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        "event_title":"HET Seminar |  Fundamental Physics from Large-Scale Structure Cosmology",
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        "combined_title":"HET Seminar |  Fundamental Physics from Large-Scale Structure Cosmology: Mikhail Ivanov (MIT)",
        "event_subtitle":"Mikhail Ivanov (MIT)",
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        "description":"I will present a program for extracting cosmological information by combining effective field theory techniques with data from galaxy surveys. I will highlight previous successes of this program and share new results from my independent re-analyses of the public DESI survey data, which incorporate additional information from higher-order statistics. These results include new measurements of fundamental cosmological parameters and tight constraints on neutrino masses, cosmic inflation, dark matter, and the dark energy equation of state. I will argue that the dark energy results may hint at new a fundamental force between dark matter and dark energy, which can be tested with upcoming large-scale structure data.",
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        "event_title":"HET Seminar |  On the origin of Flavor and CP Violation",
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        "combined_title":"HET Seminar |  On the origin of Flavor and CP Violation: Claudio Manzari (IAS)",
        "event_subtitle":"Claudio Manzari (IAS)",
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        "description":"I will present recent work on several aspects of flavor physics, motivated by suggestive patterns in high-precision data. First, I will discuss CKM unitarity constraints, focusing on the angles of the unitarity triangle and on intriguing hints of spontaneous CP violation. Then, I will argue that Standard Model running of the Yukawa couplings points to quark\u2013lepton unification at a surprisingly low scale. Simple Pati\u2013Salam theories of flavor can realize this for all three generations, with predictions within reach of upcoming searches for charged-lepton flavor violation.",
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        "event_title":"HET Seminar | Euclidean Wormholes and Axion Cosmology",
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        "combined_title":"HET Seminar | Euclidean Wormholes and Axion Cosmology: Gary Shiu (Wisconsin)",
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        "description":"Axions arise ubiquitously in theories of particle physics and quantum gravity and may play important roles in cosmology, from inflation and dark matter to dark energy. This raises a basic question: does quantum gravity constrain the allowed parameter space of axions, and can such constraints have observable consequences? I will discuss how Euclidean wormholes provide a surprising connection between these questions and quantum gravity. I will first review the axionic Weak Gravity Conjecture (aWGC), including the importance of its order-one coefficient for axion phenomenology, and then describe how Euclidean wormholes may give rise to this bound. I will discuss the perturbative stability of axion wormholes and their explicit realization in string theory, both in flat space and in AdS. Finally, I will present recent work showing that the aWGC can arise directly from the nonperturbative fragmentation of Euclidean wormholes into charged defects. Requiring such fragmentation to lower the Euclidean action fixes the action-to-charge bound and its order-one coefficient, and reveals a direct connection to the Imaginary Distance Bound. This suggests that quantum-gravitational constraints on axions can be understood as conditions on the non-perturbative stability of gravitational saddles, with implications for axion cosmology and the consistency of effective field theories.",
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        "event_title":"HET Seminar |",
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        "combined_title":"HET Seminar |: Tanner Trickle (Illinois)",
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        "datetime_start":"20261204T150000",
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        "date_start":"2026-12-04",
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        "time_zone":"America\/Detroit",
        "event_title":"HET Seminar",
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        "combined_title":"HET Seminar: Kiril Hristov (Bulgaria\/IAS)",
        "event_subtitle":"Kiril Hristov (Bulgaria\/IAS)",
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