Speaker
Dr
Koji YOSHIMURA
(High Energy Accelerator Research Organization (KEK))
Description
The primary aims of the BESS-Polar program are precise measurements of the low-energy antiproton spectrum and search for cosmologically significant antimatter, which would provide new clues to understand the early Universe. The second flight (BESS-Polar II) over Antarctica was successfully carried out in December 2007 - January 2008. We performed 24.5 days scientific observation just at the solar minimum. The payload worked well during the flight and 4.7 billion cosmic-ray events were collected, which corresponds to 10-20 times statistics of the BESS data taken in the previous solar minimum period (1995 and 1997). Based on the BESS-Polar II data, we will present recent preliminary results of cosmic-ray antiproton measurements and sensitive search for antimatter.
Primary author
Dr
Koji YOSHIMURA
(High Energy Accelerator Research Organization (KEK))
Co-authors
Mr
A. Itazaki
(Kobe University)
Prof.
Akira Yamamoto
(High Energy Accelerator Research Organization (KEK))
Dr
Alex Moiseev
(National Aeronautics and Space Administration, Goddard Space Flight Center (NASA/GSFC))
Dr
Atsushi Horikoshi
(High Energy Accelerator Research Organization (KEK))
Prof.
Eun-Suk Seo
(University of Maryland)
Dr
Hideyuki Fuke
(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA))
Dr
John Mitchell
(National Aeronautics and Space Administration, Goddard Space Flight Center (NASA/GSFC))
Prof.
Jonathan Ormes
(University of Denver)
Prof.
Jun Nishimura
(The University of Tokyo)
Mr
Junichi Suzuki
(High Energy Accelerator Research Organization (KEK))
Mr
K. Matsumoto
(High Energy Accelerator Research Organization (KEK))
K. Takeuchi
(High Energy Accelerator Research Organization (KEK))
Mr
Kenichi Sakai
(The University of Tokyo)
Mr
Kenichi Tanaka
(High Energy Accelerator Research Organization (KEK))
Dr
Ki-Chun Kim
(University of Maryland)
Dr
Ko Abe
(Kobe University)
Dr
Makoto Sasaki
(National Aeronautics and Space Administration, Goddard Space Flight Center (NASA/GSFC))
Dr
Masaya Hasegawa
(High Energy Accelerator Research Organization (KEK))
Prof.
Mitsuaki Nozaki
(High Energy Accelerator Research Organization (KEK))
Dr
MooHyun Lee
(University of Maryland)
Neeharika Thakur
(University of Denver)
Dr
Reiko Orito
(High Energy Accelerator Research Organization (KEK))
Dr
Robert Streitmatter
(National Aeronautics and Space Administration, Goddard Space Flight Center (NASA/GSFC))
Ms
Ryohko Shinoda
(High Energy Accelerator Research Organization (KEK))
Dr
Sadakazu Haino
(High Energy Accelerator Research Organization (KEK))
Dr
Shinya Matsuda
(High Energy Accelerator Research Organization (KEK))
Mr
T. Kumazawa
(High Energy Accelerator Research Organization (KEK))
Prof.
Takamasa Yamagami
(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA))
Prof.
Tetsuya Yoshida
(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA))
Dr
Thomas Hams
(National Aeronautics and Space Administration, Goddard Space Flight Center (NASA/GSFC))
Mr
Y. Takasugi
(Kobe University)
Dr
Yasuhiro Makida
(High Energy Accelerator Research Organization (KEK))
Dr
Yoshiaki Shikaze
(Kobe University)
Mr
Yosuke Matsukawa
(Kobe University)
Mr
Z. Myers
(National Aeronautics and Space Administration, Goddard Space Flight Center (NASA/GSFC))
