nLab charmonium

Redirected from "J/ψ-meson".

Contents

Context

Fields and quanta

fields and particles in particle physics

and in the standard model of particle physics:

force field gauge bosons

photon - electromagnetic field (abelian Yang-Mills field)
W, Z, B-boson - electroweak field (Yang-Mills field)
gluon - strong nuclear force (Yang-Mills field)
graviton - field of gravity
infraparticle

scalar bosons

Higgs boson, inflaton (scalar field)

matter field fermions (spinors, Dirac fields)

flavors of fundamental fermions in the standard model of particle physics:
generation of fermions	1st generation	2nd generation	3d generation
quarks ( $q$ )
up-type	up quark ( $u$ )	charm quark ( $c$ )	top quark ( $t$ )
down-type	down quark ( $d$ )	strange quark ( $s$ )	bottom quark ( $b$ )
leptons
charged	electron	muon	tauon
neutral	electron neutrino	muon neutrino	tau neutrino

bound states:
mesons	light mesons: pion ( $u d$ ) ρ-meson ( $u d$ ) ω-meson ( $u d$ ) f1-meson a1-meson	strange-mesons: ϕ-meson ( $s \bar s$ ), kaon, K-meson ( $u s$ , $d s$ ) eta-meson ( $u u + d d + s s$ ) charmed heavy mesons*: D-meson ( $u c$ , $d c$ , $s c$ ) J/ψ-meson ( $c \bar c$ )	bottom heavy mesons: B-meson ( $q b$ ) ϒ-meson ( $b \bar b$ )
baryons	nucleons: proton $(u u d)$ neutron $(u d d)$

(also: antiparticles)

effective particles

Goldstone bosons

hadrons (bound states of the above quarks)

meson
- scalar meson
  - σ-meson
  - pion
  - kaon
  - D-meson
  - B-meson
- vector meson
  - ω-meson
  - ρ-meson
  - f1-meson
  - a1-meson
  - b1-meson
  - h1-meson
  - K*-meson
- tensor meson
- quarkonium
  - charmonium
  - ϒ-meson
exotic meson
- XYZ meson
- tetraquark
baryon
- nucleon
  - proton
  - neutron
  - chemical element
    - carbon
    - nitrogen
- Lambda baryon
- pentaquark

in grand unified theory

minimally extended supersymmetric standard model

superpartners

bosinos:

gravitino - field of supergravity (Rarita-Schwinger field)
gaugino - super Yang-Mills field
gluino

squark

dark matter candidates

WIMP
axion

Exotica

auxiliary fields

Contents

Idea
Related concepts
References

Idea

In quantum hadrodynamics, charmonium $J/\psi$ is the charm-form of quarkonium: a meson which is a bound state of a charm quark and its antiparticle.

Related concepts

XYZ particle

References

An-Ping Chen, Yan-Qing Ma, Hong Zhang, A short theoretical review of charmonium production (arXiv:2109.04028)

See also

Wikipedia, J/psi meson

On the Dalitz decay of charmonium:

Study of the Dalitz decay $J/\psi \to e^+e^- \eta$ , Phys. Rev. D 99, 012006 (2019) (arXiv:1810.03091)

Discussion via AdS/QCD:

Miguel Angel Martin Contreras, Saulo Diles, Alfredo Vega, Heavy quarkonia spectroscopy at zero and finite temperature in bottom-up AdS/QCD (arXiv:2101.06212)

Observation of a charmonium decay products interpreted as originating from a fully charmed tetraquark:

LHCb collaboration, Observation of structure in the $J/\psi$ -pair mass spectrum, Science Bulletin 65 (2020) 1983 (arXiv:2006.16957, doi:10.1016/j.scib.2020.08.032, CERN news)

reviewed in

Jean-Marc Richard, About the $J/\psi J/\psi$ peak of LHCb: fully-charmed tetraquark?, Science Bulletin Volume 65, Issue 23, 15 December 2020, Pages 1954-1955 (arXiv:2008.01962, doi:10.1016/j.scib.2020.08.020)

Last revised on September 12, 2021 at 16:52:05. See the history of this page for a list of all contributions to it.