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Hanhart, C. [Author]; Kalashnikova, Yu. S. [Author]; Kudryavtsev, A. E. [Author]; Nefediev, A. V. [Author]

Reconciling the X(3872) with the near-threshold enhancement in the D-0(D)over-bar(*0) final state

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  • Media type: E-Article
  • Title: Reconciling the X(3872) with the near-threshold enhancement in the D-0(D)over-bar(*0) final state
  • Contributor: Hanhart, C. [Author]; Kalashnikova, Yu. S. [Author]; Kudryavtsev, A. E. [Author]; Nefediev, A. V. [Author]
  • imprint: Soc., 2007
  • Published in: Physical review / D 76(3), 034007 (2007). doi:10.1103/PhysRevD.76.034007
  • Language: English
  • DOI: https://doi.org/10.1103/PhysRevD.76.034007
  • ISSN: 1550-7998
  • Keywords: numerical calculations ; B --> D0 anti-D0 K pi0 ; parametrization ; differential cross section ; X(3872): decay modes ; B: hadronic decay ; mass spectrum: (D0 anti-D0 pi0) ; B: branching ratio ; X(3872): branching ratio ; data analysis method
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  • Description: We investigate the enhancement in the D-0(D) over bar (0)pi(0) final state with the mass M=3875.2 +/- 0.7(-1.6)(+0.3)+/- 0.8 MeV found recently by the Belle Collaboration in the B -> KD0(D) over bar (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(D) over bar (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(D) over bar (*0) channel do the data on the new enhancement comply with those on the X(3872). In our fits, the mass distribution in the D-0(D) over bar (*0) mode exhibits a peak at 2-3 MeV above the D-0(D) over bar (*0) threshold, with a distinctive non-Breit-Wigner shape.
  • Access State: Open Access