Reconciling the X(3872) with the near-threshold enhancement in the D^0\bar{D}^{*0} final state

Details Reconciling the X(3872) with the near-threshold enhancement in the D^0\bar{D}^{*0} final state Reconciling the X(3872) with the near-threshold enhancement in the D^0\bar{D}^{*0} final state

2007-04-04

arxiv.org/abs/0704.0605v2

Phys.Rev.D76:034007,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

RevTeX4, 17 pages, some references updated and corrected, version published in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.76.034007

We investigate the enhancement in the D^0\bar{D}^0\pi^0 final state with the mass M=3875.2\pm 0.7^{+0.3}_{-1.6}\pm 0.8 MeV found recently by the Belle Collaboration in the B\to K D^0\bar{D}^0\pi^0 decay and test the possibility that this is yet another manifestation of the well-established resonance X(3872). We perform a combined Flatte analysis of the data for the D^0\bar{D}^0\pi^0 mode, and for the \pi^+\pi^- J/\psi mode of the X(3872). Only if the X(3872) is a virtual state in the D^0\bar{D}^{*0} channel, the data on the new enhancement comply with those on the X(3872). In our fits, the mass distribution in the D^0\bar{D}^{*0} mode exhibits a peak at 2-3 MeV above the D^0\bar{D}^{*0} threshold, with a distinctive non-Breit-Wigner shape.

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