These objects were not seen directly in visible light.
They are traces, rather than actual bosons, because no Higgs will ever be seen directly.
Nothing is ever seen directly though we can be confident that these techniques yield atomic coordinates accurate enough to specify how the molecules are constructed.
So, yes, we are concerned about it and we are closely monitoring it, but we have not seen anything but what we have seen directly.
While those particles are not predicted by the Standard Model and have never been seen directly in an experiment, their existence would not surprise theorists.
… What is it that fills me with extraordinary excitement?," the answer might be that it's Clarissa's radiance, never seen directly, but burning through.
Other physicists, including Dr. McKenzie, said that because the reconnection had not been seen directly, the case was far from settled.
As critical as it is to the picture, the Higgs boson remains the sole particle predicted by the theory that has not yet been seen directly.
In general, this dust cannot be seen directly but can be detected from the infrared radiation it emits after being heated by nebular and stellar radiation.
Neither does letting them sit at the feet of academic parents while the grown-ups converse about Plato.The effects can be seen directly in the brain.
The mountain can be seen directly from its northeastern side, where it rises about 12,000 feet (3,600 metres) above the Plateau of Tibet.
