Jun 7 – 12, 2021
Europe/Paris timezone

Sp(4) SIMP Dark Matter on the Lattice

Jun 10, 2021, 6:45 PM


Theory poster Dark Sector BSM Poster Session


Fabian Zierler (University of Graz)


The Strongly Interacting Massive Particle (SIMP) paradigm has recently been increasingly studied. It provides dark matter candidates as pseudo-Goldstone bound states of dark fermions under a new gauge group. In this scenario freezeout occurs through $3\to 2$ dark matter self-annihilation and points to DM particles with masses of $\mathcal O(100 ~\text{MeV})$. We study the spectrum of the lightest mesons of $Sp(4)$ gauge theory with 2 massive almost-degenerate fundamental Dirac fermions using lattice gauge theory. This setup leads to a total of 5 pseudo-Goldstone bosons which can self-annihilate. In particular, we investigate the breaking of the flavour symmetry when making the fermions non-degenerate. We report that one pseudo-Goldstone is lighter than the others while the remaining heavier four pseudo-Goldstones are still mass-degenerate.

Primary authors

Fabian Zierler (University of Graz) Axel Torsten Maas (University of Graz)

Presentation materials