Are the anticharmed and bottomed pentaquarks molecular heptaquarks?

I study the charmed $uudd\overline{c}$ resonance $D^{*-}p(3100)$ very recently discovered by H1 Collaboration at HERA, using a standard quark model with a quark-antiquark annihilation constrained by chiral symmetry. I find that repulsion excludes the $D^{*-}p(3100)$ as a $uudd\overline{c}$ $s$-wave pentaquark. I explore the $D^{*-}p(3100)$ as a heptaquark, equivalent to a $N-\pi -D^{*}$ borromean linear molecule, with positive parity and total isospin $I=0$. I find that the $N-D$ repulsion is canceled by the attraction existing in the $N-\pi$ and $\pi -D$ channels. Multiquark molecules $N-\pi -D$, $N-\pi -B^{*}$, and $N-\pi -B$ are also predicted.

Figure 1

Examples of RGM overlaps are depicted: in (a) the norm overlap for the meson-baryon interaction, in (b) a kinetic overlap for the meson-meson interaction, in (c) an interaction overlap for the meson-meson interaction, and in (d) the annihilation overlap for the meson-baryon interaction.