| 21. | Due to the top quark's shortlifetime, the theta meson is not expected to be observed in nature.
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| 22. | Early searches for the top quark at SLAC and DESY ( in Hamburg ) came up empty-handed.
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| 23. | One of the main difficulties in identifying the top quark is that it cannot be seen directly.
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| 24. | :The top quark does not form baryons, according to our article, because its lifetime is too short.
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| 25. | The top quark is too heavy to form a similar meson, due to its very fast decay.
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| 26. | I don't think I had ever even heard of quarks, let alone missed the very top quark.
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| 27. | "' Ann Heinson "'is an American particle physicist known for her work on single top quark physics.
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| 28. | One could also conclude from this that the unknown sixth quark-the top quark-had to possess a huge mass.
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| 29. | The properties of the top quark, discovered at Fermilab in 1995, have so far only been measured approximately.
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| 30. | Dr . August's is top quark.
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