# On the $π$ and $K$ as $q ar q$ Bound States and Approximate Nambu-Goldstone Bosons - High Energy Physics - Phenomenology

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Abstract: We reconsider the two different facets of $\pi$ and $K$ mesons as $q \bar q$bound states and approximate Nambu-Goldstone bosons. We address several topics,including masses, mass splittings between $\pi$ and $ho$ and between $K$ and$K^*$, meson wavefunctions, charge radii, and the $K-\pi$ wavefunction overlap.

Autor: Shmuel Nussinov, Robert Shrock

Fuente: https://arxiv.org/