Joint Seminar of the Laboratory of Information Technologies

Date and Time: Friday, 27 July 2018, at 11:00 AM

Venue: room 310, Laboratory of Information Technologies

Seminar topic: «The diversities of cosmic ray phenomena at high and extremenly high energy estimation of the phenomena concerned»

Speaker: Prof. Akeo Misaki (Saitama University, Japan)

Abstract:

The speaker’s talk deals with cosmic ray phenomena at high (over 10¹⁰ – 10¹² eV to 10¹² – 10¹⁵ eV) and extremely high (over 10²¹ eV), such as high and extremely high energy neutrino physics phenomena, and extensive air showers. Concretely speaking, the range energy fluctuation of high energy muon which plays an important role in high and extremely high energy muon astrophysics physics over 10¹² eV to 10¹⁵ eV is discussed. The diversity of the electromagnetic cascade showers at extremely high energies (10¹⁵ eV to 10²³ eV) is analyzed for the its application to extremely high energy electron neutrino astrophysics. The energy estimation of extensive air showers is considered, too. The importance of the exact treatment to the stochastic processes in cosmic ray phenomena at high and extremely high energies is strongly emphasized. Such exact treatments to stochastic processes in the cosmic ray phenomena have not been adopted due to time consuming, frequently, which may lead to unreliable conclusion. The speaker would explain the background for the collaboration with Drs. Olga Voskresenskaya and Hrach Torosyan in his seminar.