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By Livsic M. S., Waksman L. L.

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But if their distribution is exactly uniform we should expect them to be completely unobservable. ”11 But what, precisely, would scientists observe? A particle of course, but what kind? ” But, a bit like Schrödinger, Dirac lacked courage. The bubble-particle, he knew, would appear to carry a positive charge, since a gap in a sea of undetected negative charge would be positive by comparison. Dirac, along with every other physicist, knew of only one particle in nature that carried a positive charge—the proton.

Com on Mon Nov 10 19:30:02 2003 22 S T R A N G E M AT T E R S neutron as udd. Particles exhibiting strangeness contain combinations that include an s, or strange, quark. Nowadays physicists recognize six quarks—the up, down, and strange quarks identified by Gell-Mann, and the charm, bottom, and top quarks discovered years later. THE STRAN GE Q U A R K ST RI KE S BA C K For many years after Gell-Mann invented them, nobody worried very much about strange quarks. After all, the oddball particles containing strange quarks didn’t have a very prominent role in real life.

It is possible, their calculations show, that strange stars could have glitches. Still, the best evidence that strange stars exist would be their direct detection, and there are possible signatures of strange stars that could be observed from Earth. For one thing, extremely rapid Copyright © 2003 National Academy of Sciences. All rights reserved. edu) for research purposes are copyrighted by the National Academy of Sciences. Distribution, posting, or copying is strictly prohibited without written permission of the NAP.

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Commuting Nonselfadjoint Operations in Hilbert Space by Livsic M. S., Waksman L. L.

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