TY - JOUR
T1 - Configuration mixing in strange tetraquarks Zcs
AU - Karliner, Marek
AU - Rosner, Jonathan L.
N1 - Publisher Copyright:
© 2021 authors. Published by the American Physical Society.
PY - 2021/8/1
Y1 - 2021/8/1
N2 - The BESIII Collaboration has observed a candidate for a cc¯sū tetraquark Zcs at (3982.5-2.6+1.8±2.1) MeV and width (12.8-4.4+5.3±3.0) MeV, while the LHCb Collaboration has observed a Zcs candidate in the J/ψK- channel with mass of (4003±6-14+4) MeV and width (131±15±26) MeV. In this paper, we examine the possibility that these two states are distinct eigenstates of a mixing process similar to that which gives rise to two axial-vector mesons labeled by the Particle Data Group [P. Zyla et al., Prog. Theor. Exp. Phys. 6, 083C01 (2020)PTEPCR2050-3911] K1(1270) and K1(1400). The main point is that on top of a c¯c pair the Zcs states have the same light quark content as the K1-s. In the compact tetraquark picture, this implies several additional states, analogous to members of the K1 nonet. These states have not yet been observed; nor are they required in the molecular approach. Thus, experimental discovery or exclusion of these extra states will be a critical test for competing models of exotic mesons with hidden charm.
AB - The BESIII Collaboration has observed a candidate for a cc¯sū tetraquark Zcs at (3982.5-2.6+1.8±2.1) MeV and width (12.8-4.4+5.3±3.0) MeV, while the LHCb Collaboration has observed a Zcs candidate in the J/ψK- channel with mass of (4003±6-14+4) MeV and width (131±15±26) MeV. In this paper, we examine the possibility that these two states are distinct eigenstates of a mixing process similar to that which gives rise to two axial-vector mesons labeled by the Particle Data Group [P. Zyla et al., Prog. Theor. Exp. Phys. 6, 083C01 (2020)PTEPCR2050-3911] K1(1270) and K1(1400). The main point is that on top of a c¯c pair the Zcs states have the same light quark content as the K1-s. In the compact tetraquark picture, this implies several additional states, analogous to members of the K1 nonet. These states have not yet been observed; nor are they required in the molecular approach. Thus, experimental discovery or exclusion of these extra states will be a critical test for competing models of exotic mesons with hidden charm.
UR - http://www.scopus.com/inward/record.url?scp=85114185065&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.104.034033
DO - 10.1103/PhysRevD.104.034033
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AN - SCOPUS:85114185065
SN - 2470-0010
VL - 104
JO - Physical Review D
JF - Physical Review D
IS - 3
M1 - 034033
ER -