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Lukas Born08/06/2026, 14:00
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Anders Eller Thomsen (University of Bern)08/06/2026, 14:30
Recent works have observed spurious divergences in the RG functions of several EFTs. I will show the origin of these divergences and how they can be addressed by including non-minimal source counterterms. Some of the divergences are related to ambiguities introduced by the presence of flavor. I will give an account of how the redundancies in the EFT basis give rise to additional, unphysical...
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Johan Henriksson (CERN)08/06/2026, 14:50
Anomalous dimensions of composite operators determine the running of the corresponding couplings in a general QFT/EFT. They also provide a perturbative estimate of the spectrum of interacting conformal field theories (CFTs) at fixed-points of the RG flow. The latter application motivates the computation of anomalous dimensions of composite operators with growing number of field and derivative...
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Zhe Ren (University of Granada)08/06/2026, 15:10
We compute the one-loop running of dimension-eight two-fermion operators induced by pairs of dimension-six terms and dimension-eight terms in the Standard Model Effective Field Theory (SMEFT). The calculation is performed off shell, for which we obtain and provide a new and explicitly Hermitian basis of dimension-eight Green’s functions. The analysis involves a large set of redundant...
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Costanza Carrivale08/06/2026, 15:30
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Jorge de Blas08/06/2026, 16:30
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CHIARA GIULIANO - (Universidad de Granada)08/06/2026, 17:00
We show that, contrary to common expectations, the observed charged leptons can have a substantial mixing with new heavier fermions, at the level of 20$\%$.
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This can happen, in the language of effective theories, when the effect of mixing with heavier fermions vanishes at tree level in operators of mass-dimension 6 (or it is suppressed by the small charged lepton masses), a cancellation that... -
Gabriele Levati08/06/2026, 17:20
The electric and magnetic dipole moments of the electron and muon provide stringent tests of the Standard Model and sensitive probes of new physics. In contrast, the corresponding dipole moments of the tau lepton, well motivated in scenarios with enhanced couplings to third-generation fermions, remain weakly constrained. In our work, we investigate the potential to probe the tau dipole moments...
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Jaco ter Hoeve (The University of Edinburgh)08/06/2026, 17:40
In the context of the European Strategy, we present projections for the new physics reach of future high-energy colliders using the latest version of the SMEFiT framework, with a focus on near-term electron-positron colliders (FCC-ee, LEP3 and LCF). We quantify their sensitivity to the SMEFT parameter space in a global analysis while accounting for renormalization group evolution effects and...
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Juan Rojo Chacon (Nikhef National institute for subatomic physics (NL))08/06/2026, 18:00
The unprecedented precision expected at the FCC-ee offers unique chances to unveil sought-for New Physics signals. However these "BSM searches" will be very different from current searches at LHC, since signals will appear as subtle deviations between ultra-precise data and theory predictions. A blind applications of the global SMEFT fit is unlikely to be able to resolve these signals due to...
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Mikael Chala09/06/2026, 09:00
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Maria Cristina Fiore (Universidad de Granada)09/06/2026, 09:30
We perform dimensional reduction of the dimension-six SMEFT to order $g^4$ in coupling constants $g$. This analysis includes one-loop contributions to kinetic terms and quartic couplings; as well as two-loop contributions, where operators such as four-fermion interactions first appear, to squared mass terms. Using lattice data, we provide evidence that, in contrast with previous statements in...
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22. Thermal Scalar QED: Finite-Temperature Effective Action and Phase Transition via the Heat-KernelMr Debmalya Dey (IIT Kanpur)09/06/2026, 09:50
We develop a Heat-kernel based formalism to compute the one-loop thermal effective action relevant for dimensionally reduced 3D Thermal EFT matching. Using this framework, we derive the effective operator basis up to dimension six for the Abelian Higgs model, incorporating the non-perturbative effects of the Polyakov loop, which plays a crucial role in shaping the thermal potential. We discuss...
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Mr ADRIÁN Moreno Sánchez (Universidad de Granada)09/06/2026, 10:10
Dimensional reduction is a key tool for computing the electroweak phase transition in scenarios beyond the Standard Model. Achieving high precision in this framework requires the systematic inclusion of higher-dimensional operators in an EFT approach, a task that rapidly becomes technically challenging.
In this work, we show that functional methods provide a highly efficient and scalable...
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Siddhartha Karmakar (IIT Kanpur)09/06/2026, 10:30
We develop a unified, symmetry-based effective field theory (EFT) framework for heavy-light meson systems, combining Hilbert series methods, flavor symmetries, and chiral EFT ideas, with a systematic extension to finite-temperature environments.
We construct a complete and non-redundant operator basis for heavy-light meson EFT using Hilbert series techniques, incorporating symmetry...
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Alejo Rossia09/06/2026, 11:30
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Ella Cole (DAMTP, University of Cambridge)09/06/2026, 12:00
Indirect searches for new physics increasingly rely on precise theoretical predictions in the high-energy tails, with Parton Distribution Functions (PDFs) being one of the main bottlenecks.
In this talk, I explore the interplay between the fits of Standard Model Effective Field Theory (SMEFT) Wilson coefficients and PDFs in two key sectors at the LHC, the Drell-Yan and the top sector. I...
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Mauro Valli (INFN Rome)09/06/2026, 12:20
We present constraints on dimension-6 Standard Model Effective Field Theory (SMEFT) operators from a global fit to electroweak, Drell-Yan, Higgs-boson, top-quark, and flavour observables. The analysis is performed under different flavour symmetry assumptions, including $U(3)^5$ and $U(2)^5$, and considers both global and single-coefficient fits. The scale dependence of the Wilson coefficients...
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Simone Tentori (UCLouvain)09/06/2026, 12:40
SMEFT is a powerful framework to explore imprint of New Physics when the mass of the new states is out of experimental reach. In recent years, significant effort has been devoted to performing global fits in order to correlate deviations observed across different measurements. However, the large dimensionality of the parameter space can limit the sensitivity of this approach and obfuscate the...
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Admir Greljo09/06/2026, 14:30
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Xavier Ponce Diaz (University of Basel)09/06/2026, 15:00
The non-trivial flavour structure of t-channel dark matter models with fermion couplings is unavoidably constrained by flavour physics, hinting towards the presence of an underlying flavour symmetry.
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In this talk, I present a systematic study of the low-energy flavour constraints affecting these models from the perspective of flavour symmetries, together with complementary bounds from... -
Matheus Martines de Azevedo da Silva (Universidade de São Paulo)09/06/2026, 15:20
Since the discovery of the Higgs boson, no clear footprints of New Physics (NP) have been observed at the LHC. This absence suggests a separation between the NP scale and the electroweak scale. In this scenario, Effective Field Theories (EFTs) provide a model-independent framework to analyze LHC and low-energy data and to search for indirect signs of beyond-the-Standard-Model effects. In...
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Arnau Bas I Beneito (Universitat de València (UV, IFIC))09/06/2026, 15:40
In the Standard Model, baryon number is an accidental symmetry, whose violation would constitute unambiguous evidence of new physics, with proton decay providing its most prominent experimental signature. At the same time, the peculiar structure of flavor can serve as a guiding principle for exploring possible new-physics effects. In this talk, I present a systematic classification of...
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Nicola Valori09/06/2026, 16:00
Semi-leptonic processes involving pions are used to test the Standard Model at high precision. On the theory side, the evaluation of radiative corrections is a crucial ingredient for a robust comparison between theoretical predictions and experimental measurements. In this talk, I will present the first complete effective field theory treatment of radiative corrections in pion $\beta$ decay...
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Peter Stoffer09/06/2026, 16:50
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Pol Morell Ferrer (Universitat de Barcelona)09/06/2026, 17:20
After much effort from several groups in the EFT community, most of the two-loop Renormalization Group equations are now known in both the SMEFT and the LEFT. In this project, we have implemented them into the Mathematica package DsixTools, and numerically solved them consistently to NLL precision, together with the already well-known one-loop SMEFT-LEFT matching, in order to generate a...
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Sergio Ferrando Solera09/06/2026, 17:40
Dimensional regularization is nowadays the most used technique to perform loop calculations in Quantum Field Theories. However, it faces some complications when applied to chiral gauge theories such as the Standard Model of particle physics because it is not possible to define a mathematically consistent D-dimensional scheme that preserves gauge symmetries. Nonetheless, for a theory free of...
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Stefano Di Noi (KIT (ITP))09/06/2026, 18:00
In this talk I will present the relation between two distinct prescriptions for $\gamma_5$ in dimensional regularization – the Breitenlohner Maison t’Hooft Veltman (BMHV) scheme and Naive Dimensional Regularisation (NDR) in the SMEFT.
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I will show how the quantum effective action can be translated between both schemes and present these translation rules for the Wilson Coefficients. I will... -
Vera Paroutiadou (ETH Zurich)09/06/2026, 18:20
We revisit the renormalization of generic non-Abelian gauge theories of SU(N) type in the presence of γ₅ within the BMHV scheme. Using algebraic renormalization, we derive the complete structure of one- and two-loop counterterms, including evanescent contributions arising from the non-anticommuting γ₅, and explicitly construct the finite counterterms required to restore BRST symmetry.
As a...
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Joe Davighi10/06/2026, 09:00
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Cristofer Caballeros10/06/2026, 09:30
Effective Field Theories (EFTs) are a framework to probe physics beyond the Standard Model (BSM) in a model independent way. The Standard Model Effective Theory (SMEFT) provides an expansion of higher-dimensional operators that encode the effects of heavy new physics; however, in the operator basis there exists a redundancy in the space of field redefinitions which leaves on-shell amplitudes...
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Andrea Sainaghi (University of Padua)10/06/2026, 09:50
We present a comprehensive reassessment of perturbative unitarity bounds in the dimension-six Standard Model Effective Field Theory, exploiting a new formalism based on spinor-helicity techniques to derive partial-wave unitarity bounds for generic $N \to M$ scattering amplitudes. We find that, in several cases, these theoretical constraints are already competitive with, or even stronger than,...
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Tyler Corbett (University of Vienna)10/06/2026, 10:10
I will discuss recent work in developing the Universal SMEFT approach, this will hopefully include two forthcoming papers:
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1) The relevance of dimension-eight terms in Drell Yan from comparing the top-down and bottom-up approaches.
2) The geometry of the Universal SMEFT and its breaking pattern at one-loop. -
Clara Hernández García (Universidad de Granada)10/06/2026, 10:30
Multi-boson processes are a valuable tool for deepening our understanding of the dynamics of the Higgs boson. In this talk we evaluate if they can be used to shed some light on the question of its transformation under the Standard Model symmetry group. To address this we resort to the application of on-shell amplitude methods to processes involving massive vectors and scalars. We construct the...
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Ramona Grober10/06/2026, 11:30
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Lucine Tabatt10/06/2026, 12:00
The measurement of the Higgs self-coupling is considered the next milestone in the study of the Higgs boson properties.
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At future $e^+e^-$ facilities below the double Higgs production threshold, this is extracted from the $Zh$ production cross-section, which is sensitive to the trilinear coupling at the one-loop level.
At the same perturbative order, potential effects beyond the Standard... -
Mr Sourav Bera (Tata Institute of Fundamental Research, Mumbai)10/06/2026, 12:20
We develop methods to obtain the fully differential cross-section for the $f \bar{f} \to Z(\ell\ell)\,h$ process to any desired order in effective field theory (EFT). 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 partial wave coefficients....
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Samuel Rosende Herrero (IFT UAM-CSIC)10/06/2026, 12:40
We derive partial-wave unitarity constraints on CP-odd operators in the Standard Model Effective Field Theory (SMEFT) that generate genuine anomalous quartic gauge couplings. We consider the complete set of twelve independent dimension-eight CP-odd operators, comprising six mixed field-strength structures and six tensor operators built from dual field strengths.
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We analyze two-to-two... -
Raquel Gomez Ambrosio10/06/2026, 14:30
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Michal Jakub Ryczkowski (Università di Padova and INFN, Sezione di Padova)10/06/2026, 15:00
HEFT-FR is a FeynRules implementation of the Higgs Effective Field Theory (HEFT), designed to facilitate the inclusion of next-to-leading order (NLO) operators in experimental and phenomenological analyses. The model incorporates physical input schemes for the electroweak sector, a consistent power counting prescription, and allows users to select custom subsets of Wilson coefficients for...
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Juan José Sanz-Cillero (Universidad Complutense de Madrid & IPARCOS)10/06/2026, 15:20
We discuss various aspects of multi-boson (H,W,Z) production from longitudinal electroweak (EW) gauge boson scattering in the TeV region as the necessary information to characterise the Flare function, F(h), which determines whether the Standard Model EFT (SMEFT) or the Higgs EFT (HEFT -also sometimes referred as the EW Chiral Lagrangian-) is the appropriate description. We analyze various...
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Carlos Quezada Calonge (Università di Torino)10/06/2026, 15:40
We present MATCHA (MATChing Heft Amplitudes), a package for leading-order (LO) matching of ultraviolet (UV) theories onto the Higgs Effective Field Theory (HEFT). MATCHA uses amplitude-level matching to extract the low-energy parameters of the effective theory, capturing non-decoupling effects of order $\mathcal{O}(1)$. The package supports arbitrary Higgs multiplicities, allowing for a...
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Pablo Olgoso10/06/2026, 16:30
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Guilherme Guedes10/06/2026, 17:00
Dispersion relations connect low-energy EFT amplitudes to UV cross sections, resulting in theoretical constraints on the allowed space of Wilson coefficients. While at dimension eight they result in positivity conditions, at dimension six the indefinite sign of these relations makes it difficult to, a priori, extract useful information. In this work, we show that dispersion relations, when...
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Felix Wilsch (RWTH Aachen University)10/06/2026, 17:20
In this talk, we present a new setup for deriving Feynman rules in generic Beyond the Standard Model (BSM) scenarios, including Effective Field Theories (EFTs), based on the Matchete framework. The Feynman rules can be examined analytically or conveniently exported in the Universal Feynman Output (UFO) format, which can then be interpreted by Monte Carlo event generators. The integration of...
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Luigi C. Bresciani (University of Padova & INFN-PD)10/06/2026, 17:40
I will present the classification of physical operators and the derivation of the complete set of one-loop anomalous dimensions for general EFTs up to dimension six, covering both the bosonic and fermionic sectors. Building on this classification, I will discuss the complete set of leading-order renormalization group equations, computed using unitarity-based on-shell techniques. This analysis...
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Renato Fonseca (University of Granada)10/06/2026, 18:00
Recent work on general effective field theories has provided a framework for the classification of operators in EFTs with arbitrary field content and symmetry structure. In this talk, I will discuss how this setup can be turned into a practical tool for constructing explicit operator bases in specific EFTs. The main idea is to start from the general operator classification and then specialize...
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JAVIER LÓPEZ MIRAS10/06/2026, 18:20
Effective Field Theories (EFTs) are an indispensable framework for capturing the low-energy effects of heavy new physics. While powerful tools like basisgen use Hilbert series methods to elegantly enumerate the exact number of independent operators at a given mass dimension, constructing their explicit tensor forms remains a highly non-trivial and often manual task. This bottleneck complicates...
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Upalaparna Banerjee11/06/2026, 09:00
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Hector Tiblom11/06/2026, 09:30
We carry out a systematic study of a broad class of UV completions of the Standard Model containing vector-like fermions and a complex scalar responsible for spontaneous PQ-symmetry breaking and the emergence of an axion-like particle (ALP). We classify the viable models and match them onto both SMEFT and ALP effective theories, deriving the corresponding low-energy descriptions for each case....
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Álvaro Lozano Onrubia (IFT UAM-CSIC)11/06/2026, 09:50
Axion-like particle (ALP) effective field theories (EFTs) provide a powerful, UV-agnostic framework for studying ALP phenomenology. Phenomenological analyses within this framework typically assume that the ALP mass lies well below the decay constant, i.e. $m_a << f_a$, following standard EFT intuition. In this poster, motivated by the analogous situation in chiral perturbation theory - where...
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Aleks Smolkovic11/06/2026, 10:10
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Victor Maura Breick (King's College London)11/06/2026, 10:40
Linear Standard Model Extensions (LSMEs) are a motivated set of simplified models for exploring the phenomenology of physics beyond the Standard Model (BSM) and assessing the reach of future colliders. They capture a wide range of BSM physics: any particle coupling linearly to the Standard Model (SM) with relevant or marginal interactions is an LSME. Examples include vector-like fermions, new...
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Adam Falkowski11/06/2026, 11:30
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William McNulty (Indiana University)11/06/2026, 12:00
Many experiments have been conducted to search for charged lepton flavor violation (CLFV) and have yielded very strong constraints. At the same time, there has been much interest in neutrino nonstandard interactions (NSI), which could also in general be flavor-violating. However, the direct constraints on NSI are typically rather weak due to the present limitations of neutrino experiments. ...
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Fabian Esser11/06/2026, 12:20
The observation of lepton number violation (LNV) would be clear evidence for physics beyond the Standard Model, and non-zero neutrino masses particularly motivate a study of processes that violate lepton number by two units, like e.g. neutrinoless double beta decay.
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In the Standard Model Effective Field Theory (SMEFT), $\Delta L =2$ operators appear at dimension-5 and higher odd... -
Adriano Lana Cherchiglia (Universidade Estadual de Campinas)11/06/2026, 12:40
Future neutrino experiments, in particular DUNE, are expected to probe new physics through their sensitivity to non-standard neutrino interactions (NSIs), i.e. LEFT/WEFT dimension-six Wilson coefficients. We investigate whether such effects can arise from realistic ultraviolet (UV) models. To this purpose we develop a computational pipeline that connects UV scenarios to phenomenological...
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Fabio Maltoni11/06/2026, 14:30
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Baptiste Ravina11/06/2026, 15:30
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Andrea Visibile11/06/2026, 16:30
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Jin Wang11/06/2026, 17:00
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Clara Del Pio11/06/2026, 17:30
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Eugenia Celada11/06/2026, 18:00
I will present results for the next-to-leading order electroweak corrections to $e^+e^-\to W^+W^-$ from dimension-six two-fermion top-quark operators in the SMEFT.
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I will discuss the analytical computation and show results for future electron–positron colliders, focusing on the proposed LEP3 and FCC-ee that will operate at centre of mass energies below the $t\bar t$ production threshold.
I... -
Mr Subhajit Kala (Indian Institute of Technology Guwahati)11/06/2026, 18:20
We perform a global analysis of top-quark flavour-changing neutral current (FCNC) interactions and the dominant charged-current $(Wtb)$ coupling within an effective field theory framework, incorporating constraints from low-energy flavour observables, electroweak precision data, Higgs and gauge-boson measurements, and electric dipole moment (EDM) bounds. Beginning with a general...
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Jasper Roosmale Nepveu12/06/2026, 09:00
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Dr Andrea Federico Sanfilippo (Universidad de Granada)12/06/2026, 09:30
Soft de Sitter Effective Theory (SdSET) is a promising candidate for the correct effective description of superhorizon modes of quantum fields in de Sitter spacetime. It is especially valuable for achieving control over theories with strong infrared effects. A prototypical example is the massless, minimally coupled scalar field, whose correlation functions are infrared-divergent in...
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Mohammad Alminawi12/06/2026, 09:50
Covariant Feynman rules allow for scattering amplitudes to be expressed in manifestly invariant forms under field redefinition. In this talk the derivation of the covariant rules and their validity at the tree, 1-loop and 2-loop level will be demonstrated. Additionally the use of geometric methods to obtain explicit expressions for the covariant rules will be showcased.
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Wrishik Naskar (DESY)12/06/2026, 10:10
Effective field theories rely on truncated expansions whose interpretation is intertwined with redundancies from field redefinitions. This interplay raises important questions about power counting and the consistent assignment of theoretical uncertainties associated with neglected higher-dimensional operators.
In this talk, I use field redefinition invariance as a diagnostic tool to assess...
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Ignasi Rosell (Universidad CEU Cardenal Herrera)12/06/2026, 10:30
The LHC has established a clear mass gap between the Standard Model particles and possible new states, making effective field theory the natural framework to search for indirect signals of new physics. We adopt the HEFT, the electroweak effective theory in its nonlinear realization, where the Higgs is treated as a singlet with independent couplings. At higher energies we describe possible...
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Konstantin Schmid12/06/2026, 10:50
Higgs pair production offers the opportunity to probe correlations among the couplings of one or two Higgs bosons to fermions and gauge bosons. In this context, it serves as a powerful test of the underlying EFT framework. In this talk, we study Higgs pair production via gluon fusion within the Higgs Effective Field Theory (HEFT) including NLO and NNLO operators. Furthermore, we complement...
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Graeme Crawford12/06/2026, 11:40
We consider a novel class of flavor models where the spurion breaking the flavor symmetries of the Standard Model transforms in a non-minimal irrep. Starting from initial $\mathcal{O}(1)$ untuned entries in the UV, we find that flavor hierarchies can be generated accidentally via multiple insertions of the spurion. By considering non-Abelian symmetries, we show that the pattern of...
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Santiago Paz Castro (Universitat de València)12/06/2026, 12:00
Semileptonic τ decays mainly proceed via interactions between charged lepton and quark currents. The hadronization of the quark current is intrinsically nonperturbative and generally cannot be addressed analytically. In this work, we propose using symmetry arguments alone to construct clean angular observables that, within the Standard Model and in the absence of long-distance electromagnetic...
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