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Abstract
After half a century of studies mostly driven by data, High Energy Physics has reached a complex juncture: on the one hand we have a list of open questions not addressed by the Standard Model of elementary particle physics, on the other hand we lack clear indications of a theory that accurately describes Nature or a clear path to reveal irrefutable evidence thereof. In this talk, I will demonstrate that astrophysical and cosmological observations have achieved such precision, thanks to recent advancements, that they have started to shed light on fundamental physics in various new ways. Preference to any beyond-the-standard-model theories from the astrophysical observables will in turn motivate other frontiers (e.g. collider programs and neutrino experiments) for the coming decades. The argument will be supported with a few concrete examples to probe theories above the electroweak scale. I will discuss the novel use of observables from galaxy kinematics, cosmological distance measurements, gravitational waves, radio astronomy, and solar X-ray emission, to reveal imprints of New Physics. I will conclude by presenting a strategic plan for future searches.
Biography
Dr. Chen Sun is a Postdoctoral Research Associate at the Theoretical Division of Los Alamos National Laboratory (LANL). He earned his doctorate from Virginia Tech in 2017 under the supervision of Prof. Tatsu Takeuchi. He then worked as a Postdoctoral Fellow at Dartmouth College/Brown University (2017-2019) and Tel Aviv University (2019-2022) before joining LANL in 2022.
Dr. Sun works at the interface of elementary particle physics and astrophysics. In particular, he has studied axion physics, dark matter, dark photon, neutrino physics, magnetic monopoles, and inflation using various astrophysical observables. The latter includes galaxy kinematics, radio astronomy, gravitational waves, supernovae, and cosmic distance measurements among others.
Since joining LANL, he has focused on bringing up the synergy of New Physics search using low-energy laboratory measurements and that using astrophysics, with his notable contribution to identifying the Axion-Magnetic Resonance, a mechanism that greatly enhances the sensitivity of axion searches.
Outside work, Dr. Sun enjoys reading introductory psychology as a hobby, listening to podcasts, tinkering with Emacs and Linux home lab, and blogging physics.
Video link (internal only):
https://vshare.sjtu.edu.cn/play/45e25519-7a11-4f81-9168-c89a00bef9a0
Slides:
(cosmicdiscord.net)https://cloud.cosmicdiscord.net/s/AjqRYHjZbxpz8b8