Göttingen 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
T: Fachverband Teilchenphysik
T 47: Axions/ALPs II
T 47.4: Vortrag
Mittwoch, 2. April 2025, 17:00–17:15, VG 0.110
Search for the K+ → π+ π0 A decay — •Marco Ceoletta — Johannes Gutenberg Universitat, Mainz, Germany
This analysis aims to search for the hypothetical decay K+ → π+ π0 A, where A is Feebly-Interacting Particle (FIP) like an Axion-like particle (ALP) or a Dark Photon, at the NA62 experiment (CERN). Obtaining a stringent upper limit on BR(K+ → π+ π0 A) is important for the verification of BSM theories. In particular the decay is sensitive to an axial-vector coupling of hypothetical pseudo-scalar particles to quarks. A search on K+ → π+ π0 A therefore complements the extensive work already performed on the associated two-body decay K+ → π+ A, that is sensitive only to the polar-vector coupling current. A preliminary upper limit of the branching ratio to ALPs, as part of a feasibility study done in 2022, already outperformed the best previous limit using less than 20% of the available data. The presentation describes the analysis and gives an outlook on the selection and expected upper limits.
Keywords: NA62; ALPs; Kaon