An alternative fit to Belle mass spectra for D(D)over-bar, D*(D)over-bar* and Lambda(C)(Lambda)over-bar(C)

摘要

Peaks observed by Belle in D (D) over bar at 3.878 GeV and in D*(D) over bar* at 4.156 GeV may be fitted by phase space multiplied by a form factor with an RMS radius of interaction 0.63 fm. The peak observed in Lambda(C)(Lambda) over bar (C) at 4.63 GeV may be explained by Y (4660), multiplied by a corresponding form factor with RMS radius similar to 0.94 fm.