Past Events

  • Dissertation Defense: "Seeing the Light (Higgs): Searches and Measurements of Higgs Boson Decays to Photons"

    DRL, Room 2C2

    Khilesh Mistry

  • High Energy Theory seminar

    David Rittenhouse Laboratory, 2N36

    James Sully, University of British Columbia

  • Department Colloquium (joint with CBE): "Structuring Matter over Multiple Length Scales using the Self-Assembly of Colloidal Particles"

    David Rittenhouse Laboratory, A8

    Marjolein Dijkstra, Debye Institute for Nanomaterials Science, Utrecht University

    In 1960, Feynman challenged us to think “from the bottom up” and to create new functional materials by directing and manipulating the arrangements of individual atoms ourselves. With recent advances in the synthesis of colloidal nanoparticles and the bottom-up fabrication of nanostructured materials using colloidal self-assembly, we are tantalizingly close to realizing this dream.

  • Joint High Energy Experiment/Theory seminar

    David Rittenhouse Laboratory, 2N36

    Tracy Slatyer, Massachusetts Institute of Technology

  • Experimental Particle Physics Seminar: "Searching for muon to electron conversion: The Mu2e experiment at Fermilab"

    David Rittenhouse Laboratory, A8

    Richie Bonventre, LBNL

    The Mu2e experiment will measure the charged-lepton flavor violating (CLFV) neutrino-less conversion of a negative muon into an electron in the field of a nucleus. Mu2e will improve the previous measurement by four orders of magnitude, reaching a 90% C.L. sensitivity to CLFV conversion rates of 8x10^-17 or larger. The experiment will reach mass scales of nearly 10^4 TeV, far beyond the direct reach of colliders. It will be sensitive to a wide range of new physics, complementing and extending other CLFV searches.

  • Condensed Matter seminar: "Let it rip: In vivo biomechanics studies of Hydra regeneration from tissue spheres"

    David Rittenhouse Laboratory, A4

    Eva-Maria Collins, Swarthmore College

    Hydra, named after the multi-headed monster in Greek mythology, is a radially symmetric freshwater polyp, a few mm in length. Hydra is famous for its regenerative capabilities, allowing it to regenerate from small tissue pieces and even from a "soup of cells" (cell aggregates). Because of its structural simplicity and strong regenerative potential, Hydra is a well-suited system for in vivo biophysical studies of regeneration and pattern formation. 

  • Astronomy seminar: "Numerical Exercises in Galaxy Formation with Modern Cosmological Hydrodynamical Simulations"

    David Rittenhouse Laboratory, A2

    Shy Genel (Flatiron Institute)

    In the first part of the talk, I will discuss how the new generation of cosmological hydrodynamical simulations can revolutionize our understanding of the origin of galaxy morphologies. In particular, I will present a Lagrangian approach to thinking about galactic angular momentum content and on-going work illuminating relations between galaxy and dark matter halo spins. I will then switch gears and present recent work aiming to quantify chaotic aspects of galaxy evolution using controlled numerical experiments with cosmological simulations.

  • Department Colloquium: "Characterizing Exoplanets: From Hot Jupiters to Super-Earths"

    David Rittenhouse Laboratory, A8

    Ray Jayawardhana, Cornell University

    Searches for exoplanets have revealed a remarkable diversity of worlds, and comparative studies of their properties have begun in earnest. Planets that transit are particularly well suited for atmosphere characterization. I will discuss recent results using Kepler data as well as ground-based observations, especially using high-resolution spectroscopy, and attempts to extend those studies to super-Earth planets. I will also preview planned observations using the James Webb Space Telescope.

    Host: Cullen Blake
  • High Energy Theory seminar: "General hot attractors"

    David Rittenhouse Laboratory, 2N36

    Vishnu Jejjala, University of the Witwatersrand

    Non-extremal black holes such as the astrophysical black holes we encounter in the sky remain mysterious objects. As solutions to general relativity, they possess certain invariants. We extend prior investigations of so-called hot attractor black holes to higher dimensions and add a scalar potential. In addition to the event and Cauchy horizons, when we complexify the radial coordinate, non-extremal black holes generically have additional horizons.

  • Experimental Particle Physics Seminar: "Coherent neutrino scattering"

    David Rittenhouse Laboratory, A8

    Kate Scholberg, Duke University