报告题目: |
第三十五期“工物学术论坛”--反物质工程：四十年一台阶 |
报告人: |
许长补 (for the STAR Collaboration) |
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美国布鲁克海文国家实验室（BNL）研究员
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报告时间: |
2011-04-13 10:00 |
报告地点: |
新工物馆刘卿楼105房间 |
主办单位: |
工程物理系 |
简介: |
Roughly every four decades, accelerator and detector advances enable us to leap forward in discoveries of antimatter. While nuclei are abundant in the universe, antimatter nuclei that are heavier than the antiproton have been observed only as products of interactions at particle accelerators.Nuclear collisions recreate conditions similar to that of the universe microseconds after the Big Bang. The subsequent rapid expansion of Quark-Gluon Plasma in nuclear collisions is significantly different from the case of the Big Bang. This decouples matter and antimatter before annihilation, and provides an ideal laboratory for producing and studying heavy antimatter. We present the discovery of the heaviest known antimatter and the first antihypernucleus – the antihypertriton, which is comprised of an antiproton, an antineutron and their heavier strange partner (antilambda). The production and discovery of even heavier antimatter with the existing facilities and their implications will also be discussed. |
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