Higgs Pair Production at Colliders

Europe/Berlin
02.430 (Mainz Institute for Theoretical Physics<br>Johannes Gutenberg University)

02.430

Mainz Institute for Theoretical Physics<br>Johannes Gutenberg University

Staudingerweg 9 / 2<sup>nd</sup> floor 55128 Mainz
Description
Multiple Higgs boson production will give access to new Higgs interactions that are totally unconstrained with the current LHC data. The Higgs mass has been accurately measured and the Higgs couplings to matter fields have been determined at the 10-20% level and will be further improved during the next run. Higgs pair production (HH) will give access to multiple Higgs interactions, such as the Higgs triple self-coupling and, in addition, the coupling of two Higgs bosons to two gauge bosons, to two fermions, and to new particles.

In the last two years an enormous progress has been made on several aspects of Higgs pair production at the LHC: the theoretical accuracy on the production cross section has substantially improved, new decay channels have been proposed and preliminary studies are available which are based on sophisticated techniques such as jet-substructure and shower deconstruction, Monte Carlo event generation can now be performed at the NLO level and the effects of new physics have been studied in several concrete models, finding that this process can deviate significantly from the SM prediction while having agreement with current Higgs data.

The goal of this workshop is to gather together theoreticians (from the QCD, BSM and Monte Carlo communities) and LHC experimentalists to analyze the status of HH production studies.
Executive Summary
List of participants
    • 10:30 AM
      Welcome Coffee
    • Welcome
    • Standard Model HH @ LHC: Pheno
      • 1
        Higgs Pairs
        Speaker: Prof. Tilman Plehn
        Slides
      • 2
        SM HH @ LHC: viable channels
        Speaker: Prof. Michael Spannowsky
        Slides
    • 12:10 PM
      Lunch Break
    • HH @ LHC: Experiment
      • 3
        ATLAS
        Speaker: Dr Nick Styles
        Slides
      • 4
        CMS
        Speaker: Prof. Souvik Das
        Slides
    • 3:00 PM
      Coffee and Cake Break
    • Discussion: TH / EXP Forum
      Conveners: Prof. Aleandro Nisati, Prof. Mühlleitner Margarete
    • BSM HH @ LHC: Concrete models
      • 5
        HH in Strongly Interacting Models
        Speaker: Dr Ramona Gröber
        Slides
      • 6
        HH in Weakly Interacting Models
        Speaker: Prof. Christoph Englert
        Slides
    • 11:10 AM
      Coffee Break
    • Discussion: BSM Physics
      Convener: Dr José Zurita
      • 7
        BSM Physics: informal discussion
        Speaker: Dr José Francisco Zurita
        Slides
    • 12:00 PM
      Lunch break
    • 3:30 PM
      Coffee Break
    • BSM HH @ LHC: EFT
      • 8
        HH in EFT
        Speaker: Dr Florian Goertz
        Slides
    • Discussion: How large can lambda be?
      Convener: Prof. Christophe Grojean
    • MC generators
      • 9
        MC for HH
        Speaker: Dr Marco Zaro
        Slides
    • 10
      A new approach to treat non-resonant GF hh physics at LHC
      Speaker: Dr Alexandra Oliveira
      Slides
    • 10:45 AM
      Coffee Break
    • Discussion: Experimental signatures
      • 11
        Experimental Signatures
        Speaker: Prof. Maxim Gouzevitch
        Slides
    • 11:45 AM
      Lunch Break
    • Higher order corrections
      • 12
        Towards full NLO for HH
        Speaker: Prof. Gudrun Heinrich
        Slides
      • 13
        HH @ NLO with finite top mass effects
        Speakers: Dr Eleni Vryonidou, Dr Jonathan Grigo
        Slides
    • 4:00 PM
      Coffee Break
    • Discussion: Foreseeable improvements in HH production
      Convener: Prof. Sally Dawson
      • 14
        Foreseeable improvements in HH production
        Speaker: Prof. Sally Dawson
        Slides
    • 6:30 PM
      Social Dinner
    • Future Colliders
      • 15
        HH @ future colliders
        Speaker: Prof. Roberto Contino
        Slides
      • 16
        HH @ 100 TeV: golden and silver channels
        Speaker: Dr Andreas Papaefstathiou
        Slides
    • 10:30 AM
      Coffee Break
    • Discussion: Future Colliders
      Convener: Prof. Aleandro Nisati