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Spectral enhancement near the 2m_π threshold in the I0ex0ex=0ex0exJ0ex0ex=0ex0ex0 channel in nuclei is shown to be a distinct signal of the partial restoration of chiral symmetry. The relevance of this phenomenon with the possible detection of 2π⁰ and 2γ in hadron-nucleus and photon-nucleus reactions is discussed.
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Hatsuda et al. (1999) studied this question.
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