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科技导报
| 专稿 2022, 40(6): 6-11
缪子反常磁矩的精确测量预示存在新物理
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李亮
作者信息
Precise measurement of muon anomalous magnetic moment
LI Liang
Affiliations
出版时间: 2022-03-28
doi: 10.3981/j.issn.1000-7857.2022.06.001
文章导航
缪子反常磁矩a μ =(g μ -2)/2是缪子的基本物理参数之一,它的精确测量和理论计算为标准模型的诞生奠定了基础。费米缪子反常磁矩实验的首个实验结果表明缪子反常磁矩的测量值和标准模型理论预言不相符。该结果与早期布鲁克海文实验的结果相一致。这2个实验的综合测量结果与标准模型预言值的差距为4.2σ,这为新物理的存在提供了强有力的证据,预示着世界上可能存在新的未知粒子或者作用力。
The muon anomalous magnetic moment a μ =(g μ -2)/2 is a fundamental property of the muon particle, which plays a foundation role in the formation of the Standard Model. The first results of the Fermilab Muon g -2 experiment show that the experimental measurement of a μ deviates with the theoretical prediction by 3.3 standard deviation, as in agreement with the previous measurements from the BNL experiment. The combined result of the two experiments is 4.2 standard deviation away from the Standard Model prediction, which provides a strong evidence for new physics, indicating the existence of possible unknown particles or new forces.
muon
/
anomaly magnetic moment
/
Beyond Standard Model
/
new phwsics
李亮.
缪子反常磁矩的精确测量预示存在新物理.
科技导报,
2022
, 40
(6)
: 6
-11
.
DOI: 10.3981/j.issn.1000-7857.2022.06.001
LI Liang.
Precise measurement of muon anomalous magnetic moment[J].
Science & Technology Review ,
2022
, 40
(6)
: 6
-11
.
DOI: 10.3981/j.issn.1000-7857.2022.06.001
2022年第40卷第6期
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文章信息
doi: 10.3981/j.issn.1000-7857.2022.06.001
接收时间:2021-06-02
首发时间:2022-04-27
出版时间:2022-03-28
收稿日期:2021-06-02
修回日期:2021-08-06
https://castjournals.cast.org.cn/joweb/kjdb/CN/10.3981/j.issn.1000-7857.2022.06.001
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2种不同金属材料的力学参数
科 Family 属数 Number of genus 种数 Number of species 占总种数比例 Percentage of total species (%) 属 Genus 种数 Number of species 占总种数比例 Percentage of total species (%) 鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78 小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39 多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39 红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87 小菇属 Mycena 11 5.26 光柄菇属 Pluteus 5 2.39 红菇属 Russula 17 8.13 栓菌属 Trametes 5 2.39
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