Effective operator bases for beyond Standard Model scenarios: an EFT compendium for discoveries

Banerjee, Upalaparna; Chakrabortty, Joydeep; Prakash, Suraj; Rahaman, Shakeel Ur; Spannowsky, Michael

doi:10.1007/jhep01(2021)028

Cited by 16 publications

(4 citation statements)

References 137 publications

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“…Recent analyses aim at interpreting global SMEFT fits in terms of concrete UV extensions of the Standard Model [4][5][6][7][8] or classify UV completions by exploiting the symmetries of the effective theory [9,10]. Whatever the approach, the key question is: what can we learn from data about the possible structure of UV physics?…”

Section: Jhep05(2021)257mentioning

confidence: 99%

The flavor of UV physics

Bruggisser

Schäfer

Dyk

et al. 2021

J. High Energ. Phys.

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New physics not far above the TeV scale should leave a pattern of virtual effects in observables at lower energies. What do these effects tell us about the flavor structure of a UV theory? Within the framework of the Standard Model Effective Field Theory (SMEFT), we resolve the flavor structure of the Wilson coefficients in a combined analysis of top-quark and B-physics observables. We assume that the Yukawa couplings are the only sources of flavor symmetry breaking, a framework known as Minimal Flavor Violation. Our fits to LHC and b-factory measurements show that combining top and bottom observables is crucial to pin down possible sources of flavor breaking in a UV theory. This analysis includes the full analytic expansion of SMEFT coefficients in Minimal Flavor Violation and a detailed study of SMEFT effects in b → s flavor transitions.

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Section: Jhep05(2021)257mentioning

confidence: 99%

The flavor of UV physics

Bruggisser

Schäfer

Dyk

et al. 2021

J. High Energ. Phys.

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“…classes such as D 2 X 2 , ψ 2 φ D 2 etc., are often taken into account to describe specific phenomenological processes but these can be expressed as linear combinations of elements of the Warsaw-like basis as shown below [3,57]:…”

Section: Jhep06(2021)033mentioning

confidence: 99%

EFT diagrammatica: UV roots of the CP-conserving SMEFT

Bakshi

Chakrabortty

Prakash

et al. 2021

J. High Energ. Phys.

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The Standard Model Effective Field Theory (SMEFT) is an established theoretical framework that parametrises the impact a UV theory has on low-energy observables. Such parametrization is achieved by studying the interactions of SM fields encapsulated within higher mass dimensional (≥ 5) operators. Through judicious employment of the tools of EFTs, SMEFT has become a source of new predictions as well as a platform for conducting a coherent comparison of new physics (beyond Standard Model) scenarios. We, for the first time, are proposing a diagrammatic approach to establish selection criteria for the allowed heavy field representations corresponding to each SMEFT operator. We have elucidated the links of a chain connecting specific CP conserving dimension-6 SMEFT operators with unique sets of heavy field representations. The contact interactions representing each effective operator have been unfolded into tree- and (or) one-loop-level diagrams to reveal unique embeddings of heavy fields within them. For each case, the renormalizable vertices of a UV model serve as the building blocks for all possible unfolded diagrams. Based on this, we have laid the groundwork to construct observable-driven new physics models. This in turn also prevents us from making redundant analyses of similar models. While we have taken a predominantly minimalistic approach, we have also highlighted the necessity for non-minimal interactions for certain operators.

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“…In Eq. ( 1), we also include effective operators that parametrise the new interactions between charged scalar and SM fields [18]. In Tab.…”

Section: The Modelmentioning

confidence: 99%

Extended Higgs boson sectors, effective field theory, and Higgs boson phenomenology

et al. 2021

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We consider the phenomenological implications of charged scalar extensions of the SM Higgs sector in addition to EFT couplings of this new state to SM matter. We perform a detailed investigation of modifications of loop-induced decays of the 125 GeV Higgs boson, which receives corrections from the propagating charged scalars alongside one-loop EFT operator insertions and demonstrate that the interplay of H → γγ and H → Zγ decays can be used to clarify the additional states phenomenology in case a discovery is made in the future. In parallel, EFT interactions of the charged Higgs can lead to a decreased sensitivity to the virtual presence of charged Higgs states, which can significantly weaken the constraints that are naively expected from the precisely measured H → γγ branching ratio. Again H → Zγ measurements provide complementary sensitivity that can be exploited in the future.

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Effective operator bases for beyond Standard Model scenarios: an EFT compendium for discoveries

Cited by 16 publications

References 137 publications

The flavor of UV physics

The flavor of UV physics

EFT diagrammatica: UV roots of the CP-conserving SMEFT

Extended Higgs boson sectors, effective field theory, and Higgs boson phenomenology

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