# EPS-HEP2019

10-17 July 2019
Ghent
Europe/Brussels timezone

## Dark Sector Physics with Belle II

11 Jul 2019, 15:10
20m
Campus Ledeganck - Aud. 2 (Ghent)

### Campus Ledeganck - Aud. 2

#### Ghent

Parallel talk Dark Matter

### Speaker

Sam Cunliffe (DESY)

### Description

The Belle II experiment at the SuperKEKB energy-asymmetric $e^+ e^-$ collider is a substantial upgrade of the B factory facility at the Japanese KEK laboratory. The design luminosity of the machine is $8\times 10^{35}$ cm$^{-2}$s$^{-1}$ and the Belle II experiment aims to record 50 ab$^{-1}$ of data, a factor of 50 more than its predecessor. From February to July 2018, the machine has completed a commissioning run, achieved a peak luminosity of $5.5\times 10^{33}$ cm$^{-2}$s$^{-1}$, and Belle II has recorded a data sample of about 0.5 fb$^{-1}$. Main operation of SuperKEKB has started in March 2019.. Already this early data set with specifically designed triggers offers the possibility to search for a large variety of dark sector particles in the GeV mass range complementary to LHC and dedicated low energy experiments; these searches will benefit from more data in the process of being accumulated. This talk will review the state of the dark sector searches at Belle II with a focus on the discovery potential of the early data.

### Primary authors

Ida Peruzzi (Laboratori Nazionali di Frascati dell'INFN) Sam Cunliffe (DESY)