The most precise calculations yet of how two quarks locked in a bound state annihilate have been achieved using lattice quantum chromodynamics — and signal a curious discrepancy.
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Shipsey, I. A win–win situation. Nature Phys 4, 438–440 (2008). https://doi.org/10.1038/nphys981
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DOI: https://doi.org/10.1038/nphys981
