Open charm and bottom meson-nucleon potentials à la nuclear force

Abstract

We discuss the interaction of an open heavy meson ($\bar{D}$ and ${\bar{D}}^{\ast }$ for charm or $B$ and $B^{\ast }$ for bottom) and a nucleon ($N$) by considering the $\pi$, $\sigma$, $\rho$, and $\omega$ exchange potentials. We construct a potential model by respecting chiral symmetry for light quarks and spin symmetry for heavy quarks. Model parameters are adjusted by referring the phenomenological nuclear (CD-Bonn) potentials reproducing the low-energy $NN$ scatterings. We show that the resulting interaction may accommodate $\bar{D}N$ and $BN$ bound states with quantum number $I(J^P)=0(1/2^{-})$, and a $BN$ bound state with $I(J^P)=1(1/2^{-})$. We find that, in the present potential model, the $\sigma$ exchange potential plays an important role.

16 pages, 3 figures, 5 tables, published version

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Cited by in corpus (3)

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• Insights into the exotic charged states $Z_b(10610)$ and $Z_b(10650)$ from their photoproduction off nuclei
• Possible ${\bar{D}}^{(\ast )}{\Xi }_{cc}^{(\ast )}$ and ${\Xi }_{cc}^{(\ast )}{\Xi }_{cc}^{(\ast )}$ molecules as superflavor partners of $T_{cc}$