Projects per year
Abstract
This report presents the results of the Models and Effective Field Theories Subgroup of the Off-Shell Interpretations Task Force in the LHC Higgs Working Group. The main goal of the subgroup was to discuss and advance the potential impact of off-shell Higgs measurements on searches for BSM physics carried out in the EFT framework or as benchmark model studies. In the first contribution, the off-shell potential to resolve flat directions in parameter space for on-shell measurements is studied. Furthermore, the sensitivity of off-shell measurements to SMEFT dimension-6 operators for the gg → ZZ process is discussed, and studies of explicit models that are testable in off-shell production are reviewed. In the second contribution, the SMEFT effects in the off-shell gluon fusion and electroweak processes are discussed. Subsequently, the computation of integrated and differential effects using SMEFT@NLO and MG5 aMC@NLO, or JHUGen and MCFM, is demonstrated. On that basis, a study of the prospects of obtaining additional SMEFT constraints – beyond those from existing global fits – by utilising the off-shell process is presented. For clarification, a revised introduction, definition and discussion of the Higgs basis parametrisation of the SMEFT is given in the third contribution. In short notes on the SMEFT, the Higgs basis with an additional constraint is discussed and relations between the Higgs and Warsaw bases are presented. Lastly, an overview of EFT calculations and tools is given.
Original language | English |
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Publisher | CERN |
Commissioning body | European Organization for Nuclear Research |
Number of pages | 54 |
DOIs | |
Publication status | Published - 16 May 2022 |
Projects
- 1 Finished
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South-Eastern Particle Theory Alliance Sussex – RHUL – UCL 2017-2020, RHUL Node
Kauer, N. (PI) & Lind, A. (Student)
Science and Technology Facilities Council
1/10/17 → 30/09/21
Project: Other