Listening Practice: One Strange Event in the Dark Matter Hunt
One particle event, deep underground, has made dark matter hunters stop and look twice. The strange part is that it may be important, but it is not yet a discovery.
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One particle event, deep underground, has made dark matter hunters stop and look twice. The strange part is that it may be important, but it is not yet a discovery.
2.6 sigma 为什么还不够,接下来更多数据要怎样检验它。随后用中文梳理主线,并讲解高频词汇和一个容易混淆的统计概念,最后完整重播英文原文。dark matter:暗物质particle interaction:粒子相互作用background:背景信号或背景过程liquid xenon:液态氙underground laboratory:地下实验室WIMP:弱相互作用大质量粒子,一类假设中的暗物质候选粒子signal:信号,可能来自目标现象的观测迹象statistical significance:统计显著性sigma:西格玛,用来表示结果与背景波动相差多远的统计尺度confirm:确认accumulate:积累The event is interesting because it sits where a dark matter signal might appear, but it is not convincing enough to close the case.The event is interesting, but it is not convincing enough,意思是“这个事件很有意思,但还没有足够说服力”。中间的 because 从句解释它为什么有意思;句尾的 to close the case 表示“作出最终确认”。2.6 sigma 是当前结果的统计显著性,距离物理学里常用的五西格玛发现门槛还有明显差距。单个异常事件可以提示新的方向,却不能单独完成一次发现。更多数据如果让信号持续增强,证据会变得更有力;如果信号逐渐消失,背景解释就会更合理。2newscenter.lbl.gov
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