3rd International Workshop on Multiple Partonic Interactions at the LHC - MPI11

Europe/Berlin
DESY Hamburg

DESY Hamburg

Notkestr. 85 22607 Hamburg Germany
Description

Workshop on Multi-Parton Interactions at the LHC

Welcome to the third International Workshop on Multiple Partonic Interactions at the LHC. The aim of this workshop on Multiple Partonic Interactions (MPI) at the LHC is to raise the profile of MPI studies, summarising the legacy from the phenomenology at previous hadron colliders, reviewing the early results from the LHC and fostering contact between the theoretical and experimental communities. MPI are experiencing a growing popularity and are widely invoked to account for observations that cannot be explained otherwise: the activity of the Underlying Event, the rates for multiple heavy flavour production, the survival probability of large rapidity gaps in hard diffraction, etc. At the same time, the implementation of MPI effects in Monte Carlo generators is quickly proceeding at an increasing level of sophistication and complexity, which can have far reaching implications for LHC physics. The ultimate ambition of this workshop is to promote MPI as a unifying concept between apparently distinct lines of research, to profit from experimental progress in order to constrain their implementation in models, and to evaluate their impact on the LHC physics program.

Topics:

  • Phenomenology of MPI processes and multiparton distributions
  • Considerations for the description of MPI in QCD
  • Measuring multiple partonic interactions
  • Experimental results on inelastic hadronic collisions: underlying event, minimum bias, forward energy flow
  • Monte Carlo development and tuning
  • Connections with diffraction, heavy-ion physics and cosmic rays
Participants
  • AKBARI JAHAN
  • Albert Knutsson
  • Alexander Snigirev
  • Anatoly Kotikov
  • Andreas Goudelis
  • Andreas Schäfer
  • Andrzej Siodmok
  • Anna Kulesza
  • Arthur Moraes
  • Boris Blok
  • Daniel Ostermeier
  • Daniele Treleani
  • Deepak Kar
  • Dmytro Volyanskyy
  • Edmond BERGER
  • Elena Yatsenko
  • Ellie Dobson
  • Ezio Maina
  • Fatemeh taghavi Shahri
  • Francesco Hautmann
  • Frank Krauss
  • Frank Tackmann
  • Fritz Bopp
  • Gennadii Lykasov
  • Georg Steinbrueck
  • Georgy Golovanov
  • Halina Abramowicz
  • Hannes Jung
  • Holger Schulz
  • Iftach Sadeh
  • James Dassoulas
  • Jan Fiete Grosse-Oetringhaus
  • Jochen Bartels
  • Jonathan Gaunt
  • Judith Katzy
  • Kenneth Osterberg
  • Kerstin Borras
  • Klaus Werner
  • Koji Noda
  • Leif Lönnblad
  • Leonid Frankfurt
  • Livio Fano'
  • Luca Mucibello
  • Lucia Garbini
  • Marcella Capua
  • Mark Strikman
  • Markus Diehl
  • Martin Poghosyan
  • Maxim Nefedov
  • Michael Leyton
  • Michael Medinnis
  • Michelangelo Mangano
  • Mikhail Ryskin
  • Mohamed Cherif TALAI
  • Mohammad Yousif Mustafa
  • Nikolay Zotov
  • Niladri Sen
  • Panagiotis Katsas
  • Paolo Gunnellini
  • Paul Newman
  • Pedro Cipriano
  • Peter Loch
  • Peter Skands
  • Pierre Van Mechelen
  • Porteboeuf-Houssais Sarah
  • Ralf Ulrich
  • Sara Alderweireldt
  • Sebastian Wahrmund
  • Simon Plätzer
  • Stefan Gieseke
  • Sunil Bansal
  • Tanguy Pierog
  • Ted Rogers
  • Thomas Schoerner-Sadenius
  • Tomas Hreus
  • Tomas Kasemets
  • Tuomas Lappi
  • Vladimir Saleev
  • von Lindern Luebbo
  • Wei Wang
  • Yuri Dokshitzer
  • Zoltan Nagy
    • 09:00 10:00
      Registration 1h
    • 10:00 12:30
      Experimental results

      Experimental results on inelastic hadronic collisions: underlying event, minimum bias, forward energy flow

      • 10:00
        Minimum-bias and multi partonic interaction measurements with ALICE 30m
        Speaker: Jan Fiete Grosse-Oetringhaus
        Slides
      • 10:30
        Experimental results on inelastic hadronic collisions: underlying event, minimum bias and forward energy flow measurements with ATLAS 30m
        Speaker: Michael Leyton
        Paper
        Slides
      • 11:00
        Underlying event, minimum bias and forward energy flow measurements with CMS 30m
        Speaker: Sunil Bansal
        Paper
        Slides
      • 11:30
        Minimum Bias Results from LHCb 30m
        Speaker: Dima Volyanskyy
        Slides
      • 12:00
        J/Psi production as a function of charged particle multiplicity (ALICE experiment) 30m
        Speaker: Sarah Portebeuf
        Paper
        Slides
    • 12:30 14:00
      Lunch break 1h 30m
    • 14:00 14:40
      Experimental results

      Experimental results on inelastic hadronic collisions: underlying event, minimum bias, forward energy flow

      • 14:00
        Welcome address 10m
        Speaker: Joachim Mnich (DESY)
      • 14:10
        Measurements of MPI in underlying event in hadronic collisions 30m
        Speaker: Rick Field
        Slides
    • 14:40 16:10
      Monte Carlo development and tuning
      • 14:40
        Tuning of multiple partonic interactions model in Herwig++ using the early LHC data 30m
        Speaker: Andrzej Siodmok
        Paper
        Slides
      • 15:10
        Obtaining the CMS Ridge with Multiple Partonic Interactions 30m
        Speaker: Sara Alderweireldt
        Paper
        Slides
      • 15:40
        ATLAS MPI tunes with various pdfs 30m
        Speaker: Deepak Kar
        Paper
        Slides
    • 16:10 16:40
      Coffee break 30m
    • 16:40 17:40
      Monte Carlo development and tuning
      • 16:40
        Lessons from the early LHC data for MC tuning 30m
        Speaker: Peter SKANDS
        Slides
      • 17:10
        Inclusive distributions in p-p collisions at LHC energies compared with an adjusted DPMJET-III model with chain fusion 30m
        Speaker: Fritz Bopp
        Paper
        Slides
    • 17:40 18:10
      Phenomenology of MPI

      Phenomenology of MPI processes and multiparton distributions

      • 17:40
        Predictions for Wbbbar Production via Double Parton Scattering at the LHC 30m
        Speaker: Ed Berger
        Paper
        Slides
    • 18:30 20:00
      Welcome Reception 1h 30m
    • 09:00 10:30
      Phenomenology of MPI

      Phenomenology of MPI processes and multiparton distributions

      • 09:00
        Double parton interactions in proton-deuteron collisions 30m
        Speaker: Daniele Treleani
        Slides
      • 09:30
        Correlations in Multi-Parton Interactions 30m
        Speaker: Tomas Kasemets
        Paper
        Slides
      • 10:00
        Double parton scattering with leptonic final states at the LHC 30m
        Speaker: Dr Anna Kulesza (RWTH Aachen)
        Slides
    • 10:30 11:00
      Coffee break & Conference photo 30m
    • 11:00 12:00
      Phenomenology of MPI

      Phenomenology of MPI processes and multiparton distributions

      • 11:00
        Fluctuations of the nucleon transverse parton densities, and the structure of the inelastic collisions at the LHC. 30m
        Speaker: Mark Strikmann
        Paper
        Slides
      • 11:30
        Double heavy meson production through double parton scattering 30m
        Speaker: Nicolai Zotov
        Paper
        Slides
    • 12:00 12:30
      Measuring multiple partonic interactions
      • 12:00
        MPI measurements at HERA 30m
        Speaker: Dr Albert Knutsson (DESY)
        Slides
    • 12:30 14:00
      Lunch break 1h 30m
    • 14:00 15:30
      Measuring multiple partonic interactions
      • 14:00
        Direct measurements of MPI in ATLAS 30m
        Speaker: Ellie Dobbson
        Paper
        Slides
      • 14:30
        Measuring multiple partonic interactions with D0 30m
        Speaker: Georgy Golovanov
        Paper
        Slides
      • 15:00
        Direct MPI measurements with CMS - cancelled 30m
        Speaker: Livio Fano
    • 15:30 16:00
      Coffee break 30m
    • 16:00 17:00
      LHC, year 2: where we stand 1h
      Speaker: Michelangelo Mangano
      Slides
    • 17:00 18:00
      Poster Session
    • 09:00 10:30
      Small-x and diffraction
      • 09:00
        Multiple interactions and AGK rules 30m
        Speaker: Jochen Bartels
        Paper
        Slides
      • 09:30
        DIPSY - A new event generator for minimum bias and heavy ion collisions 30m
        Speaker: Leif Lönnblad
        Slides
      • 10:00
        MPI in diffraction at HERA, Tevatron, LHC 30m
        Speaker: Paul Newman
        Slides
    • 10:30 11:00
      Coffee break 30m
    • 11:00 12:30
      Small-x and diffraction
      • 11:00
        Small x behavior of parton distributions. Analytical and ``frozen'' coupling constants. High-energy neutrino-nucleon cross-sections. 30m
        Speaker: Anatoli Kotikov
        Paper
        Slides
      • 11:30
        Unintegrated gluon distributions and soft p-p collisions at LHC 30m
        Speaker: Gennady Lykasov
        Paper
        Slides
      • 12:00
        First total and elastic proton-proton cross section measurements with TOTEM at LHC 30m
        Speaker: Kenneth Österberg
        Slides
    • 12:30 14:00
      Lunch break 1h 30m
    • 14:00 15:00
      Small-x and diffraction
      • 14:00
        Isolated jet production with multi-Regge kinematics at Tevatron and LHC 30m
        Speaker: Vladimir Saleev
        Paper
        Slides
      • 14:30
        DVCS+VM 30m
        Speaker: Marcella Capua
        Paper
        Slides
    • 15:00 15:30
      Theoretical considerations for the description of MPI
      • 15:00
        Theoretical considerations for the double Drell-Yan process as a prototype MPI 30m
        Speaker: Andreas Schäfer
        Paper
        Slides
    • 16:00 19:00
      Excursion 3h
    • 09:00 10:30
      Theoretical considerations for the description of MPI
      • 09:00
        A new look at multi-parton collisions 30m
        Speaker: Yuri Dokshitzer
        Paper
        Slides
      • 09:30
        pQCD physics of multiparton interactions 30m
        Speaker: Boris Blok
        Slides
      • 10:00
        The double parton scattering singularity in one-loop integrals, and the double parton scattering cross section. 30m
        Speaker: Jonathan Gaunt
        Paper
        Slides
    • 10:30 11:00
      Coffee break 30m
    • 11:00 12:30
      Theoretical considerations for the description of MPI
      • 11:00
        Unitarity and Consistency in Multiple Hard Collisions 30m
        Speaker: Ted Rogers
        Paper
        Slides
      • 11:30
        Multiparton interactions and parton showers 30m
        Speaker: Francesco Hautmann
        Paper
        Slides
      • 12:00
        Multi-gluon correlations in the Color Glass Condensate 30m
        Speaker: Tuomas Lappi
        Paper
        Slides
    • 12:30 14:00
      Lunch break 1h 30m
    • 14:00 14:30
      Theoretical considerations for the description of MPI
      • 14:00
        Collinear distributions in double parton scattering 30m
        Speaker: Alexander Snigirev
        Paper
        Slides
    • 14:30 15:40
      Connection with heavy-ion physics
      • 14:30
        Multiple partonic interactons in Heavy Ion collisions 40m
        Speaker: Martin Poghosyan
        Slides
      • 15:10
        Multiple scattering and hydrodynamical evolution in pp and PbPb collisions at the LHC 30m
        Speaker: Klaus Werner
        Slides
    • 15:40 16:40
      Connection with cosmic rays
      • 15:40
        Interactions In Extensive Air Showers 30m
        Speaker: Ralf Ulrich
        Slides
      • 16:10
        Constraints for the Modeling of Multi Parton Interactions in Astroparticle Physics 30m
        Speaker: Tanguy Pierog
        Slides
    • 17:00 23:00
      Workshop dinner 6h
    • 09:00 09:30
      Connection with cosmic rays
      • 09:00
        Forward photon spectrum in 7 TeV pp collisions measured by the LHCf experiment 30m
        Speaker: Koji Noda
        Paper
        Slides
    • 09:30 10:30
      Monte Carlo development and tuning
      • 09:30
        Multiparton interactions in HERWIG++ 30m
        Speaker: Stefan Gieseke
        Paper
        Slides
      • 10:00
        MPI and Diffraction in PYTHIA 30m
        Speaker: Peter Skands
        Slides
    • 10:30 11:00
      Coffee break 30m
    • 11:00 11:30
      Monte Carlo development and tuning
      • 11:00
        Towards a new model for Minimum Bias and the Underlying Event in Sherpa 30m
        Speaker: Frank Krauss
        Slides
    • 11:30 13:00
      Round table
      • 11:30
        Experiment 45m
        Speaker: Arthur Moraes
        Paper
        Slides
      • 12:15
        Theory 45m
        Speaker: Jochen Bartels
        Paper
    • 14:00 16:00
      Guided tour of DESY (optional) 2h