The X(3872) boson: Molecule or charmonium

By Mahiko Suzuki. 2005

153 citations recorded by the source corpus.

It has been argued that the mystery boson X(3872) is a molecular state consisting of primarily D{sup 0}{bar D}*{sup 0} + {bar D}{sup 0}D*{sup 0}. In contrast, apparent puzzles and potential difficulties have been pointed out for the charmonium assignment of X(3872). They examine several aspects of these alternatives by semi-quantitative methods since quantitatively accurate results are often hard to reach on them. they point out that some of the observed properties of X(3872), in particular, the binding and the production rates are incompatible with the molecule interpretation. Despite puzzles and obstacles, X(3872) may fit more likely to the excited {sup 3}P{sub 1} charmonium than to the molecule after the mixing of c{bar c} with D{bar D}* + {bar D}D* is taken into account.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/f42e954633bf535eee833a5cbe801454567fb040

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In Nuclear and High Energy Physics

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Citations in the corpus

• The XYZ states: Experimental and theoretical status and perspectives (2019, background): “[529] that the pion cut, if kinematically accessible, should be kept in the calculations.”
• Multiquark Resonances (2016, background): “Furthermore [72], since the X is very close to the DDπ threshold as well (only ≈ 7 MeV), all the long range terms of the S -wave potential are suppressed, leaving only the contact δ(r) term in the mD∗ = mD + mπ limit.”
• The hidden-charm pentaquark and tetraquark states (2016, background): “However, Suzuki pointed out that some of the observed properties of the X(3872) are incompatible with the molecule interpretation [548].”
• Heavy-quark QCD exotica (2016, background): “In fact, an admixture for the X(3872) favoring the cc̄ component had been anticipated already in 2005 [230] on other grounds, as we discuss next.”
• Nonstandard heavy mesons and baryons: Experimental evidence (2017, background): “These considerations imply a kinematic suppression of the amplitude for X(3872) → ωJ/ψ decays relative to the ρJ/ψ channel by a factor of about∼4, in which case the near equality of the ρJ/ψ and ωJ/ψ decay rates implies that an I = 0 assignment is favored (267), but a sizable isovector component in ”