Event Date and Time
Eun-Suk Seo, University of Maryland
One of the most exciting possibilities in cosmic ray research is the potential to discover new phenomena. Elementary particles were discovered in cosmic rays before modern-day accelerators became available to study their detailed properties. Since the discovery of cosmic ray antiprotons in 1979 using a balloon-borne magnet spectrometer, a series of magnet spectrometers have been flown to search for the signature of dark matter annihilation/decay in antiprotons and positrons. AMS-02 on the International Space Station (ISS) is currently providing measurements of various particles and anti-particles, including positrons and antiprotons, with unprecedented precision. In particular, excess positrons generated a lot of excitement due to their possible explanation of dark matter. In addition, the JAXA-led CALET ISS mission and the DAMPE Chinese Satellite have been in operation since 2015. Most recently, NASA’s ISS-CREAM was launched on SpaceX-12 and successfully installed on the ISS in 2017. These missions provide complementary measurements exploring energies higher than previously possible to constrain cosmic ray propagation models in search of dark matter and the origin of cosmic rays. Recent results, their implications, and the outlook for the field will be presented.