NYU Arts & Science
Physics Colloquia
September 28, 2017 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Rouven Essig
Stony Brook University

Direct Detection of sub-GeV Dark Matter

Dark matter makes up 85% of the matter in our Universe, but we have yet to learn its identity. A broad array of search strategies are needed to probe for non-gravitational interactions between dark matter and ordinary matter. While most searches focus on Weakly Interacting Massive Particles (WIMPs) with masses above 1 GeV/c^2, it is imperative to also consider other motivated dark matter candidates. In this talk, I will discuss dark matter with masses between 1 MeV/c^2 and 1 GeV/c^2, which is a theoretically and phenomenologically appealing possibility and presents a new frontier in the search for dark matter. I will highlight novel dark matter direct-detection strategies that can probe this under-explored mass range. I will describe how XENON10 data taken more than 10 years ago currently sets the best constraint on dark matter with masses as low as a few MeV/c^2. I will then discuss several planned experimental efforts, using xenon, scintillating, and semiconductor targets, that can greatly improve on this constraint. In particular, I will highlight SENSEI, a recently funded experiment that will use new ultra-low-threshold silicon CCD detectors (“Skipper CCDs”), allowing it to probe vast new regions of unexplored dark-matter parameter space in the next few years. I will also present a few simple benchmark models of sub-GeV dark matter, and briefly contrast direct-detection probes with searches at colliders and fixed-target experiments.


October 5, 2017 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Antoine Georges
Collège de France

TBA



October 12, 2017 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Andrew Strominger
Harvard University

TBA



October 19, 2017 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Katepalli Sreenivasan
New York University

TBA



October 26, 2017 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Dmitry Rinberg
New York University

TBA



November 2, 2017 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Raphael Bousso
University of California, Berkeley

TBA



November 9, 2017 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Laura Newburgh
Yale University

New Probes of Old Structure: Cosmology with 21cm Intensity Mapping and the Cosmic Microwave Background

Current cosmological measurements have left us with deep questions about our Universe: What caused the expansion of the Universe at the earliest times? How did structure form? What is Dark Energy and does it evolve with time? New experiments like CHIME, HIRAX, and ACTPol are poised to address these questions through 3-dimensional maps of structure and measurements of the polarized Cosmic Microwave Background. In this talk, I will describe how we will use 21cm intensity measurements from CHIME and HIRAX to place sensitive constraints on Dark Energy between redshifts 0.8 -- 2.5, a poorly probed era corresponding to when Dark Energy began to impact the expansion history of the Universe. I will also discuss how we will use data from new instruments on the ACT telescope to constrain cosmological parameters like the total neutrino mass and probe structure at late times.


December 7, 2017 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Eli Rotenberg
Lawrence Berkeley Lab

TBA



February 1, 2018 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Andre de Gouvea
Northwestern University

TBA



March 22, 2018 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Steven Gubser
Princeton University

TBA



April 19, 2018 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Vicky Kalogera
Northwestern University

TBA



April 26, 2018 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Andrew Geraci
Northwestern University

TBA



May 3, 2018 Thursday 4:00 PM  +
Meyer 122
Physics Colloquia (colloquia)


Priyamvada Natarajan
Yale University

TBA