Reconciling theX(3872)with the near-threshold enhancement in theD0D¯*0final state

2007/04/30 by C. Hanhart, Yu. S. Kalashnikova, A. E. Kudryavtsev +1 · 3 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph

paper · pdf · doi:10.1103/physrevd.76.034007

published as Phys.Rev.D76:034007,2007 · RevTeX4, 17 pages, some references updated and corrected, version published in Phys. Rev. D

openalex publication_date 2007/08/13 · arxiv created 2007/08/27 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

We investigate the enhancement in the D⁰D⁰\ensuremathπ⁰ final state with the mass M=3875.2\ifmmode±\else\textpm\fi0.7_\ensuremath-1.6^+0.3\ifmmode±\else\textpm\fi0.8 MeV found recently by the Belle Collaboration in the B\ensuremath→KD⁰D⁰\ensuremathπ⁰ decay and test the possibility that this is yet another manifestation of the well-established resonance X(3872). We perform a combined Flatt\`e analysis of the data for the D⁰D⁰\ensuremathπ⁰ mode and for the \ensuremathπ⁺\ensuremathπ^\ensuremath-J/\ensuremathψ mode of the X(3872). Only if the X(3872) is a virtual state in the D⁰D^*0 channel do the data on the new enhancement comply with those on the X(3872). In our fits, the mass distribution in the D⁰D^*0 mode exhibits a peak at 2--3 MeV above the D⁰D^*0 threshold, with a distinctive non-Breit-Wigner shape.

Citations

• Observation and Properties of theX(3872)Decaying toJ/ψπ+π−inpp¯Collisions ats=1.96 TeV
• Study of theB−→J/ψK−π+π−decay and measurement of theB−→X(3872)K−branching fraction
• Charmonium: Comparison with experiment
• Observation of a New Narrow Charmonium State in Exclusive B+-->K+ pi+pi- J/psi Decays
• Review of Particle Physics

Cited by

• Radiative E1 decays of X(3872)
• Evidence that the Y(4660) is an f0(980)ψ′ bound state
• Molecular structures in the charmonium spectrum: theXYZpuzzle