb detectors does not directly exclude this scenario, though the obtained tension with LHCb suggests a stringent test at 14 TeV.
    
    Based mainly on Manshanden, Sigl and Garzelli, JCAP02 (2023) 017.
    
    Speaker: Guenter Sigl (Universität Hamburg)
    
    strangeball-model.pdf
  - 21
    
    CRPropa: overview and embedded hadronic interactions
    
    CRPropa 3.2, released recently, is the latest update in a continued effort to maintain and extend this open-source code well known in the cosmic-ray community. Originally aimed at simulating the ballistic propagation and interactions of Ultra-High Energy Cosmic Rays, today it can handle diffusive propagation of cosmic rays in a variety of magnetic fields, deal with stochastic cosmic ray acceleration, model electromagnetic cascades for gamma ray emission and transport, among other capabilities. Of special interest is the introduction of hadronic interactions to facilitate the treatment of cosmic ray interactions in the galaxy and within the sources. This talk provides an up-to-date overview of the code and details the recently implemented hadronic interactions.
    
    Speaker: Leonel Morejon (BUW)
    
    TuningHIMs_23.01.2024.pdf
Wednesday, 24 January
- Accelerator input
  - 22
    
    Fixed target experiments at the LHC: SMOG and SMOG2 at LHCb
    
    Speaker: Giacomo Graziani (INFN, Sezione di Firenze)
    
    graziani_lhcbFT.pdf
  - 23
    
    Models and Measurements of Antiproton Production for Cosmic-Ray Studies
    
    Models and Measurements of Antiproton Production for Cosmic-Ray Studies
    
    Speaker: Thomas Pöschl (CERN)
    
    poeschl_Wuppertal.pdf
- Tuning of event generators
  - 24
    
    A RIVETing journey: Analysis Preservation and Generator Tuning in High Energy Physics
    
    A RIVETing journey: Analysis Preservation and Generator Tuning in High Energy Physics
    
    Speaker: Lars Kolk (TU Dortmund)
    
    TuningWorkshop_LarsKolk_24_01_24.pdf
    
    TuningWorkshop_LarsKolk_24_01_24.pptx
- 10:30
  
  Coffee break
- Tuning of event generators
  - 25
    
    MCPLOTS : MC validation resource based on volunteer computing
    
    We present the MCPLOTS online resource for MC event-generator validations. The project is based on the RIVET analysis library and harnesses volunteer computing to generate high-statistics MC comparisons to data. Users interact with the resource via a simple web site, mcplots.cern.ch, where run cards, histogram points, etc, are all made easily available for download. The project has been structured to enable community-driven developments, and we discuss the computational back end, the web front end, and possibilities for further extensions and collaboration.
    
    Speaker: Natalia Korneeva (Monash University)
    
    mcplots-wuppertal.pdf
  - 26
    
    Tuning of Pythia 8 for simulations of UHECR induced air showers
    
    Speaker: Chloé Gaudu (Bergische Universität Wuppertal)
    
    24_01_2024_Gaudu.pdf
  - 27
    
    Tuning with Bayesian methods
    
    Speaker: Michael Windau (TU Dortmund)
    
    tuningworkshop_240124_mwindau.pdf
- 12:30
  
  Lunch break
- Astroparticle input
  - 28
    
    Relevance of hybrid data to the tuning of hadronic interaction models
    
    Relevance of hybrid data to the tuning of hadronic interaction models
    
    Speaker: Jakub Vícha (FZU - Institute of Physics of Czech Academy of Sciences)
    
    HybridObservables_TuningWorkshop_2024.pdf
  - 29
    
    Radio Detection and its relevance for studying air shower physics
    
    Radio Detection and its relevance for studying air shower physics
    
    Speaker: Tim Huege (Karlsruher Institut für Technologie)
    
    huege-Radio-WuppertalHadronicInteractionsWorkshop.pdf
  - 30
    
    IceTop observables for tuning
    
    Speaker: Dennis Soldin
    
    TuningWorkshop2024_DSoldin.pdf
  - 31
    
    IceCube observables for tuning
    
    Speaker: Mirco Hünnefeld (TU Dortmund University)
    
    2024_01_24__sfb1491_wuppertal.pdf
- 16:00
  
  Coffee break
- Astroparticle input
  - 32
    
    Modified Hadronic Interactions in CORSIKA 7
    
    Ulrich et al. have shown already in 2011 that changing the cross-section, elasticity and multiplicity of hadronic interactions at very high energies with respect to the standard hadronic interaction models has a direct impact on predicted depths of the shower maxima and numbers of muons at ground. We have expanded this work from the original 1D implementation in CONEX to full 3D simulations in CORSIKA, allowing us to quantify the effects of the modified interactions on other observables. We find that satisfying the latest constraints from the Pierre Auger Observatory on the number of muons at 1000 meters from the shower axis and depth of shower maximum simultaneously is challenging, but possible within a reasonable space of modifications.
    
    Speaker: Jan Ebr (FZU - Institute of Physics of the Czech Academy of Sciences)
    
    prezentace-wuppertal2024.pdf
- Generators & Theory
  - 33
    
    Introduction and overview of the UrQMD model for p+A and A+A reactions
    
    This talk provides an introduction into the Ultra-relativistic Quantum Molecular Dynamics model (UrQMD). UrQMD is a well established transport approach to simulate hadron-hadron, hadron+nucleus and nucleus+nucleus reactions at beam energies starting from 1 GeV to center-of-mass energies of a few hundred GeV. UrQMD has been well tested against a wide range of accelerator data for various collision systems and allows to obtain a full momentum distribution of all final state particles.
    
    Speaker: Prof. Marcus Bleicher (Uni Frankfurt)
    
    2024_Bleicher_Wuppertal.pdf
- Tuning of event generators
  - 34
    
    Tuning in the far forward region for FASER
    
    Speaker: Max Fieg
    
    TuningPythiaFPF_HadInt.pdf
- 19:00
  
  Social dinner in a restaurant
Thursday, 25 January
- Accelerator input
  - 35
    
    ALICE measurements for tuning
    
    Speaker: Antonin MAIRE (IPHC-CNRS IN2P3 (Strasbourg))
    
    Conf-2024-01-Workshop-MCtuningForCosmicRays-2024-01-25.pdf
- Generators & Theory
  - 36
    
    Status of nuclear-PDF analyses and prospects with light ions
    
    Status of nuclear-PDF analyses and prospects with light ions
    
    Speaker: Petja Paakkinen (University of Jyväskylä)
    
    Paakkinen_nPDFs_Wuppertal.pdf
  - 37
    
    Chromo: An event generator frontend for particle and astroparticle physics
    
    Chromo: An event generator frontend for particle and astroparticle physics
    
    Speaker: Anton Prosekin (Institute of Physics, Academia Sinica, Taipei, Taiwan)
    
    Chromo_wuppertal.pdf
- 38
  
  Summary and final remarks on the workshop
  
  Speakers: Hans Dembinski (TU Dortmund), Karl-Heinz Kampert (Department of Physics)

Workshop on the tuning of hadronic interaction models

Guesthouse, Campus Freudenberg

University Wuppertal