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Related papers: Hilbert series for ALP EFTs

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We introduce a systematic method to classify the Standard Model Effective Field Theory (SMEFT) operators based on their CP properties with the Hilbert series techniques. Our method makes it possible to enumerate operators violating CP…

High Energy Physics - Phenomenology · Physics 2023-09-21 Dan Kondo , Hitoshi Murayama , Risshin Okabe

In the presence of an axion or axion-like particle (ALP) that couples to the Standard Model via dimension-five interactions, dimension-six SMEFT interactions are generated via renormalization-group evolution. As many of these SMEFT…

High Energy Physics - Phenomenology · Physics 2023-10-02 Anke Biekötter , Javier Fuentes-Martín , Anne Mareike Galda , Matthias Neubert

The impact of axion-like particles (ALPs) on the search of permanent electric dipole moments (EDMs) of molecules, atoms, nuclei and nucleons is systematically investigated. We classify first the full set of CP-violating Jarlskog invariants…

High Energy Physics - Phenomenology · Physics 2021-12-07 Luca Di Luzio , Ramona Gröber , Paride Paradisi

We study axion-like particles (ALPs) whose dominant interactions are with gluons and third-generation quarks, and whose couplings to light Standard Model (SM) particles arise at one loop. These loop-induced effects lead to ALP decays and…

High Energy Physics - Phenomenology · Physics 2025-09-01 Jon Butterworth , Matthew Cullingworth , Joseph Egan , Fabian Esser , Veronica Sanz , Maria Ubiali

We expand Hilbert series technologies in effective field theory for the inclusion of massive particles, enabling, among other things, the enumeration of operator bases for non-linearly realized gauge theories. We find that the Higgs…

High Energy Physics - Phenomenology · Physics 2023-03-01 Lukáš Gráf , Brian Henning , Xiaochuan Lu , Tom Melia , Hitoshi Murayama

We study the interactions of Axion-Like Particles (ALPs) with the Standard Model particles, aiming to probe their phenomenology via non-resonant searches at the LHC. These interactions are mediated by higher dimensional effective operators…

High Energy Physics - Phenomenology · Physics 2024-05-09 Tisa Biswas

The Standard Model Effective Field Theory (SMEFT) offers a powerful theoretical framework for parameterizing the low-energy effects of heavy new particles with masses far above the scale of electroweak symmetry breaking. Additional light…

High Energy Physics - Phenomenology · Physics 2021-06-17 Anne Mareike Galda , Matthias Neubert , Sophie Renner

Axion-like particles (ALPs) provide a well-motivated framework for physics beyond the Standard Model, coupling to gauge bosons through dimension-five operators protected by an approximate shift symmetry. At the LHC, such interactions lead…

High Energy Physics - Phenomenology · Physics 2025-10-30 Fabian Esser , Alexandre Salas-Bernardez , Maria Ubiali , Veronica Sanz

Axions and axion-like particles (ALPs) are well-motivated low-energy relics of high-energy extensions of the Standard Model, which interact with the known particles through higher-dimensional operators suppressed by the mass scale $\Lambda$…

High Energy Physics - Phenomenology · Physics 2021-04-28 Martin Bauer , Matthias Neubert , Sophie Renner , Marvin Schnubel , Andrea Thamm

Axion-like particles (ALPs) appear from spontaneous global symmetry breaking in many extensions of the Standard Model (SM). In this paper, we find bounds on ALP ($a$) model parameters at the LHC from the ALP production associated with a…

High Energy Physics - Phenomenology · Physics 2019-07-24 Javad Ebadi , Sara Khatibi , Mojtaba Mohammadi Najafabadi

We give an overview of collider searches for Axion-like particles (ALPs). The intention of this review is to give a pedagogical introduction to collider phenomenology of ALPs, and provide a starting point for newcomers, including suitable…

High Energy Physics - Phenomenology · Physics 2025-08-28 Anke Biekötter , Ken Mimasu

In this work, prospects to probe an overlooked facet of axion-like particles (ALPs) -- their potential couplings to sterile neutrinos -- are presented. We found that mono-photon searches have the potential to constrain ALP couplings to…

High Energy Physics - Phenomenology · Physics 2020-08-18 Alexandre Alves , Alex G. Dias , Diego D. Lopes

Effective Field Theory technique is one of the most elegant ways to capture the impact of high scale theory, if any, at some low energy by incorporating higher mass dimensional ($\geq 5$) effective operators ($\mathcal{O}_i$). The low…

High Energy Physics - Phenomenology · Physics 2019-10-02 Anisha , Supratim Das Bakshi , Joydeep Chakrabortty , Suraj Prakash

This work delves into the study of flavor invariants and, in special, invariants capable of detecting CP (Charge-Parity) violation. Through the mathematical tool of the Hilbert series, we systematically enumerate and explore flavor…

High Energy Physics - Phenomenology · Physics 2024-11-26 Eduardo Lourenço Fabio de Lima

Accidental symmetries in effective field theories can be established by computing and comparing Hilbert series. This invites us to study them with the tools of invariant theory. Applying this technology, we spotlight three classes of…

High Energy Physics - Phenomenology · Physics 2024-12-10 Benjamín Grinstein , Xiaochuan Lu , Carlos Miró , Pablo Quílez

We compute the renormalization group equations (RGEs) of the Standard Model effective field theory (EFT) extended with a real scalar singlet, up to dimension-five and one-loop accuracy. We compare our renormalization results with those…

High Energy Physics - Phenomenology · Physics 2024-04-30 Supratim Das Bakshi , Jonathan Machado-Rodríguez , Maria Ramos

Relativistic quantum systems that admit scattering experiments are quantitatively described by effective field theories, where $S$-matrix kinematics and symmetry considerations are encoded in the operator spectrum of the EFT. In this paper…

High Energy Physics - Theory · Physics 2017-11-22 Brian Henning , Xiaochuan Lu , Tom Melia , Hitoshi Murayama

Axion-like particles (ALPs), which are gauge-singlets under the Standard Model (SM), appear in many well-motivated extensions of the SM. Describing the interactions of ALPs with SM fields by means of an effective Lagrangian, we discuss ALP…

High Energy Physics - Phenomenology · Physics 2018-01-17 Martin Bauer , Matthias Neubert , Andrea Thamm

Searches for charge-parity (CP) violating interactions of the Standard Model (SM) Higgs boson are a key priority of the LHC physics program. Experimental results from ATLAS and CMS are often reinterpreted within a variety of theoretical…

High Energy Physics - Phenomenology · Physics 2026-05-14 Daniele Barducci , Matthew Forslund , Marta Fuentes Zamoro , Pier Paolo Giardino , Andrei V. Gritsan , Giacomo Ortona

Axion-like particles (ALPs) are pseudo Nambu-Goldstone bosons associated with spontaneously broken global symmetries emerging in many extensions of the Standard Model. Assuming the most general effective Lagrangian up to dimension-5…

High Energy Physics - Phenomenology · Physics 2020-12-08 Gholamhossein Haghighat , Daruosh Haji Raissi , Mojtaba Mohammadi Najafabadi
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