Journal Article

PUBDB-2024-05521

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png ALPs, the on-shell way

Bertuzzo, E. ; Grojean, C.DESY* ; Salla, G. M. (Corresponding author)

2024
SISSA [Trieste]

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Please use a persistent id in citations: doi:10.1007/JHEP05(2024)175  doi:10.3204/PUBDB-2024-05521

Report No.: CERN-TH-2023-202; DESY-23-090; HU-EP-23/21; arXiv:2311.16253

Abstract: We study how the coupling between axion-like particles (ALPs) and matter can be obtained at the level of on-shell scattering amplitudes. We identify three conditions that allow us to compute amplitudes that correspond to shift-symmetric Lagrangians, at the level of operators with dimension 5 or higher, and we discuss how they relate and extend the Adler's zero condition. These conditions are necessary to reduce the number of coefficients consistent with the little-group scaling to the one expected from the Lagrangian approach. We also show how our formalism easily explains that the dimension-5 interaction involving one ALP and two massless spin-1 bosons receive corrections from higher order operators only when the ALP has a non-vanishing mass. As a direct application of our results, we perform a phenomenological study of the inelastic scattering $\ell^+\ell^- \to \phi h$ (with $\ell^\pm$ two charged leptons, $\phi$ the ALP and $h$ the Higgs boson) for which, as a result of the structure of the 3-point and 4-point amplitudes, dimension-7 operators can dominate over the dimension-5 ones well before the energy reaches the cutoff of the theory.

Keyword(s): dimension: 5 ; operator: higher-order ; scattering amplitude: on-shell ; lepton ; axion: mass ; axion-like particles ; inelastic scattering ; scaling ; Higgs particle ; structure ; Axions and ALPs ; New Light Particles ; Specific BSM Phenomenology

Note: 32 pages + appendices; v2: minor modifications, matches version published in JHEP

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. DFG project G:(GEPRIS)390833306 - EXC 2121: Quantum Universe (390833306) (390833306)
3. ASYMMETRY - Essential Asymmetries of Nature (101086085) (101086085)
4. HIDDeN - Hunting Invisibles: Dark sectors, Dark matter and Neutrinos (860881) (860881)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2024

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Database coverage:
; ; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; National-Konsortium ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Bertuzzo, E. ; Grojean, C.DESY* ; Salla, G. M. (Corresponding author)
ALPs, the on-shell way
[10.3204/PUBDB-2023-03958]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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