arXiv · hep-ph/9709405
We derive rigorous lower bounds for the combinations of light quark masses (m_s+m_u) and (m_d+m_u).
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Laurent Lellouch. 1997-10-24. How Small Can the Light Quark Masses Be?. https://doi.org/10.1016/s0920-5632(97)00743-3
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