https://doi.org/10.1140/epjc/s10052-022-10923-8
Regular Article - Theoretical Physics
Possibility of 
as the resonance-like structure induced by threshold effects
Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University, 300350, Tianjin, China
Received:
10
September
2022
Accepted:
15
October
2022
Published online:
27
October
2022
We investigate the process 
via several rescattering processes. It is shown that the triangle singularity (TS) peak around the 
threshold generated from the 
loop is relatively narrow, which may simulate the resonance-like structure recently observed by LHCb in the 
spectrum. However, the TS peak around the 
threshold generated from the 
loop is smoothed by the broad width of 
, which itself can hardly describe the structure. A non-resonance TS signal around the DK threshold generated from the 
loop is also predicted.
© The Author(s) 2022
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