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Link to original content: http://ncatlab.org/nlab/show/bag model of quark confinement
algebraic quantum field theory (perturbative, on curved spacetimes, homotopical)
quantum mechanical system, quantum probability
interacting field quantization
fields and particles in particle physics
and in the standard model of particle physics:
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 () | |||
| up-type | up quark () | charm quark () | top quark () |
| down-type | down quark () | strange quark () | bottom quark () |
| leptons | |||
| charged | electron | muon | tauon |
| neutral | electron neutrino | muon neutrino | tau neutrino |
| bound states: | |||
| mesons | light mesons: pion () ρ-meson () ω-meson () f1-meson a1-meson | strange-mesons: ϕ-meson (), kaon, K*-meson (, ) eta-meson () charmed heavy mesons: D-meson (, , ) J/ψ-meson () | bottom heavy mesons: B-meson () ϒ-meson () |
| baryons | nucleons: proton neutron |
(also: antiparticles)
hadrons (bound states of the above quarks)
minimally extended supersymmetric standard model
bosinos:
dark matter candidates
Exotica
In nuclear physics (quantum chromodynamics) the bag model is an ad hoc effective model of quark confinement in hadrons, assuming literally that the quarks are constrained within an impenetrable membrane, the “bag”.
The Cheshire cat principle is the observation that this “bag” is not actually observable.
The Cheshire Cat Principle follows in holographic QCD, where the baryons are holographically realized as Skyrmions:
The Skyrmion is the ultimate topological bag model with zero size bag radius, lending further credence to the Cheshire cat principle. (Nielsen-Zahed 09)
effective field theories of nuclear physics, hence for confined-phase quantum chromodynamics:
Textbook account:
See also:
Atsushi Hosaka, Hiroshi Toki, Chiral bag model for the nucleon, Phys. Rept. 277 (1996) 65-188 (spire:429251, doi:10.1016/S0370-1573(96)00013-0)
Julius Kuti, Section 3 of: Quark confinement and the quark model, CERN - JINR School of Physics, Nafplion, Greece, 22 May - 4 Jun 1977, pp.79-128 (CERN-1977-018) (doi:10.5170/CERN-1977-018.79, pdf)
Luiz L. Lopes, Carline Biesdorf, Débora P. Menezes, Modified MIT Bag Models: Thermodynamic consistency, stability windows and symmetry group (arXiv:2005.13136)
Luiz L. Lopes, Carline Biesdorf, K. D. Marquez, Debora P. Menezes, Modified MIT Bag Models pt II: QCD phase diagram, hot quark stars and speed of sound (arXiv:2009.13552)
Amirhossein Rezaei, Mohammad Parsa Akrami, Exact and Efficient Numerical approaches to MIT Bag Model [arXiv:2403.15833]
Via worldline formalism:
In relation to the Skyrmion model:
Combination of the omega-meson-stanilized Skyrme model with the bag model for nucleons:
From the point of view of holographic QCD:
Last revised on March 26, 2024 at 07:23:01. See the history of this page for a list of all contributions to it.