https://doi.org/10.1140/epjc/s10052-024-13671-z
Regular Article - Theoretical Physics
Possible signal of an exotic
,
state in the
reaction
1
Department of Physics, Guangxi Normal University, 541004, Guilin, China
2
Guangxi Key Laboratory of Nuclear Physics and Technology, Guangxi Normal University, 541004, Guilin, China
3
School of Physics, Zhengzhou University, 450001, Zhengzhou, China
4
School of Physics, Southeast University, 210094, Nanjing, China
5
Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna, 46071, Valencia, Spain
6
School of Physics, Central South University, 410083, Changsha, China
Received:
11
October
2024
Accepted:
28
November
2024
Published online:
20
December
2024
We study the reaction, showing that a peak in the
mass distribution around
reported by LHCb could be associated with a theoretical exotic state with that mass, a width of
and
, stemming from the interaction of the
and
channels, which is a partner of the
. We show that the data is compatible with this assumption, but also see that the mass distribution itself cannot discriminate between the spins
, 1, 2 of the state. Then we evaluate the momenta of the angular mass distribution and show that they are very different for each of the spin assumptions, and that the momenta coming from interference terms have larger strength at the resonant energy than the peaks seen in the angular integrated mass distribution. We make a call for the experimental determination of these magnitudes, which has already been used by the LHCb in related decay reactions.
© The Author(s) 2024
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