# The 39th International Symposium on Lattice Field Theory (Lattice 2022)

Aug 8 – 13, 2022
Hörsaalzentrum Poppelsdorf
Europe/Berlin timezone

## Dark Isosinglet Mesons in $Sp(4)$ gauge theory

Aug 8, 2022, 6:10 PM
20m
CP1-HSZ/Ground-0.001 - HS3 (CP1-HSZ)

### CP1-HSZ/Ground-0.001 - HS3

#### CP1-HSZ

50
Oral Presentation Particle physics beyond the Standard Model

### Speaker

Fabian Zierler (University of Graz)

### Description

In the context of Strongly Interacting Dark Matter theories dark isosinglet mesons might play an important role in the low-energy dynamics and might provide crucial signatures in collider and direct detection searches. We present first results in $Sp(4)$ gauge theory with $N_f=2$ fundamental Dirac flavours on the dark isosinglet pseudoscalar $\eta'$ and the isosinglet contribution to the dark $\pi^0$ meson in the case of strong isospin breaking. A preliminary investigation of the pion scattering lengths shows that the parameter space studied so far appears to be phenomenologically viable. Additionally, these results can be relevant to other BSM models such as composite Higgs scenarios.

### Primary authors

Fabian Zierler (University of Graz) Jong-Wan Lee (Pusan National University) Axel Maas (University of Graz) Felix Pressler (University of Graz)