X(3872)
From Infogalactic: the planetary knowledge core
The X(3872) is an anomalous particle with a mass of 3871.68 MeV/c2 [1] which does not fit into the quark model because of its quantum numbers. 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 LHCb Experiment at CERN in March 2013. The values for JPC is 1++.[4]
See also
Notes
- ↑ Particle Data Group Live listings
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Eric S. Swanson, The new heavy mesons: A status report, Physics Reports, Volume 429, Issue 5, July 2006, Pages 243–305
- ↑ LHCb collaboration: Determination of the X(3872) meson quantum numbers
References
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