On the hidden charm state at 3872 MeV
نویسنده
چکیده
We discuss some puzzling aspects of the narrow hidden charm resonance that was recently discovered by the Belle Collaboration at mass 3872 MeV. In order to determine its quantum numbers, a crucial piece of information is the spin of the dipion in the decay final state ππJ/ψ. We give the angular distributions and correlations of the final particles in the decay which will provide this information about the nature of this resonance. PACS number(s) 13.25.Gv, 14.40.Gx Typeset using REVTEX
منابع مشابه
2 00 7 New charmonium - like states
In recent years the B-factories and other machines have found evidence for a large number of new states with hidden charm: candidate hc(1P), ηc(2S), and χc2(2P) states; the well-established X(3872); enhancements called X(3940), Y (3940), and Y (4260); and a new structure at 4350 MeV. Various conventional-charmonium and more exotic interpretations of these data have been proposed. In this talk w...
متن کاملAxial Resonances in the Open and Hidden Charm Sectors
A SU(4) flavor symmetrical Lagrangian is constructed for the interaction of the pseudo-scalar mesons with the vector mesons. SU(4) symmetry is broken to SU(3) by suppression of terms in the Lagrangian where the interaction should be driven by charmed mesons. Chiral symmetry can be restored by setting this new SU(4) symmetry breaking parameters to zero. Unitarization in coupled channels leads to...
متن کاملQuarkonium: New Developments
To illustrate the campaign to understand heavy quarkonium systems, I focus on a puzzling new state, X(3872) → ππJ/ψ. Studying the influence of open-charm channels on charmonium properties leads us to propose a new charmonium spectroscopy: additional discrete charmonium levels that can be discovered as narrow resonances of charmed and anticharmed mesons. I recall some expectations for a new spec...
متن کاملMolecular Interpretation of the X(3872)
The discovery of the X(3872) in the 3πJ/ψ mode is compelling evidence for its molecular nature. A successful prediction of this decay mode and other predictions are reviewed here. In September of 2003 the Belle Collaboration announced the discovery of a narrow resonance in ππJ/ψ at 3872 MeV 1. The proximity of the state to D 0 * D 0 threshold generated immediate speculation that it is a ¯ DD * ...
متن کاملRecent issues in open and hidden charm spectroscopy
I present a brief review of results obtained both in open and hidden charm spectroscopy, discussing the interpretation of DsJ(2860), DsJ(2700) and X(3872).
متن کامل