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01/12/2025, 13:55
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Bo Fang (University of Chinese Academy of Sciences (CN))01/12/2025, 14:00
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Leo Boudet (Centre National de la Recherche Scientifique (FR))01/12/2025, 14:35
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Saptaparna Bhattacharya (Southern Methodist University (US))01/12/2025, 15:10
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Pablo Olgoso Ruiz (University of Padova)01/12/2025, 16:15
We present the latest results in the renormalization of general Effective Field Theories. After describing the most general local, Lorentz-invariant, effective field theory of scalars, fermions and gauge bosons (up to mass dimension 6), we obtain a Green’s and a physical basis, the reduction of the former to the latter, and the renormalization group equations at one-loop order.
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Jasper Roosmale Nepveu (National Taiwan University)01/12/2025, 16:40
Positivity bounds constrain the parameter space of effective field theories (EFTs) at low energies, relying only on basic principles of the underlying high-energy dynamics. To complement experimental studies with these bounds, it is important to understand their robustness under loop corrections and across different energy scales. In this talk, I will present a general result that determines...
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Alon Lifshits01/12/2025, 17:05
General Relativity (GR) continues to provide an exceptionally accurate description of gravitational phenomena at macroscopic scales. Yet its reconciliation with quantum mechanics remains elusive [1]. A compelling strategy treats GR as a low-energy Effective Field Theory (EFT), seeking its high-energy extension.
Progress in this direction would require matching candidate UV theories to the...
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Johan Henriksson (CERN)01/12/2025, 17:30
In EFT, the computation of anomalous dimensions of composite operators in $4-\epsilon$ dimensions is central. Precisely this computation has a completely different application, namely to the $\epsilon$-expansion of conformal field theories (CFTs), where instead of taking $\epsilon\to0$ one is interested in results for 3d theories at $\epsilon=1$. Anomalous dimensions of composite operators...
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Konstantin Schmid (University and INFN Padova)02/12/2025, 09:00
In searches for beyond the Standard Model (BSM) Physics, bottom-up effective field theories (EFTs) such as the Standard Model EFT (SMEFT) and Higgs EFT (HEFT) have become crucial theoretical tools. Besides specifying their particle content and the respective symmetries on which the higher-dimensional operators are built, the choice of a power counting in a small parameter is the third...
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Susobhan Chattopadhyay (Tata Institute of Fundamental Research (TIFR), Mumbai)02/12/2025, 09:25
We consider a scalar theory with an $(N_{GB} + 1)$-plet undergoing spontaneous symmetry breaking $SO(N_{GB} + 1) \to SO(N_{GB})$, with interactions governed by a general potential $V$. Using geometric methods, we compute the high-energy leading term of all scattering amplitudes involving arbitrary numbers of Higgs-like and Goldstone bosons. This infinite set of amplitudes allows us to derive...
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Lukas Born02/12/2025, 09:50
The Standard Model Effective Field Theory (SMEFT) provides a powerful framework for parameterizing potential new physics in a model-independent way. To analyze data from experiments across different energy scales and to reliably extrapolate ultraviolet (UV) physics effects, it is crucial to know the renormalization group evolution (RGE) of SMEFT operators.
In this talk, I will present the...
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Barbara Anna Erdelyi (Università degli Studi di Padova and INFN Sezione di Padova)02/12/2025, 10:15
In this work we extend the existing literature on two-loop renormalisation group equations (RGEs) for the dimension-six Standard Model Effective Field Theory operator involving two gluons and two Higgs bosons. This operator generates an effective coupling between the Higgs boson and gluons. In particular, we extend and complete the contributions that enter the RGEs proportionally to $g_s^2...
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Jaco ter Hoeve (University of Edinburgh)02/12/2025, 11:10
We present projections for the New Physics reach of future high-energy colliders in the SMEFiT framework. Our analysis focuses on near-term electron–positron colliders (FCC-ee, LEP3, CEPC, LCF), complemented in some cases by projections for the FCC-hh, LHeC, and MuCol. Results are presented in terms of coupling modifiers (kappa-formalism), effective couplings, and global SMEFT fits, the latter...
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Aleks Smolkovic (Jozef Stefan Institute)02/12/2025, 11:35
The Standard Model Effective Field Theory (SMEFT) has proven to be a valuable framework for studying a broad class of models beyond the SM containing heavy degrees of freedom. The phenomenology of SMEFT can be developed systematically, incorporating essential effects such as Renormalization Group (RG) evolution and matching onto subsequent low-energy Weak Effective Field Theories (WET),...
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Marko Pesut (University of Zürich)02/12/2025, 12:00
We derive the complete set of two-loop anomalous dimensions describing the mixing of four-fermion operators in the Low Energy Effective Field Theory (LEFT). The calculation is performed in Naive Dimensional Regularization with anticommuting $\gamma_5$ (the NDR scheme), and the results are given in the "JMS basis" of dimension-six operators. The derivation relies on known results for UV poles...
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Shakeel Ur Rahaman02/12/2025, 14:30
In the SMEFT framework, we calculated QCD and EW corrections at NLO to the Higgs decay to a $b \bar b $ pair. To accurately simulate this process for the LHC, we implemented the matrix element into Sherpa. This allows us to study how the parton shower affects those hard matrix elements.
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Alejo Nahuel Rossia (University of Padua and INFN Sezione di Padova), Michal Jakub Ryczkowski (Università di Padova and INFN, Sezione di Padova)02/12/2025, 14:55
The precise measurement of the Higgs boson properties requires a robust framework to parametrize possible deviations from Standard Model (SM) predictions in the most model-independent way possible. The Effective Field Theory (EFT) framework has become the most widely used since it offers a broad scope and a consistent path to increase the precision of the computations. Two prominent EFTs are...
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Sudeepan Datta (Paul Scherrer Institute (CH))02/12/2025, 15:20
In this talk, we shall discuss the automation of operator basis changes for effective field theories with arbitrary gauge symmetries and matter content. In particular, we shall describe the workflow, where we start with performing basis changes at the tree level using IBP, completeness relations, and Fierz identities, with the eventual aim of performing completely general basis changes at the...
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David William Sutherland (University of Glasgow (GB)), William Shepherd02/12/2025, 16:15
This will start with a summary of the problem of truncation and EFT validity, and a summary of proposed solutions and the current treatment in experimental searches. The aim is to stimulate discussion on what the EFT WG can usefully do next on this issue.
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Mr Sourav Bera (Tata Institute of Fundamental Research, Mumbai)
We construct differential observables that can probe effective field theory (EFT) effects in the Higgstrahlung process, $pp \to Z(ll)\,h$, to all orders in the EFT expansion. To achieve this, we first derive a mapping between the partial wave expansion and the EFT expansion to all orders. We find that at lower orders, EFT predicts correlations between the different helicity amplitudes. This...
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Michal Jakub Ryczkowski (Università di Padova and INFN, Sezione di Padova)
Double Higgs production via vector boson fusion (VBF), though suppressed compared to the gluon fusion channel, provides a sensitive probe of electroweak symmetry breaking and possible BSM dynamics. We investigate the effects of dimension-6 and dimension-8 SMEFT operators—particularly those involving derivative interactions—on this process. Using global-fit constraints, and taking into account...
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Victor Miralles (University of Manchester)
We present results from a global fit of Standard Model parameters and dimension-6 SMEFT Wilson coefficients that includes electroweak, Drell-Yan, Higgs-boson, top-quark, and flavour observables. Fits obtained by floating individual coefficients are also discussed. The leading-order scale dependence of the SMEFT Wilson coefficients is consistently included in the evolution from the UV scale to...
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Sofia Giappichini (KIT - Karlsruhe Institute of Technology (DE))
The Future Circular Collider (FCC-ee), a key pillar of the European Strategy for Particle Physics, offers unprecedented precision for studying the Higgs boson. The decay $H \to \tau\tau$ stands out due to its sizable branching ratio, clean experimental environment, and sensitivity to tau polarization, making it an ideal channel to probe the CP properties of the Yukawa couplings and search for...
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