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8th General Meeting of the LHC EFT Working Group

2–4 Dec 2024
CERN
Europe/Zurich timezone

Contribution List

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  1. 27. Highlights from ATLAS
    Eleonora Rossi (University of Oxford (GB))
    02/12/2024, 13:00
  2. 28. Highlights from CMS
    Fabian Stager (University of Zurich (CH))
    02/12/2024, 13:30
  3. 29. Highlights from LHCb
    Zahra Ghorbanimoghaddam (University of Bristol)
    02/12/2024, 14:00
  4. 30. RG effect in SMEFT (fits)
    Eleni Vryonidou (The University of Manchester (GB)), Luca Mantani (IFIC, Valencia)
    02/12/2024, 14:50
  5. 31. NLO SMEFT predictions (for Zh and beyond)
    Konstantin Asteriadis
    02/12/2024, 15:20
  6. 19. Quantifying EFT Truncation Uncertainties at the LHC
    Markus Luty (University of California Davis), Markus Luty
    02/12/2024, 15:50
  7. 20. Discussion on truncation
    02/12/2024, 16:10
  8. 11. SMEFT predictions for semileptonic processes
    Siddhartha Karmakar (Tata Institute of Fundamental Research)
    02/12/2024, 16:55

    The $SU(2)_L\times U(1)_Y$ invariance of the Standard Model Effective Field Theory (SMEFT) predicts multiple restrictions in the space of Wilson coefficients of $U(1)_{em}$ invariant effective lagrangians such as the Low-energy Effective Field Theory (LEFT), used for low-energy flavor-physics observables, or the Higgs Effective Field Theory (HEFT) in unitary gauge, appropriate for...

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  9. 12. Towards the HEFT-hedron: the complete set of positivity constraints on HEFT operators at NLO
    Debsubhra Chakraborty
    02/12/2024, 17:15

    We present the complete set of positivity bounds on the Higgs Effective Field Theory (HEFT) at next-to-leading order. We identify the 15 operators that can be constrained by positivity, as they contribute to $s^2$-growth in the amplitude for longitudinal gauge-Higgs scattering, that is to the $VV \to VV$, $hh$, $Vh$, and $hh \to VV$, $Vh$ processes, where $V = W^\pm, Z$, $h$ is the observed...

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  10. 3. Evanescent operators at the one-loop level
    Jason Aebischer (CERN)
    02/12/2024, 17:35

    I will discuss general basis transformations in Effective Field theories at the tree- and one-loop level. To this end, the notion of Evanescent operators and their formulation in terms of one-loop Fierz transformations will be introduced. To illustrate the usefulness of this approach several examples will be discussed, including scheme factorization. Comments on Evanescence free...

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  11. 18. On the SMEFT basis for Anomalous Quartic Gauge Couplings
    Nicholas Llewellyn Rodd (School of Physics-University of Melbourne-Unknown), Nicholas Llewellyn Rodd (CERN), Nicholas Rodd
    02/12/2024, 17:55
  12. 24. EFT Analysis of Composite Higgs Models
    Benjamin Stefanek (IFIC Valencia)
    03/12/2024, 09:00
  13. 26. Two-Higgs Doublet Model Matched to Nonlinear Effective Theory
    Florian Pandler (LMU Munich)
    03/12/2024, 09:25
  14. 25. Matching the MSSM to the SMEFT
    Felix Wilsch (RWTH Aachen University)
    03/12/2024, 09:50
  15. 4. From the EFT to the UV: the complete SMEFT one-loop dictionary
    Guilherme Guedes (DESY)
    03/12/2024, 10:15

    Effective field theories (EFTs) offer a rationale to classify new physics models based on the size of their contribution to the effective Lagrangian, and therefore to experimental observables. However, given the amount of UV theories, it is in practice difficult to identify the set of UV theories which can generate a particular low-energy pattern. While current matching softwares have made the...

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  16. 15. SMEFT meets Quantum Gravity
    Astrid Eichhorn
    03/12/2024, 11:10
  17. 2. Electroweak corrections from Sudakov logarithms in the SMEFT
    Hesham El Faham (The University of Manchester)
    03/12/2024, 11:40

    Electroweak (EW) corrections, significantly influenced by Sudakov logarithms, become the predominant higher-order effect at the TeV scale and beyond. In this study, we compute EW corrections in the high-energy limit for selected dimension-six SMEFT operators. Our findings reveal that while four-fermion operators exhibit universally similar corrections as those seen in the Standard Model (SM),...

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  18. 14. SMEFT NLO correction to Higgs decay in an events generator
    Mr shakeel ur rahaman
    03/12/2024, 12:00

    In recent years, particle physicists have actively constrained potential new physics contributions by leveraging the Large Hadron Collider (LHC) data and the SMEFT framework. Measurement of the properties of Higgs boson is central to this program. However, the robust analysis hinges on the inclusion of higher order (NLO) Electroweak (EW) and QCD corrections arising from dimension-6 SMEFT...

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  19. 8. Wilk's theorem follow-up discussion
    Stephen Burns Menary (University of Manchester (GB))
    03/12/2024, 13:45
  20. 6. Staying on Top of SMEFT-Likelihood Analyses
    Nikita Schmal, Nikita Schmal (Heidelberg University)
    03/12/2024, 14:05
  21. 9. Round-table discussion on Likelihoods for EFT
    Ken Mimasu (University of Southampton), Nikita Schmal (Heidelberg University), Nikita Schmal, Robert Schoefbeck (Austrian Academy of Sciences (AT))
    03/12/2024, 14:25
  22. 1. EFT dimension-6 and dimension-8 study with VBS events at CMS
    Costanza Carrivale (Universita e INFN, Perugia (IT))
    03/12/2024, 14:45

    A first measurement is presented of the cross-section for the scattering of same-sign W boson pairs via the detection of a τ lepton. The data from proton-proton collisions at the center-of-mass energy of 13 TeV were collected by the CMS detector at the LHC, corresponding to an integrated luminosity of 138 fb−1. Events containing two jets with large pseudorapidity and large invariant mass, one...

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  23. 13. New physics effects at colliders via HEFT
    Anisha . (Karlsruhe Institute of Technology)
    03/12/2024, 15:02

    Due to the lack of direct evidence in the search for new physics (NP), the Effective Field Theory (EFT) framework offers an indirect and model-independent approach to parameterize NP effects. In this talk, I will focus on the non-linear EFT framework, also known as Higgs Effective Field Theory (HEFT), and include next-to-leading order (NLO) bosonic operators to study Higgs-related processes at...

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  24. 16. Interplay between LHC and EIC for SMEFT (remote)
    Radja Boughezal, Radja Boughezal (Argonne National Laboratory)
    03/12/2024, 15:20
  25. 21. Power to the RGE!
    Uli Haisch
    03/12/2024, 16:15
  26. 17. Long-distance QCD contributions in rare b→sll decays
    Arianna Tinari
    03/12/2024, 16:40
  27. 22. Probing third-generation New Physics with K→πνν and B→K(∗)νν
    Lukas Allwicher
    03/12/2024, 17:05
  28. 23. EFT in semileptonic decays at LHCb
    Abhijit Mathad (CERN)
    03/12/2024, 17:30
  29. 5. SMEFT meets quantum gravity
    Astrid Eichhorn