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Distorting Nuclear Mirror
Physics 14, s20
Two “mirror” nuclei, in which the numbers of neutrons and protons are interchanged, have markedly different shapes a finding that defies current nuclear theories.
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The development of nuclear theories was aided by a postulated symmetry of the strong interaction holding nucleons together. This interaction, it was initially thought, should be independent of particle charge, allowing neutrons and protons to be regarded as two states of the same particle. However, this “isospin” symmetry isn’t exact as demonstrated, for instance, by the slight mass difference between protons and neutrons. Researchers have previously accounted for such manifestations of isospin symmetry breaking by tweaking nuclear theories. But now, Kathrin Wimmer, of the Institute for the Structure of Matter in Spain and of the University of Tokyo, and colleagues have shown that two “mirror” nuclei exhibit a degree of symmetry violation that cur ....

United States , Alan Stonebraker , Kathrin Wimmer , Matteo Rini , University Of Tokyo , Institute For The Structure Of Matter , ஒன்றுபட்டது மாநிலங்களில் , ஆலன் ஸ்தோந்ெபிரகேற் , கதிரின் வீம்மேர் , மேட்டியோ ரினி , பல்கலைக்கழகம் ஆஃப் டோக்கியோ , நிறுவனம் க்கு தி அமைப்பு ஆஃப் விஷயம் ,