Prediction of charmed-bottom pentaquarks in quark model

Abstract Inspired by the fully heavy tetraquark states reported LHCb, ATLAS and CMS Collaborations, we perform a systematical investigation of low-lying pentaquark systems composed charm bottom quarks (anti-quark) in chiral quark model. With help channel-coupling, obtain several candidates, which are $$cccc\bar{b}$$ c b ¯ $$bbbb\bar{c}$$ with $$J^P = 1/2^-$$ J P = 1 / 2 - $$3/2^-$$ 3 , $$cccb\bar{c}$$ $$bbbc\bar{b}$$ $$cccb\bar{b}$$ $$bbbc\bar{c}$$ 5/2^-$$ 5 . The binding energies these all below 10 MeV root mean square (RMS) around 1.8 fm, indicates that likely to be molecular states. These predicted exotic may provide new ideas for experimental searches expect more theoretical researches study understand future.