Open-flavor charmed/bottom $sq\bar q\bar Q$ and $qq\bar q\bar Q$ tetraquark states

摘要

We provide comprehensive investigations for the mass spectrum of exoticopen-flavor charmed/bottom $sq\bar q\bar c$, $qq\bar q\bar c$, $sq\bar q\barb$, $qq\bar q\bar b$ tetraquark states with various spin-parity assignments$J^P=0^+, 1^+, 2^+$ and $0^-, 1^-$ in the framework of QCD sum rules. In thediquark configuration, we construct the diquark-antidiquark interpolatingtetraquark currents using the color-antisymmetric scalar and axial-vectordiquark fields. The stable mass sum rules are established in reasonableparameter working ranges, which are used to give reliable mass predictions forthese tetraquark states. We obtain the mass spectra for the open-flavorcharmed/bottom $sq\bar q\bar c$, $qq\bar q\bar c$, $sq\bar q\bar b$, $qq\barq\bar b$ tetraquark states with various spin-parity quantum numbers. Inaddition, we suggest searching for exotic doubly-charged tetraquarks, such as$[sd][\bar u\bar c]\to D_s^{(\ast)-}\pi^-$ in future experiments at facilitiessuch as BESIII, BelleII, PANDA, LHCb and CMS, etc.