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[新闻] 希格斯玻色子再次获得确认

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发表于 2013-3-16 12:57:23 | 显示全部楼层 |阅读模式
新的数据证实,去年CERN宣布发现的类似希格斯的新粒子确实是希格斯玻色子。去年发现的神秘粒子质量在126 GeV左右,但属性未知。如果它真的是希格斯玻色子,它必须具有理论预言的零自旋和正宇称。上周公布的数据已经确认了这两个属性。

但更重要的是,希格斯玻 色子必须执行它应该执行的任务。为了解释为什么有些基本粒子如W和Z玻色子有质量,而有些基本粒子如光子(也是一种玻色子)没有质量,Peter Higgs提出的希格斯机制认 为,赋予质量的希格斯场遍布于宇宙,有些基础粒子因为与希格斯场之间相互作用而获得质量,但同时也会出现副产品希格斯玻色子。此前已有许多证据显示,希格 斯子会衰减成Z玻色子,但直到现在才有新数据证实它也能衰减成W玻色子,从而补上了空缺。神秘的似希格斯粒子不再神秘。


Scientists more certain that particle is Higgs boson

(CNN) -- Just in time for Albert Einstein's birthday Thursday, scientists delivered exciting news about how the universe works.

Last summer, physicists announced that they had identified a particle with characteristics of the elusive Higgs boson, the so-called "God particle." But, as often the case in science, they needed to do more research to be more certain.

On Thursday, scientists announced that the particle, detected at the Large Hadron Collider, the world's most powerful particle-smasher, looks even more like the Higgs boson.

The news came at the Moriond Conference in La Thuile, Italy, from scientists at the Large Hadron Collider's ATLAS and Compact Muon Solenoid experiments. These two detectors are looking for unusual particles that slip into existence when subatomic particles crash into one another at high energies.


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http://edition.cnn.com/2013/03/14/tech/innovation/higgs-boson-god-particle/index.html

https://plus.google.com/103145909113896656791/posts/EnN78Yuayn5
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