A gauged U(1)_B extension of the Standard Model is claimed to produce observable gravitational waves from a first-order phase transition, with dark matter around 8-12 TeV.
Gauge Baryon Number and Dibaryonic Dark Matter
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abstract
The minimal standard model of quarks and leptons is extended with a set of vectorlike fermions to allow baryon number $B$ to become a gauged $U(1)_B$ symmetry. The $B$ assignments of the new particles are determined by renormalizable interactions with the known quarks through a color triplet scalar diquark. The spontaneous breaking of $U(1)_B$ by a scalar with $B=3$ results in a conserved residual global $B$ symmetry. A singlet neutral scalar with $B=2$ is a possible long-lived dark-matter candidate.
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Probing Leptophobic Dark Sectors via Gravitational Wave Signatures
A gauged U(1)_B extension of the Standard Model is claimed to produce observable gravitational waves from a first-order phase transition, with dark matter around 8-12 TeV.