Dark sector physics at Belle II

Sumitted to PubDB: 2021-10-04

Category: Talk, Visibility: Public

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Authors	Giacomo De Pietro
Date	Sept. 13, 2021
Belle II Number	BELLE2-TALK-CONF-2021-121
Abstract	The Belle II experiment at the asymmetric 𝑒+𝑒− collider, SuperKEKB, is a substantial upgrade of the Belle/KEKB experiment. Belle II aims to record 50 ab−1 of data over the course of the project. During the first physics runs in 2018-2020, around 100 fb−1 of data were collected. These early data include specifically-designed low-multiplicity triggers which allow a variety of searches for light dark matter and dark-sector mediators in the GeV mass range.This talk will present the very first world-leading physics results from Belle II: searches for the invisible decays of a new vector Z’, and visible decays of an axion-like particle; as well as the near-term prospects for other dark-sector searches. Many of these searches are competitive with the data already collected or the data expected in the next few years of operation.
Conference	Dark Matter 2021: From the Smallest to the Largest Scales