Z(4430) Explained
Z(4430) is a mesonic resonance discovered by the Belle experiment.[1] [2] It has a mass of . The resonant nature of the peak has been confirmed by the LHCb experiment with a significance of at least 13.9 σ.[3] The particle is charged and is thought to have a quark content of, making it a tetraquark candidate. It has the spin-parity quantum numbers JP = 1+.
The particle joins the X(3872), Zc(3900) and Y(4140) as exotic hadron candidates observed by multiple experiments, although it is the first to be confirmed as a resonance.[4] [5]
See also
External links
Notes and References
- Choi . S.-K. . Belle Collaboration . Belle experiment . Observation of a resonance-like structure in the Ψ mass distribution in exclusive B→KΨ decays . 2008 . 10.1103/PhysRevLett.100.142001 . 18518023 . Physical Review Letters . 100 . 14 . 142001 . 0708.1790. 2008PhRvL.100n2001C . 119138620 . etal.
- Belle Discovers a New Type of Meson . . 2007 . 2009-06-20 . 2009-01-22 . https://web.archive.org/web/20090122213256/http://www.kek.jp/intra-e/press/2007/BellePress11e.html . dead .
- LHCb collaboration . LHCb . 1404.1903 . Observation of the resonant character of the Z(4430)− state . 2014 . 10.1103/PhysRevLett.112.222002 . 24949760 . 112 . 22 . 222002 . Physical Review Letters . 2014PhRvL.112v2002A. 904429 .
- Web site: LHCb confirms existence of exotic hadrons. CERN. Cian O'Luanaigh. 9 April 2014.
- Web site: Unambiguous observation of an exotic particle which cannot be classified within the traditional quark model. 9 April 2014. European Organization for Nuclear Research.
