X(3872)
The X(3872) is an exotic meson candidate with a mass of 3871.68 MeV/c2[1] which does not fit into the quark model. It was first discovered in 2003 by the Belle experiment[2] in Japan and later confirmed by several other experimental collaborations. Several theories have been proposed for its nature,[3] such as a mesonic molecule or a diquark-antidiquark pair (tetraquark).
The quantum numbers of X(3872) have been determined by the
The first evidence of X(3872) production in theCMS experiment at CERN in January 2022.[5]
See also
Notes
References
- David Harris (13 April 2008). "The charming case of X(3872)". Symmetry Magazine. Retrieved 2009-12-17.
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