First Observation of sub-PeV galactic diffuse gamma rays by the Tibet ASgamma experiment : Dr. Masato TAKITA (ICRR)

ICRR Seminar

NumberR3-1
 Date&Time May 27, 2021, 14:00pm-15:30pm (JST)
 PlaceZoom: https://zoom.us/j/93762776025?pwd=eVZFNUtKWUIzNFNkZ3lLR09mR1Zhdz09
 SpeakerMasato Takita for the Tibet ASgamma collaboration, ICRR, the University of Tokyo 
Title“First observation of sub-PeV galactic diffuse gamma rays by the Tibet ASgamma experiment”
 AbstractThe Tibet ASgamma experiment is located at 4,300m above sea level, in Tibet, China. The experiment is composed of a 65,000 m2 surface air shower array and 3,400 m2 underground water Cherenkov muon detectors. The surface air shower array is used for reconstructing the primary particle energy and direction, while the underground muon detectors are used for discriminating gamma-ray induced muon-poor air showers from cosmic-ray (proton, helium,…) induced muon-rich air showers. Recently, the Tibet ASgamma  experiment succeeded in first observation of sub-PeV diffuse gamma-ray events along the Galactic disk during approximately two-year live days between 2014 and 2017. In this talk, I would like to introduce the experimental result as well as its interpretation, followed by some future prospect.