Isospin breaking of the narrow charmonium state of Belle at 3872 MeV as a deuson

Abstract

The narrow charmonium state near 3872 MeV reported by the Belle collaboration and confirmedby CDF lies almost exactly at the neutral D anti-D* threshold. As was predicted many years ago it can be a deuteronlike meson-meson state called a deuson. If so, it should be an axial, or possibily a pseudoscalar state with C=0, and isospin predominantly 0. Large isospin breaking is expected because of the isospin mass splitting between the neutral and charged D (D*) mesons. Because of this large isospin breaking the decay X(3872) to J/psi rho would be allowed, while J/psi sigma would be forbidden by C-parity, as indicated by the present data.

arXiv comment7 latex pages 5 figures. This report supercedes the unpublished reminder hep-ph/0308277. Version 2 to appear in Physics Letters B, one reference added and minor improvements

References in corpus (15)

• Observation of a New Narrow Charmonium State in Exclusive B+-->K+ pi+pi- J/psi Decays
• Observation of a narrow charmonium-like state in exclusive B+ -> K+ pi+pi- J/psi decays
• From the Deuteron to Deusons, an Analysis of Deuteronlike Meson-Meson Bound States
• Short Range Structure in the X(3872)
• The D*0 D0bar threshold resonance
• Observation of a near-threshold enhancement in th p pbar mass spectrum from radiative J/psi-->gamma p pbar decays
• Exotic QQ\qbar\qbar States in QCD
• Charmonium Options for the X(3872)
• Interference and binding effects in decays of possible molecular component of X(3872)
• First Measurement of Gamma(D*+) and Precision Measurement of m_D*+ - m_D0
• Observation of $B^{\pm }\to p\bar{p}{K}^{\pm }$
• One-pion-exchange final-state-interaction and the pbar p near threshold enhancement in J/psi -> gamma pbar p decays
• Observation of B0bar --> D(*)0 p pbar
• On the hidden charm state at 3872 MeV
• The upper limit of the e+e- partial width of X(3872)

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• Observation of the decay ${\chi }_{c1}(3872)\to J/\psi {\mu }^{+}{\mu }^{-}$
• The Compact X and Z and their Invisible Molecular Partners
• Production of the $X(3872)$ state via the $B^0\to K^{\ast 0}X(3872)$ decay
• Electromagnetic probes revealing the inner structure of the ${\Lambda }_c(2940)$
• Structure of $X_b$ from line shape analysis
• Investigation of exotic state X(3872) in $pp$ collisions at $\sqrt{s}=$7 and 13 TeV