Aachen 2019 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 34: Axionen I

T 34.7: Vortrag

Dienstag, 26. März 2019, 17:30–17:45, S09

Search for Axion-Like Particles produced in e⁺e⁻ collision at Belle II — •Michael De Nuccio — DESY, Hamburg, Germany

The Belle II experiment, located at the asymmetric e⁺e⁻ collider SuperKEKB in Tsukuba, Japan, is a second-generation B factory experiment. A first commissioning run took place in Spring 2018. The main physics data taking will begin in early 2019. Thanks to the very clean environment and dedicated triggers, Belle II is suited to perform searches for dark-sector particles.

ALPs are light neutral pseudoscalars interacting predominantly with Standard Model photons, and have been proposed as both candidate dark matter particles or as portal particles to the dark sector. The sensitivity for ALPs produced in association with a recoil photon from e⁺e⁻ collisions, and decaying promptly into two photons, is already competitive using the small commissioning collisions dataset collected at Belle II. This talk will discuss the expected sensitivity and the status of the ongoing analysis for this search.