Abstract
In this work, we focus on the great breakthroughs in BESIII and LHCb collaborations, the strange hidden charm tetraquarks Zcs(3985) and Zcs(4000). We aim to clarify the first and foremost question, whether they are the same state. The calculation is performed with a solvable nonrelativistic effective field theory which incorporates heavy quark spin symmetry, SU(3)F symmetry and possible violations comprehensively. Two experimentally accessible consequences with Zcs(3985) and Zcs(4000) as different states are presented, the existence of a tensor D¯s⁎D⁎ resonance and suppression of decay Zcs(3985) → J/ψK. The two predictions can be used to distinguish the two-state scheme from the one-state interpretation.
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