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A new study suggests that many theorized heavy particles, if they exist at all, do not have the properties needed to explain the predominance of matter over antimatter in the universe.
If confirmed, the findings would force significant revisions to several prominent theories posed as alternatives to the Standard Model of particle physics, which was developed in the early 1970s. Researchers from Yale, Harvard, and Northwestern University conducted the study, which was published Oct. 17 in the journal Nature.
The discovery is a window into the mind-bending nature of particles, energy, and forces at infinitesimal scales, specifically in the quantum realm, where even a perfect vacuum is not truly empty. Whether that emptiness is located between stars or between molecules, numerous experiments have shown that any vacuum is filled with every type of subatomic particle — and their antimatter counterparts — constantly popping in and out of existence.
Source: https://news.yale.edu/2018/10/17/new-study-sets-size-limit-undiscovered-subatomic-particles
(Score: 0) by Anonymous Coward on Monday October 29 2018, @02:16PM
Not likely. If antimatter was anti-gravitic, it would also be anti-inertial, if you believe in Einstein's Equivalence Principle, and then the conservation of momentum would not hold (or would make for a weird behavior), and that would be apparent in experiments with positrons and antiprotons.