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Dalitz-plot decomposition for the ete → J/ψππ (KK) and e plus e → hππprocesses
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DOI：10.1016/j.physletb.2025.139450.png)
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摘要
En 中文
We present an analysis of the +-- *- / () and +-- *- hprocesses employing the recently proposed Dalitz-plot decomposition approach, which is based on the helicity formalism for three-body decays. For the above reactions, we validate the factorization of the overall rotation for all decay chains and spin alignments, along with the crossing symmetry between final states, using a Lagrangian-based toy model. For the model-dependent factors that describe the subchannel dynamics, we employ the dispersive treatment of the () final state interaction, which accurately reproduces pole positions and couplings of the 0(500) and 0(980) resonances. The constructed amplitudes serve as an essential framework to further constrain the properties of the charged exotic states (3900) and (4020), produced in these reactions.
Keyword:
Helicity formalism
Exotic resonances
Dispersive techniques
