Prediction of five-flavored pentaquarks

Abstract

We analyze the possibility of the existence of a fully exotic pentaquark state $udsc\bar{b}$, which is made from the five different flavors participarting in the strong interactions. We investigate the coupled channel effects of the $B^{(\ast )}{\Xi }_c-B^{(\ast )}{\Xi }_c^{\prime }$ system through $t$-channel vector meson exchange to search for such states. A $B{\Xi }_c$ and a $B{\Xi }_c^{\prime }$ bound state are found to have binding energies of about $10-30$~MeV with $B_s{\Lambda }_c$ and $B_c\Lambda$ being the possible decay channels. Similarly, a bound state is formed in the $B^{\ast }{\Xi }_c$ and $B^{\ast }{\Xi }_c^{\prime }$ channels, respectively. These states could be searched for through the $pp\to B_c\Lambda X$ or $pp\to B_s^{(\ast )}{\Lambda }_{c}X$ processes by the LHCb collaboration.

Comments: 5+2 pages, 5 figures