| Full text | |
| Author(s): |
Bertuzzo, Enrico
;
Grojean, Christophe
;
Salla, Gabriel M.
Total Authors: 3
|
| Document type: | Journal article |
| Source: | Journal of High Energy Physics; v. N/A, n. 5, p. 43-pg., 2024-05-15. |
| 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; - -> phi h (with & ell; +/- 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. (AU) | |
| FAPESP's process: | 20/14713-2 - Aspects of the neutrino-dark matter connection |
| Grantee: | Gabriel Massoni Salla |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 19/04837-9 - Particle Physics Phenomenology |
| Grantee: | Gustavo Alberto Burdman |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 22/07360-1 - Nambu-Goldstone bosons interactions from an on-shell perspective |
| Grantee: | Gabriel Massoni Salla |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate |