%0 Journal Article
%T Strange molecular partners of the Z(c)(3900) and Z(c)(4020)
%A Yang, Z.
%A Cao, X.
%A Guo, F. K.
%A Nieves, J.
%A Pavon Valderrama, M.
%J Physical Review D
%D 2021
%V 103
%N 7
%I Amer Physical Soc
%@ 2470-0010
%G English
%F Yang_etal2021
%O WOS:000648581900002
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4832), last updated on Tue, 01 Jun 2021 07:30:23 +0000
%X Quantum chromodynamics presents a series of exact and approximate symmetries which can be exploited to predict new hadrons from previously known ones. The Z(c)(3900) and Z(c)(4020), which have been theorized to be isovector D*(D) over bar and D*(D) over bar* molecules [I-G(J(PC)) = 1(-)(1)(+-))], are no exception. Here we argue that from SU(3)-flavor symmetry, we should expect the existence of strange partners of the Z(c)'s with hadronic molecular configurations D*(D) over bar (s) – D (D) over bar*(s) and D*(D) over bar*(s) (or, equivalently, quark content c (c) over bars (q) over bar, with q = u, d). The quantum numbers of these Z(cs) and Z(cs)* structures would be I(J(P)) = 1/2 (1(+)). The predicted masses of these partners depend on the details of the theoretical scheme used, but they should be around the D*(D) over bar (s) – D (D) over bar*(s) and D*(D) over bar*(s) thresholds, respectively. Moreover, any of these states could be either a virtual pole or a resonance. We show that, together with a possible triangle singularity contribution, such a picture nicely agrees with the very recent BESIII data of the e(+)e(-) -> K+((Ds-D*0) + D*D--(s)0).
%R 10.1103/PhysRevD.103.074029
%U https://arxiv.org/abs/2011.08725
%U https://doi.org/10.1103/PhysRevD.103.074029
%P 074029-8pp