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XLV International Symposium on Multiparticle Dynamics

4–9 Oct 2015
Europe/Berlin timezone

Session

High Energy and High Pt Interactions

6 Oct 2015, 13:55

Conveners

High Energy and High Pt Interactions

  • Maxime Gouzevitch (IPNL, Lyon)
  • Stefan Hoeche (SLAC National Accelerator Laboratory)

Presentation materials

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  1. 52. Measurement of observables sensitive to coherence effects in hadronic Z decays with the OPAL detector at LEP
    Stefan Gieseke (KIT), Dr Stefan Kluth (MPI für Physik)
    06/10/2015, 14:00
    High Energy and High Pt Interactions
    Oral Presentation
    A study of QCD coherence is presented based on a sample of about 397,000 e+e- hadronic annihilation events collected at sqrt{s} = 91 GeV with the OPAL detector at LEP. The study is based on four recently proposed observables that are sensitive to coherence effects in the perturbative regime. The measurement of these observables is presented, along with a comparison with the predictions of...
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  2. 122. Recent developments in Monte-Carlo Event Generators
    Marek Schoenherr (University of Zurich)
    06/10/2015, 14:20
    High Energy and High Pt Interactions
    Oral Presentation
    With Run II of the LHC having started, the need for high precision theory predictions whose uncertainty matches that of the data to be taken necessitated a rage of new developments in Monte-Carlo Event Generators. In this talk I will give an overview of the progress in recent years in the field and what can and cannot be expected from these newly written tools.
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  3. 116. Latest results on top production from the CMS and ATLAS collaborations: nclusive and differential measurements
    Prof. Enrico Tassi (Universita' della Calabria and INFN-Cosenza)
    06/10/2015, 14:45
    High Energy and High Pt Interactions
    Oral Presentation
    In proton-proton collisions at the LHC, pairs of top and anti-top quarks are expected to be mostly produced through gluon fusion and the large number of ttbar pairs can be used to test the predictions of Quantum Chromodynamics. Measurements of the top quark production cross sections in proton-proton collisions at 7 and 8 TeV with the ATLAS and CMS detectors at the Large Hadron Collider...
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  4. 120. Supersymmetry searches at LHC in hadronic final states
    Sascha Caron (Nikhef and Radboud University Nijmegen)
    06/10/2015, 15:10
    High Energy and High Pt Interactions
    Oral Presentation
    Despite the absence of experimental evidence, weak scale supersymmetry remains one of the best motivated and studied Standard Model extensions. This talk summarises recent ATLAS and CMS results for searches for supersymmetric (SUSY) particles, with an emphasis on strong production in both R-Parity conserving and R-Parity violating SUSY scenarios. The searches involve final states including...
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  5. 123. Measurements of Vector Boson plus jets with the ATLAS and CMS detectors
    Mr Vieri Candelise (Univ. di Trieste e Sez. dell'INFN, Italy)
    06/10/2015, 16:30
    High Energy and High Pt Interactions
    Oral Presentation
    The production of vector bosons (V = W, Z or ?) in association with jets is a stringent test of perturbative QCD and is a background process in searches for new physics. The differential cross-section measurements measurements from CMS and ATLAS collaborations would be presented. The multijet topologies and event shape variables represent a particular interest to test multi-leg LO...
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  6. 121. Resummed Results for Hadron Collider Observables
    Ms Heather McAslan (University of Sussex)
    06/10/2015, 16:55
    High Energy and High Pt Interactions
    Oral Presentation
    This talk will provide a summary of progress in the resummation of observables for hadron colliders, focusing in particular on event shape observables. Event shapes and jet rates are invaluable QCD tools for theoretical calculations and experimental measurements. I will revise the definition of these observables in hadron collisions, and give a review of the state-of-the-art results for their...
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  7. 119. Studies of jet cross-sections and production properties with the ATLAS and CMS detectors
    Mr Nuno Anjos (IFAE (Barcelona))
    06/10/2015, 17:20
    High Energy and High Pt Interactions
    Oral Presentation
    Several aspects of jet production in pp collisions have been measured by the ATLAS and CMS collaborations. The jet production cross sections probe the dynamics of QCD and can constrain the parton proton structure. Double-differential cross sections for inclusive, di-, three- and four-jet final states are measured at different centre-of-mass energies of pp collisions with the ATLAS detector...
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  8. 2. Search for QCD Instanton-Induced Processes in DIS at HERA
    Dr Hayk Pirumov (DESY)
    06/10/2015, 17:45
    High Energy and High Pt Interactions
    Oral Presentation
    Signals of QCD instanton-induced processes are searched for in deep-inelastic scattering (DIS) at the electron-proton collider HERA in the kinematic region defined by the Bjorken-scaling variable x > 10^{-3}, the inelasticity 0.2< y < 0.7 and the photon virtuality 150 < Q^2 < 15000 GeV^2. The search is performed using H1 data corresponding to an integrated luminosity of ~350 pb^{-1}. Several...
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