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发表于 2012-1-5 01:20:16
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暗物质存在到目前位置并没有直接证据。所有的观测都是间接的推算。核心问题是，我们并不知道暗物质到底是什么。
下面是wiki中的一段。大家能够大致看到，现在搞宇宙学的人都在想探测到底什么是暗物质。这也包括到底有没有暗物质。
On 17 December 2009 CDMS researchers reported two possible WIMP candidate events. They estimate that the probability that these events are due to a known background (neutrons or misidentified beta or gamma events) is 23%, and conclude "this analysis cannot be interpreted as significant evidence for WIMP interactions, but we cannot reject either event as signal."[78]
More recently, on 4 September 2011, researchers using the CRESST detectors presented evidence[79] of 67 collisions occurring in detector crystals from sub-atomic particles, calculating there is a less than 1 in 10,000 chance that all were caused by known sources of interference or contamination. It is quite possible then that many of these collisions were caused by WIMPs, and/or other unknown particles. |
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