Author: sylvia

• research-publ

  Substructure at High Speed. I. Inferring the Escape Velocity in the Presence of Kinematic Substructure

  The local escape velocity provides valuable inputs to the mass profile of the galaxy, and requires understanding the tail of the stellar speed distribution. Following Leonard & Tremaine, various works […]

• research-publ

  Long-lived Axion-Like Particles from Tau Decays

  Axion-like particles (ALPs) are well-motivated examples of light, weakly coupled particles in theories beyond the Standard Model. In this work, we study long-lived ALPs coupled exclusively to leptons in the […]

• research-publ

  Observation of the axion quasiparticle in 2D MnBi₂Te₄

  The axion is a hypothetical fundamental particle that is conjectured to correspond to the coherent oscillation of the θ field in quantum chromodynamics. Its existence would solve multiple fundamental questions, […]

• research-publ

  Observing Leptogenesis in Action with Gravitational Waves

  Leptogenesis is arguably the best motivated theory of baryogenesis given the discovery of finite neutrino masses, yet its experimental test is elusive given its high energy scale. We discuss gravitational […]

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  The Secret Life of Neutrinos

  Neutrinos are cosmic tricksters, paradoxically hardly there but lethal to stars significantly more massive than the sun.