Observation of X(2370) and search for X(2120) in $$J/\psi \rightarrow \gamma K{\bar{K}} \eta '$$

Journal article

We study the fully-strange tetraquark states with the exotic quantum numbers $J^{PC} = 0^{+-}$ and $2^{+-}$. We construct their corresponding diquark-antidiquark interpolating currents, and apply the QCD sum rule method to calculate both their diagonal and off-diagonal correlation functions. The obtained results are used to construct some mixing currents that are nearly non-correlated, from which we extract the masses of the lowest-lying states to be $M_{0^{+-}} = 2.45^{+0.33}_{-0.44}$ GeV and $M_{2^{+-}} = 3.07^{+0.25}_{-0.33}$ GeV. We apply the Fierz rearrangement to transform the diquark-antidiquark currents to be the combinations of meson-meson currents, and the obtained Fierz identities indicate that these two states may be searched for in the $P$-wave $\phi(1020) f_0(1710)/\phi(1020) f_2^\prime(1525) (\to \phi K \bar K / \phi \pi \pi)$ channels.Comment: 14 pages, 5 figures, 1 tables, revised version to be published in PR

Authors: Ablikim, M; Achasov, MN; Adlarson, P; Ahmed, S; Albrecht, M

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: SpringerOpen
• Journal: The European Physical Journal C
• Volume: 80
• Issue: 8
• Pages: 746
• Publication date: 2020-08-01
• DOI: 10.1140/epjc/s10052-020-8078-4
• EISSN: 1434-6052
• ISSN: 1434-6044
• Language: English