Coupled-channel Dalitz plot analysis of D⁺→ K^- π⁺π⁺ decay

2016/10/16 by Nakamura, Satoshi X.
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.1610.04832

Abstract

We demonstrate that partial wave amplitudes extracted from D⁺→ K^-π⁺π⁺ Dalitz plot with a unitary coupled-channel model are significantly different from those obtained with an isobar model. The unitary coupled-channel model takes account of hadronic rescattering mechanisms involving all three mesons that have been missed in conventioanl isobar model analyses. The rescattering mechanisms contribute largely, and can triplicate the D⁺→ K^-π⁺π⁺ decay width within our analysis. These findings deliver a warning that analysis results obtained with isobar models should be looked with a caution. The determination of the CKM angle γ/ϕ₃ is a highly relevant problem.

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