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SSS 2008-04-10

时间:2010-05-13 06:36来源:互联网 提供网友:0922013129   字体: [ ]
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This is Scientific American's 60-Second Science, I'm Steve Mirsky, got a minute?

 Every Star Trek1 fan knows there’s matter and antimatter, but why is there apparently2 so much more matter than antimatter?Scientific American's JR Minkel: "Two recent experiments show something interesting is going on in the Subatomic particle, called Bs Meson. It flips3 between its matter and antimatter forms 3 trillion times a second, but the flipping4 isn't quite matching up with the predictions of the standard model of particle physics. We think that in the very early universe, there were almost equal parts matter and antimatter. And universe back then was acting5 like a giant cauldron spewing particles, lot of energy, lot of particles being made. But a slightly higher chance that the particles would be matter and not antimatter, which the standard model doesn't explain. Now the odd behavior of the  Bs Meson could be giving us some clues about why matter won out over antimatter. When large hadron collider goes online in Europe this year, we may finally be able to observe conditions that would really show us what happened in the early universe to make it the way it is today."

 

See JR's article “Matter,antimatter split hints at physics breakdown6" at sciam.com.

 

Thanks for the minute, for Scientific American's 60-Second Science, I'm Steve Mirsky.

 


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1 trek 9m8wi     
vi.作长途艰辛的旅行;n.长途艰苦的旅行
参考例句:
  • We often go pony-trek in the summer.夏季我们经常骑马旅行。
  • It took us the whole day to trek across the rocky terrain.我们花了一整天的时间艰难地穿过那片遍布岩石的地带。
2 apparently tMmyQ     
adv.显然地;表面上,似乎
参考例句:
  • An apparently blind alley leads suddenly into an open space.山穷水尽,豁然开朗。
  • He was apparently much surprised at the news.他对那个消息显然感到十分惊异。
3 flips 7337c22810735b9942f519ddc7d4e919     
轻弹( flip的第三人称单数 ); 按(开关); 快速翻转; 急挥
参考例句:
  • Larry flips on the TV while he is on vacation in Budapest. 赖瑞在布达佩斯渡假时,打开电视收看节目。
  • He flips through a book before making a decision. 他在决定买下一本书前总要先草草翻阅一下。
4 flipping b69cb8e0c44ab7550c47eaf7c01557e4     
讨厌之极的
参考例句:
  • I hate this flipping hotel! 我讨厌这个该死的旅馆!
  • Don't go flipping your lid. 别发火。
5 acting czRzoc     
n.演戏,行为,假装;adj.代理的,临时的,演出用的
参考例句:
  • Ignore her,she's just acting.别理她,她只是假装的。
  • During the seventies,her acting career was in eclipse.在七十年代,她的表演生涯黯然失色。
6 breakdown cS0yx     
n.垮,衰竭;损坏,故障,倒塌
参考例句:
  • She suffered a nervous breakdown.她患神经衰弱。
  • The plane had a breakdown in the air,but it was fortunately removed by the ace pilot.飞机在空中发生了故障,但幸运的是被王牌驾驶员排除了。
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TAG标签:   SSS  antimatter
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