Low-energy flavour probes of light vector bosons

Di Luzio, L. and Levati, G. and Paradisi, P. and Ponce Dìaz, X. (2024) Low-energy flavour probes of light vector bosons. Il nuovo cimento C, 47 (1). pp. 1-8. ISSN 1826-9885

ncc12785.pdf - Published Version

Download (179kB) | Preview
Official URL: https://www.sif.it/riviste/sif/ncc/econtents/2024/...


In this work, we construct the chiral Lagrangian for a light spin-1 boson X possessing both vectorial and axial couplings to the light Standard Model quarks u, d, s. We then use it in order to describe the tree-level, model-independent contributions to the ΔS = 1 transition K± → π±X, which is induced by Standard Model charged currents and is possibly enhanced by the emission of a longitudinally polarized X boson. Such a flavour observable is then shown to set the best modelindependent bounds on the diagonal axial couplings of X to light quarks in the mass range allowed by the decay kinematics, improving the currently available constraints from beam-dump experiments and collider searches.

Item Type: Article
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 11 Dec 2023 02:59
Last Modified: 11 Dec 2023 02:59
URI: http://eprints.bice.rm.cnr.it/id/eprint/22554

Actions (login required)

View Item View Item