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.

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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.

Peter Graham

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

The history of particle accelerators is one of seemingly constant one-upmanship. Ever since the 1920s, the machines – which spur charged…

Credit: Harrison Truong

A team of Stanford University researchers are on a mission to identify dark matter once and for all. But first, they'll need to build the…

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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Abstract: Quantum information science seeks to exploit the collective behavior of a large quantum system to enable tasks that are impossible (or less possible!) with classical resources alone. This burgeoning field encompasses a variety…

The Cosmic Neutrino Background (CNB) is a relic of the pre-CMB era which encodes a trove of information about the early Universe and the neutrino sector dating back to when the Universe was less than a second old. In this talk, I will argue that…

Ben Garber head shot

Abstract: Matter-wave interferometry using ultracold atoms in free-fall is a versatile experimental technique for precision measurement of fundamental physical constants and laws. The Hogan Lab is developing the subdiscipline of large…

There are a variety of experimental and astrophysical constraints on non-gravitational interactions of dark matter, both with itself and with the Standard Model. Most of these constraints assume that such interactions are short-ranged, however,…

Fast radio bursts (FRBs) are short and very bright transients visible over extragalactic distances. Their origin is still a mystery, but since the radio pulse undergoes dispersion caused by free electrons along the line of sight, FRBs can be used…

Abstract: One of the strongest predictions of the standard cold dark matter paradigm is the hierarchy of structure down to Earth-mass scales. However, individual self-bound clumps of dark matter--"halos"--are difficult to detect directly.…