Physicists Shed Light on Possible “Fifth Force of Nature”
In a breakthrough for the field of particle physics, Prof. Larry Hunter and colleagues at Amherst and The Univ. of Texas at Austin have established new limits on what scientists call “long-range spin-spin interactions” between atomic particles. These interactions have been proposed by theoretical physicists but have not yet been seen. Their observation would constitute the discovery of a “fifth force of nature” (in addition to the four known fundamental forces: gravity, weak, strong and electromagnetic) and would suggest the existence of new particles, beyond those presently described by the Standard Model of particle physics.
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