-
Eleni Vryonidou (University of Manchester (GB))19/06/2023, 09:00
-
Gauthier Durieux (CERN)19/06/2023, 09:10
-
Adam Orion Martin (University of Notre Dame (US))19/06/2023, 09:45
The geometric re-organization of the SMEFT (geoSMEFT) has facilitated calculations of higher order corrections O(1/\Lambda^4) and beyond to important collider processes. These higher order results can be used as laboratories for truncation uncertainty/EFT validity. In this talk, I will highlight some of the takeaway messages, focusing on O(1/\Lambda^4) calculations of Drell Yan, associated...
Go to contribution page -
Mohammad Alminawi19/06/2023, 10:15
Recent theory developments showed that the interplay between HEFT and SMEFT can be conveniently studied using differential geometry methods, where non-derivative field redefinitions are interpreted as coordinate changes on a 4D manifold. This approach is typically restricted to the study of the 2-derivative Lagrangian.
Go to contribution page
We introduce a possible strategy to extend the geometric interpretation to... -
Eleonora Rossi (University of Oxford (GB))19/06/2023, 11:00
-
Ennio Salvioni (Universita e INFN, Padova (IT))19/06/2023, 11:35
-
MIA,ROBIN,BYRON WEST19/06/2023, 12:05
The Standard Model Effective Field Theory (SMEFT), where the Higgs doublet transforms linearly under electroweak symmetry, has gained popularity in the last decade for classifying the low-energy effects of heavy, new physics on experimental results. However, the SMEFT is not as general an Effective Field Theory as the Higgs EFT (HEFT), where the Higgs doublet transforms non-linearly. The...
Go to contribution page -
Brian Quinn Henning19/06/2023, 14:00
-
Xiaochuan Lu (University of Oregon)19/06/2023, 14:30
-
Dr SUPRATIM DAS BAKSHI (Granada University)19/06/2023, 15:00
In my presentation, I shall discuss the Renormalisation Group (RG) running of the Standard Model Effective Field Theory (SMEFT) bosonic sector at 1-loop level up to order 1/Λ4, where Λ is the SMEFT cut-off scale. Specifically, I will explore the contributions from dimension eight operators that are tree-level generated and Lepton Number Violating operators (LNVs) at...
Go to contribution page -
Jasper Roosmale Nepveu (Humboldt University Berlin)19/06/2023, 15:30
Based on [2105.12742, 2303.07391] and upcoming work, I will discuss various aspects of the renormalization of scalar effective field theory (EFT). For single insertions of EFT operators, we computed anomalous dimensions at five loop order and high mass dimension using the R* method. For multiple insertions, we present three-loop results and a general non-renormalization theorem that dictates...
Go to contribution page -
Mikael Chala (Universidad de Granada)19/06/2023, 16:15
-
Hongkai Liu (University of Pittsburgh (US))19/06/2023, 16:45
-
Marc Riembau Saperas (CERN)19/06/2023, 17:15
-
Teng Ma, Mr Teng Ma (Institut de Física d'Altes Energies (IFAE))19/06/2023, 17:45
Massive field EFTs are widely used in particle physics, but how to construct massive field operators efficiently remains a challenge. We propose a general theory to solve this problem based on the scattering amplitude theory. We find that the complete set of EFT bases can be systematically constructed using the Lorentz subgroup SU(2) and global symmetry U(N), where N represents the number of...
Go to contribution page -
Duarte Fontes20/06/2023, 09:00
Although LHC physics can be parametrized in a general and consistent way using an effective field theory (EFT) framework, two different approaches have been advocated in the literature: the Higgs EFT (HEFT) and the Standard Model EFT (SMEFT). In this talk, I compare the two alternatives in the context of particular models. Specifically, I consider the singlet extension of the Standard Model as...
Go to contribution page -
Manuel Morales20/06/2023, 09:30
The DGLAP equations describe how parton distribution functions evolve between different energy scales. In this talk, I will discuss how potential effects of New Physics, parametrised in terms of higher dimensional operators in the Standard Model Effective Field Theory, could affect these equations. We assess the importance of these operators in the calculation of the splitting functions, and...
Go to contribution page -
Jaco ter Hoeve (Nikhef and VU Amsterdam)20/06/2023, 09:50
Theoretical interpretations of particle physics data, such as the determination of the Wilson coefficients of the Standard Model Effective Field Theory (SMEFT), often involve the inference of multiple parameters from a global dataset. Optimising such interpretations requires the identification of observables that exhibit the highest possible sensitivity to the underlying theory parameters....
Go to contribution page -
Tommaso Giani20/06/2023, 10:10
The Standard Model Effective Field Theory (SMEFT) provides a robust framework to interpret experimental measurements in the context of new physics scenarios while minimising assumptions on the nature of the underlying UV-complete theory. We present the Python open source SMEFiT framework, designed to carry out parameter inference in the SMEFT within a global analysis of particle physics data....
Go to contribution page -
Martin Gonzalez-Alonso (CERN)20/06/2023, 11:00
-
Marion Thomas20/06/2023, 11:30
We study the loop-level gluon-fusion diboson production in the SMEFT framework. We compute analytically the helicity amplitudes for all dimension-6 operators and identify those that generate growth with energy and hence can be better constrained. Additionally, we perform a phenomenological analysis of gluon-fusion Zh production at HL-LHC, combining it for the first time with quark-initiated Zh...
Go to contribution page -
Mr Carlos Quezada Calonge (Universidad Complutense de Madrid)20/06/2023, 11:50
We study the one-loop corrections to Vector Boson Scattering within the framework of effective theories. We focus our attention on fermion-loop corrections which scale like $\mathcal{O}(s/v^4)$ in the Higgs Effective Field Theory (HEFT). Although this dependency is formally suppressed for $s \rightarrow \infty$ with respect to that from boson loops, the large top mass can lead to a numerical...
Go to contribution page -
Tommy Smith20/06/2023, 12:10
The choice of an electroweak (EW) input scheme is an important component of perturbative calculations in Standard Model Effective Field Theory (SMEFT). We perform a systematic study of three different EW input schemes in SMEFT, in particular those using the parameter sets $\{M_W, \, M_Z, \, G_F\}$, $\{M_W, \, M_Z, \, \alpha\}$, or $\{\alpha, \, M_Z, \, G_F\}$. We discuss general features and...
Go to contribution page -
LUIGI BELLAFRONTE (IGFAE)20/06/2023, 14:00
Effective field theory tools are essential for exploring non-Standard Model physics at the LHC in the absence of the discovery of new light particles. Predictions for observables are typically made at the lowest order in the QCD and electroweak expansions in the Standard Model effective field theory (SMEFT) and often ignore the effects of flavor. In this talk I will present results for...
Go to contribution page -
Aleks Smolkovic20/06/2023, 14:20
-
David Díaz Calderón20/06/2023, 14:50
This talk is based on the results of JHEP 04 (2022) 152. In this article, an analysis of light-quark semileptonic transitions is carried out in an Effective Field Theory framework. That is, model-independent bounds on new physics are obtained for the following data sets: semi-leptonic tau decays, pion decays, kaon decays and nuclear beta decays. Subsecuently, a global combination of...
Go to contribution page -
Emanuele Gendy Abd El Sayed20/06/2023, 15:10
In the electroweak sector of the Standard Model, CP violation arises through a very particular interplay between the three quark generations, as described by the CKM mechanism and the single Jarlskog invariant $J_4$. Once generalized to the Standard Model Effective Field Theory (SMEFT), this peculiar pattern gets modified by higher-dimensional operators, whose associated Wilson coefficients...
Go to contribution page -
Kirill Skovpen (Ghent University (BE))20/06/2023, 16:00
-
Ilaria Brivio (University of Zurich)20/06/2023, 16:35
-
Hesham El Faham (The University of Manchester)20/06/2023, 16:55
We study four top quark production at hadron colliders in the Standard Model Effective Field Theory (SMEFT). We perform an analysis at the tree-level, including all possible QCD- and EW-coupling orders and relevant dimension-six operators. We find several cases where formally subleading terms give rise to significant contributions, potentially providing sensitivity to a broad class of...
Go to contribution page -
Victor Miralles (INFN sezione di Roma)20/06/2023, 17:25
In this work the prospects for measurements of the top-quark couplings at future colliders are presented. Projections are presented for the high luminosity phase of the Large Hadron Collider and a future Higgs/electroweak/top factory lepton collider. Results are presented for the expected bounds on Wilson coefficients of the relevant SMEFT operators from a global fit to the top-quark sector.
Go to contribution page -
James Moore20/06/2023, 17:55
We assess the impact of top quark production at the LHC on global analyses of parton distributions (PDFs) and of Wilson coefficients in the SMEFT, both separately and in the framework of a joint interpretation. We consider the broadest top quark dataset to date containing all available measurements based on the full Run II luminosity. First, we determine the constraints that this dataset...
Go to contribution page -
Guilherme Guedes (DESY)21/06/2023, 09:00
Effective field theories offer a rationale for the classification of heavy new physics models based on the size of their contribution to the effective Lagrangian and therefore to experimental observables. When trying to connect theory with experiment, dictionaries which relate possible UV scenarios with the relevant effective interactions are of utmost importance.
Go to contribution page
In this talk, I will report... -
Anders Eller Thomsen (Universität Basel)21/06/2023, 09:30
The low-energy phenomenology of high-scale new physics is best captured with effective field theories (EFTs). Evanescent operators - operators that vanish in 4D - show up at intermediate steps in the matching calculations used to determine the specific EFT coefficients. Although seemingly unphysical, evanescent operators lead to finite physical effects, which must be accounted for. This...
Go to contribution page -
John Gargalionis (The University of Melbourne)21/06/2023, 10:00
Linear Standard Model (SM) extensions, defined as new particles that can
Go to contribution page
couple linearly to SM fields, form a motivated subset of simplified models for
exploring phenomenology beyond the SM (BSM). Their linear couplings enable
them to be singly produced at colliders and searched for directly. To take full
advantage of the complementarity between direct searches at high energy and
indirect... -
Julie Pagès (University of California, San Diego)21/06/2023, 11:00
-
Mr ÁLVARO DÍAZ CARMONA21/06/2023, 11:30
We present a basis of dimension-eight Green’s functions involving Standard Model (SM) bosonic fields, consisting of 86 new operators. Instead of using algebraic identities and integration by parts, we prove the independence of these interactions in momentum space, commenting about evanescent operators as well.
Go to contribution page
In this talk, we show our method to construct a Green's Basis and our application... -
Fabian Esser21/06/2023, 11:50
The top-down matching of specific scenarios for new physics onto the Standard Model Effective Field Theory (SMEFT) is well-understood and easy to automise.
Go to contribution page
The inverse approach, however, the bottom-up matching of the SMEFT to UV models and in particular a systematic exploration of these discoverable UV models is more difficult.
I will present a diagrammatic technique for the automated... -
Michal Ryczkowski21/06/2023, 12:10
SmeftFR v3 [2302.01353, https://www.fuw.edu.pl/smeft/] enables derivation of Feynman rules for interaction vertices from the dimension-5, dimension-6 and (so far) all bosonic dimension-8 SMEFT operators which can be further easily used in numerical or symbolic calculations e.g. in Madgraph or FeynArts. There are many changes in comparison to the previous version of the code and its scope of...
Go to contribution page -
Anke Biekoetter (JGU Mainz)21/06/2023, 14:00
In the presence of axions and axion-like particles (ALPs) that couple to the Standard Model via non-renormalisable dimension-5 operators, non-zero Wilson coefficients (WCs) of the Standard Model effective field theory (SMEFT) are induced by renormalisation group evolution. Since many of the SMEFT WCs are experimentally constrained, this ALP-SMEFT interference allows to derive indirect bounds...
Go to contribution page -
James Ingoldby (ICTP (Trieste))21/06/2023, 14:30
In this talk, I review recent work developing dilaton effective field theory (EFT), which provides a framework for describing the Higgs boson as composite state. The EFT describes a multiplet of pseudo-Goldstone bosons which arise when an approximate global symmetry gets spontaneously broken, as well as a dilaton - a pseudo-Goldstone boson arising from the spontaneous breaking of an...
Go to contribution page -
Gabriel Massoni Salla21/06/2023, 15:00
Dark photons are massive abelian gauge bosons that interact with ordinary photons via a kinetic mixing with the hypercharge field strength tensor. This theory is probed by a variety of different experiments and limits are set on a combination of the dark photon mass and kinetic mixing parameter. These limits can however be strongly modified by the presence of additional heavy degrees of...
Go to contribution page
Choose timezone
Your profile timezone: