The observations of Ultra High Energy Cosmic Rays (UHECR) are renewed, focusing on the energy spectra as measured by HiRes, Telescope Array (TA) and Auger detectors (PAO). It is found that highest energy Auger s...The observations of Ultra High Energy Cosmic Rays (UHECR) are renewed, focusing on the energy spectra as measured by HiRes, Telescope Array (TA) and Auger detectors (PAO). It is found that highest energy Auger steepening does not agree with GZK cutoff, which is most probably explained by the nuclei mass composition detected by Auger. At present the difference in mass composition in Auger and HiRes/TA data remains the main unsolved problem of UHECR origin.展开更多
第18届超相对论性核-核碰撞国际会议(夸克物质2005),18th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions(Quark Matter 2005),于2005年8月4~9日在匈牙利的首都布达佩斯举行。参加本届会议的代表来...第18届超相对论性核-核碰撞国际会议(夸克物质2005),18th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions(Quark Matter 2005),于2005年8月4~9日在匈牙利的首都布达佩斯举行。参加本届会议的代表来自50多个国家的研究单位和大学,共有600多位从事粒子物理、核物理、天体物理、加速器物理、电子学技术、信息技术等方面的实验和理论研究的科学家或技术人员。华中师范大学粒子物理研究所蔡勖教授,受聘为该国际会议的国际顾问委员会的成员,应邀出席了会议。展开更多
文摘The observations of Ultra High Energy Cosmic Rays (UHECR) are renewed, focusing on the energy spectra as measured by HiRes, Telescope Array (TA) and Auger detectors (PAO). It is found that highest energy Auger steepening does not agree with GZK cutoff, which is most probably explained by the nuclei mass composition detected by Auger. At present the difference in mass composition in Auger and HiRes/TA data remains the main unsolved problem of UHECR origin.
文摘第18届超相对论性核-核碰撞国际会议(夸克物质2005),18th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions(Quark Matter 2005),于2005年8月4~9日在匈牙利的首都布达佩斯举行。参加本届会议的代表来自50多个国家的研究单位和大学,共有600多位从事粒子物理、核物理、天体物理、加速器物理、电子学技术、信息技术等方面的实验和理论研究的科学家或技术人员。华中师范大学粒子物理研究所蔡勖教授,受聘为该国际会议的国际顾问委员会的成员,应邀出席了会议。