Beyond The Standard Model
The Standard Model of particle physics is amazingly successful, yet it leaves many basic questions unanswered. From bizarre, unexplained parameters such as the cosmological constant, Higgs mass, or neutron electric dipole moment to the lack of explanation for observed phenomena such as dark matter and baryogenesis, there is strong evidence that the Standard Model must be extended. At SITP we have focused on finding solutions to these open problems to discover what these hints tell us about the underlying laws of physics.
Video Briefs
Dark matter self interactions can leave distinctive signatures on the properties of satellite…
I construct a landscape of vacua of string theory and study the resulting ensemble of N-axion…
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Dr. Racco's research during his SITP postdoctoral appointment has been awarded the Third Prize of the 2023 Buchalter Cosmology Prize.
If the electron’s charge wasn’t perfectly round, it could reveal the existence of hidden particles. A new measurement approaches…
Peter Graham is interested in discovering the fundamental laws of nature that lie beyond the known standard model. He received an A.B./A…
Image credit: L.A. Cicero
Credit: Harrison Truong
The hierarchy problem, the puzzlingly light mass of the Higgs, is one of the largest open questions in physics beyond the Standard Model…
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SITP sign on 3rd floor of the Varian Physics Building
In this talk I explore the physics potential of forward muon detection at muon colliders for probing neutral effective vector boson production across various kinematic regimes. Vectors with relatively low energy produce the Higgs boson…
It is difficult to construct a post-inflation QCD axion model that solves the axion quality problem (and hence the Strong CP problem) without introducing a cosmological disaster. In a post-inflation axion model, the axion field value is…
I will explain how we can search for light Dark Matter by detecting small amounts of phonons in specific crystals. To calculate the scattering rates, we must use methods from computational condensed matter physics within the context of particle…
A self-interacting dark matter (SIDM) halo begins to thermalize once its age is comparable to the (inverse of the) self-interaction rate. Such thermalized self-gravitating systems are know to be unstable due to the so-called "Gravo-Thermal…
We have long celebrated the great success of cosmology in predicting the observed properties of the cosmic microwave background. And yet, for well over two decades there has been consistent and slowly mounting evidence that on large scales…
New millicharged particles—particles with weak electromagnetic interactions, either through an explicit photon coupling or through a kinetically-mixed hidden photon—are a well-motivated dark matter candidate. Previous models of millicharged dark…
The low frequency part of the gravitational wave spectrum generated by local physics, such as a phase transition, is largely fixed by causality, offering a clean window into the early Universe. Due to the difference between sub-horizon and super-…