Hilbert series for ALP EFTs

Abstract Axions and axion-like particles (ALPs) are ubiquitous in popular attempts to solve supercalifragilisticexpialidocious puzzles of Nature. A widespread and vivid experimental programme spanning a vast range of mass scales and decades of couplings strives to find evidence for these elusive but...

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Main Authors: Christophe Grojean, Jonathan Kley, Chang-Yuan Yao
Format: Article
Language:English
Published: SpringerOpen 2023-11-01
Series:Journal of High Energy Physics
Subjects:
Online Access:https://doi.org/10.1007/JHEP11(2023)196
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author Christophe Grojean
Jonathan Kley
Chang-Yuan Yao
author_facet Christophe Grojean
Jonathan Kley
Chang-Yuan Yao
author_sort Christophe Grojean
collection DOAJ
description Abstract Axions and axion-like particles (ALPs) are ubiquitous in popular attempts to solve supercalifragilisticexpialidocious puzzles of Nature. A widespread and vivid experimental programme spanning a vast range of mass scales and decades of couplings strives to find evidence for these elusive but theoretically well-motivated particles. In the absence of clear guiding principle, effective field theories (EFTs) prove to be an efficient tool in this experimental quest. Hilbert series technologies are a privileged instrument of the EFT toolbox to enumerate and classify operators. In this work, we compute explicitly the Hilbert series capturing the interactions of a generic ALP to the Standard Model particles above and below the electroweak symmetry scale, which allow us to build bases of operators up to dimension 8. In particular, we revealed a remarkable structure of the Hilbert series that isolates the shift-symmetry breaking and preserving interactions. In addition, with the Hilbert series method, we enumerate the sources of CP violation in terms of CP-even, CP-odd and CP-violating operators. Furthermore, we provide an supplementary file of the Hilbert series up to dimension 15 to supplement our findings, which can be used for further analysis and exploration.
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spelling doaj.art-7d2f1cfae4754e4d9b5b997371d6240a2024-04-21T11:04:54ZengSpringerOpenJournal of High Energy Physics1029-84792023-11-0120231116410.1007/JHEP11(2023)196Hilbert series for ALP EFTsChristophe Grojean0Jonathan Kley1Chang-Yuan Yao2Deutsches Elektronen-Synchrotron DESYDeutsches Elektronen-Synchrotron DESYDeutsches Elektronen-Synchrotron DESYAbstract Axions and axion-like particles (ALPs) are ubiquitous in popular attempts to solve supercalifragilisticexpialidocious puzzles of Nature. A widespread and vivid experimental programme spanning a vast range of mass scales and decades of couplings strives to find evidence for these elusive but theoretically well-motivated particles. In the absence of clear guiding principle, effective field theories (EFTs) prove to be an efficient tool in this experimental quest. Hilbert series technologies are a privileged instrument of the EFT toolbox to enumerate and classify operators. In this work, we compute explicitly the Hilbert series capturing the interactions of a generic ALP to the Standard Model particles above and below the electroweak symmetry scale, which allow us to build bases of operators up to dimension 8. In particular, we revealed a remarkable structure of the Hilbert series that isolates the shift-symmetry breaking and preserving interactions. In addition, with the Hilbert series method, we enumerate the sources of CP violation in terms of CP-even, CP-odd and CP-violating operators. Furthermore, we provide an supplementary file of the Hilbert series up to dimension 15 to supplement our findings, which can be used for further analysis and exploration.https://doi.org/10.1007/JHEP11(2023)196Axions and ALPsSMEFT
spellingShingle Christophe Grojean
Jonathan Kley
Chang-Yuan Yao
Hilbert series for ALP EFTs
Journal of High Energy Physics
Axions and ALPs
SMEFT
title Hilbert series for ALP EFTs
title_full Hilbert series for ALP EFTs
title_fullStr Hilbert series for ALP EFTs
title_full_unstemmed Hilbert series for ALP EFTs
title_short Hilbert series for ALP EFTs
title_sort hilbert series for alp efts
topic Axions and ALPs
SMEFT
url https://doi.org/10.1007/JHEP11(2023)196
work_keys_str_mv AT christophegrojean hilbertseriesforalpefts
AT jonathankley hilbertseriesforalpefts
AT changyuanyao hilbertseriesforalpefts