BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Recent Results on Ultra-High-Energy Cosmic Rays with the Telescope
  Array Experiment
DTSTART:20260617T010000Z
DTEND:20260617T020000Z
DTSTAMP:20260606T071700Z
UID:indico-event-2881@indico.phys.hawaii.edu
DESCRIPTION:Speakers: Hiroyuki Sagawa (Institute for Cosmic Ray Research\,
  University of Tokyo)\n\nUltra-high-energy cosmic rays (UHECRs)\, which po
 ssess extreme energies above 10^18 eV\, are believed to originate from po
 werful astrophysical phenomena in the Universe\, yet their exact sources 
 remain an enduring mystery. The primary objective of the Telescope Array 
 (TA) experiment\, located in the desert of Utah\, USA\, is to elucidate t
 he origin of the highest-energy cosmic rays with energies around and abov
 e 10^20 eV.  As the largest UHECR observatory in the Northern Hemisphere\
 , the TA experiment covers an area of approximately 700 square kilometers
 . The observatory employs a hybrid detection technique that combines a la
 rge surface detector array with fluorescence telescopes to measure extens
 ive air showers.[1] Furthermore\, the inclusion of the Telescope Array Lo
 w-energy Extension (TALE) expands the detector's capability\, allowing the
  experiment to cover a wide energy range starting from above 10^15 eV.Rec
 ent observations have provided measurements of the cosmic-ray energy spec
 trum\, revealing characteristic features such as the ankle and the highes
 t-energy cutoff\, which are crucial for understanding particle accelerati
 on and propagation mechanisms. In addition\, studies of mass composition 
 and arrival-direction anisotropy have provided important insights into po
 ssible source candidates and the effects of cosmic magnetic fields. Notab
 ly\, the detection of an extremely energetic event with an energy of abou
 t 2.4 x 10^20 eV has posed new challenges\, as no obvious astrophysical s
 ource has been identified along its arrivaldirection.[2][3]In this talk\, 
 I will review these recent results\, including the ongoing TAx4 project f
 ocused on the highest energies to expand the aperture fourfold\, and disc
 uss the future prospects.[1] https://urldefense.com/v3/__https://pos.siss
 a.it/501/1410/__\;!!PvDODwlR4mBZyAb0!S_Vht82OOgXZ_2p6P9zDKo0E1S4h6K6XDStpI
 UNvCGMm0tk7FLSkaQWMfhU2YMN3ugp93YtOtFYcUuuac4rQ4uC6nIM$[2] https://urldef
 ense.com/v3/__https://www.omu.ac.jp/info/research_news/entry-08954.html__\
 ;!!PvDODwlR4mBZyAb0!S_Vht82OOgXZ_2p6P9zDKo0E1S4h6K6XDStpIUNvCGMm0tk7FLSkaQ
 WMfhU2YMN3ugp93YtOtFYcUuuac4rQeMWFSWk$[3] https://urldefense.com/v3/__htt
 ps://attheu.utah.edu/facultystaff/cosmic-ray-2023/__\;!!PvDODwlR4mBZyAb0!S
 _Vht82OOgXZ_2p6P9zDKo0E1S4h6K6XDStpIUNvCGMm0tk7FLSkaQWMfhU2YMN3ugp93YtOtFY
 cUuuac4rQElNtk9w$\n\nhttps://indico.phys.hawaii.edu/event/2881/
LOCATION:Room 420 (Watanabe Hall)
URL:https://indico.phys.hawaii.edu/event/2881/
END:VEVENT
END:VCALENDAR