Open-charm tetraquark Xc and open-bottom tetraquark Xb
Journal
European Physical Journal C
Journal Volume
80
Journal Issue
11
Pages
-
Date Issued
2020
Author(s)
Abstract
Motivated by the LHCb observation of exotic states X0 , 1(2900) with four open quark flavors in the D-K+ invariant mass distribution in the decay channel B±→ D+D-K±, we study the spectrum and decay properties of the open charm tetraquarks. Using the two-body chromomagnetic interactions, we find that the two newly observed states can be interpreted as a radial excited tetraquark with JP= 0 + and an orbitally excited tetraquark with JP= 1 -, respectively. We then explore the mass and decays of the other flavor-open tetraquarks made of sud¯ c¯ and dsu¯ c¯ , which are in the 6 ¯ or 15 representation of the flavor SU(3) group. We point that these two states can be found through the decays: Xdsu¯c¯(′)→(D-K-,Ds-π-), and Xsud¯c¯(′)→Ds-π+. We also apply our analysis to open bottom tetraquark Xb and predict their masses. The open-flavored Xb can be discovered through the following decays: Xuds¯b¯→ BK+, Xdsu¯b¯(′)→(B0K-,Bs0π-), and Xsud¯b¯(′)→Bs0π+.
Type
journal article