Dalitz Plot Structure in $D^0 o π^ π^- π^0$ - High Energy Physics - PhenomenologyReportar como inadecuado




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Abstract: The BaBar Collaboration has pointed out that $D^0 \to \pi^+ \pi^- \pi^0$ isdominated by an isospin-zero final state, leading to nearly complete depletionof the Dalitz plot along all three diagonals. In flavor-SU3 approaches tocharmed particle decays to a light vector and a light pseudoscalar particle,this behavior is seen, but does not appear to have a fundamental origin.Instead, it arises as a result of approximate cancellation of higher-isospincombinations of several types of amplitudes: color-favored tree,color-suppressed tree, and exchange. Interpretation in terms of adirect-channel effect would require an exotic resonance, with spin, parity, andcharge-congjugation eigenvalues $J^{PC} = 0^{-}$.



Autor: Bhubanjyoti Bhattacharya, Cheng-Wei Chiang, Jonathan L. Rosner

Fuente: https://arxiv.org/







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