SMEFT goes dark: Dark Matter models for four-fermion operators

Cepedello, Ricardo; Esser, Fabian; Hirsch, Martin; Sanz, Veronica

doi:10.1007/jhep09(2023)081

Cited by 4 publications

(1 citation statement)

References 73 publications

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“…See[12] for a related analysis and[13,14] for recent efforts towards the calculation of the dictionary for four-fermion interactions. See also[15][16][17] for results on generic UV extensions for a set of operators in the low energy EFT (LEFT) 2.…”

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confidence: 99%

Towards the one loop IR/UV dictionary in the SMEFT: One loop generated operators from new scalars and fermions

Guedes,

Olgoso,

Santiago

2023

SciPost Phys.

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Effective field theories offer a rationale to classify new physics models based on the size of their contribution to the effective Lagrangian, and therefore to experimental observables. A complete classification can be obtained, at a fixed order in perturbation theory, in the form of IR/UV dictionaries. We report on the first step towards the calculation of the one loop, dimension 6 IR/UV dictionary in the SMEFT. We consider dimension-six operators in the SMEFT that cannot be generated at tree level in weakly coupled extensions of the Standard Model. This includes operators with three gauge field strength tensors, operators with two field strength tensors and two scalar fields and dipole operators. We provide a complete classification of renormalizable extensions of the Standard Model with new scalar and fermion fields that contribute to these operators at one loop order, together with their explicit contribution. Our results are encoded in a Mathematica package called SOLD (SMEFT One Loop Dictionary), which includes further functionalities to facilitate the calculation of the complete tree level and one loop matching of any relevant model via an automated interface to matchmakereft. All operators in our list are indeed generated at the one loop order in the extensions considered with the exception of CP-violating ones with three field-strength tensors.

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confidence: 99%

Towards the one loop IR/UV dictionary in the SMEFT: One loop generated operators from new scalars and fermions

Guedes,

Olgoso,

Santiago

2023

SciPost Phys.

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Going beyond Top EFT

Lessa,

Sanz

2024

J. High Energ. Phys.

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We present a new way to interpret Top Standard Model measurements going beyond the SMEFT framework. Instead of the usual paradigm in Top EFT, where the main effects come from tails in momenta distributions, we propose an interpretation in terms of new physics which only shows up at loop-level. The effects of these new states, which can be lighter than required within the SMEFT, appear as distinctive structures at high momenta, but may be suppressed at the tails of distributions. As an illustration of this phenomena, we present the explicit case of a UV model with a $$ \mathcal{Z} $$ Z 2 symmetry, including a Dark Matter candidate and a top-partner. This simple UV model reproduces the main features of this class of signatures, particularly a momentum-dependent form factor with more structure than the SMEFT. As the new states can be lighter than in SMEFT, we explore the interplay between the reinterpretation of direct searches for colored states and Dark Matter, and Top measurements, made by ATLAS and CMS in the differential $$ t\overline{t} $$ t t ¯ final state. We also compare our method with what one would expect using the SMEFT reinterpretation, finding that using the full loop information provides a better discriminating power.

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HighTEA: high energy theory event analyser

Czakon,

Kassabov,

Mitov

et al. 2024

J. Phys. G: Nucl. Part. Phys.

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We introduce HighTEA, a new paradigm for deploying fully-diﬀerential next-to-next-to leading order (NNLO) calculations for collider observables. In principle, any infrared safe observable can be computed and, with very few restrictions, the user has complete freedom in deﬁning their calculation’s setup. For example, one can compute generic n-dimensional distributions, can deﬁne kinematic variables and factorization/renormalization scales, and can modify the strong coupling and parton distributions. HighTEA operates on the principle of analyzing precomputed events. It has all the required hardware and software infrastructure such that users only need to request their calculation via the internet before receiving the results, typically within minutes, in the form of a histogram. No specialized knowledge or computing infrastructure is required to fully utilize HighTEA, which could be used by both experts in particle physics and the general public. The current focus is on all classes of LHC processes. Extensions beyond NNLO, or to e+e- colliders, are natural next steps.

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SMEFT goes dark: Dark Matter models for four-fermion operators

Cited by 4 publications

References 73 publications

Towards the one loop IR/UV dictionary in the SMEFT: One loop generated operators from new scalars and fermions

Towards the one loop IR/UV dictionary in the SMEFT: One loop generated operators from new scalars and fermions

Going beyond Top EFT

HighTEA: high energy theory event analyser

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