That’s the claim in a recent article.
Standard Model: There are four fundamental forces at work in the universe: the strong force, the weak force, the electromagnetic force, and the gravitational force.
Why are the particles mysterious and why do they threaten the Standard Model?:
The particles look like ultra high-energy neutrinos. But ultra high-energy neutrinos shouldn’t be able to pass through the Earth. That suggests that some other kind of particle — one that’s never been seen before — is flinging itself into the cold southern sky.
Now, in a new paper, a team of physicists working on IceCube have cast heavy doubt on one of the last remaining Standard Model explanations for these particles: cosmic accelerators, giant neutrino guns hiding in space that would periodically fire intense neutrino bullets at Earth. A collection of hyperactive neutrino guns somewhere in our northern sky could have blasted enough neutrinos into Earth that we’d detect particles shooting out of the southern tip of our planet. But the IceCube researchers didn’t find any evidence of that collection out there, which suggests new physics must be needed to explain the mysterious particles.Rafi Letzter, “Mysterious particles spewing from Antarctica defy physics” at Space.com
Paper. (open access)
To supplant the Standard Model of the universe would require more than a few anomalies surely. A preferred model must account for the anomalies as well as the known facts.
See also: The Big Bang: Put simply,the facts are wrong. (Well, mainly, inconvenient for certain points of view.)