Rethinking the X(3872)

Burns, T.J.

Abstract

The BaBar analysis which favours 2−+ quantum numbers for the X(3872) implies that it may be none other than the 1 1D2 charmonia state. In that case the isospin breaking in closed flavour modes may be the result of re‐scattering from open flavour. However, the observed production cross section in proton‐antiproton collisions is much larger than expectations, while the mass of the state, compared to the predictions of a string model, is too large. The 1D2 assignment would imply a 3D2 partner nearby in mass, which may be the X(3875). In the tetraquark interpretation the 2−+ assignment implies a rich spectrum of partner states, although the X(3872) may be among the few which are narrow enough to be observable. This talk is based in part on ref. [1].

Citation

Burns, T. (2011). Rethinking the X(3872). In The IX international conference on quark confinement and the hadron spectrum - QCHS IX (397-399). https://doi.org/10.1063/1.3575041

• Publication Date: May 23, 2011
• Deposit Date: May 29, 2013
• Publicly Available Date: Apr 7, 2014
• Volume: 1343
• Pages: 397-399
• Series Title: AIP conference proceedings.
• Series ISSN: 0094-243X,1551-7616
• Book Title: The IX international conference on quark confinement and the hadron spectrum - QCHS IX.
• DOI: https://doi.org/10.1063/1.3575041
• Keywords: X(3872), Charmonium, Tetraquarks.