nLab
QCD cosmology

Contents

Context

Fields and quanta

field (physics)

standard model of particle physics

force field gauge bosons

scalar bosons

matter field fermions (spinors, Dirac fields)

flavors of fundamental fermions in the
standard model of particle physics:
generation of fermions1st generation2nd generation3d generation
quarks (qq)
up-typeup quark (uu)charm quark (cc)top quark (tt)
down-typedown quark (dd)strange quark (ss)bottom quark (bb)
leptons
chargedelectronmuontauon
neutralelectron neutrinomuon neutrinotau neutrino
bound states:
mesonslight mesons:
pion (udu d)
ρ-meson (udu d)
ω-meson (udu d)
f1-meson
a1-meson
strange-mesons:
ϕ-meson (ss¯s \bar s),
kaon, K*-meson (usu s, dsd s)
eta-meson (uu+dd+ssu u + d d + s s)

charmed heavy mesons:
D-meson (uc u c, dcd c, scs c)
J/ψ-meson (cc¯c \bar c)
bottom heavy mesons:
B-meson (qbq b)
ϒ-meson (bb¯b \bar b)
baryonsnucleons:
proton (uud)(u u d)
neutron (udd)(u d d)

(also: antiparticles)

effective particles

hadron (bound states of the above quarks)

solitons

minimally extended supersymmetric standard model

superpartners

bosinos:

sfermions:

dark matter candidates

Exotica

auxiliary fields

Cosmology

Contents

Idea

The evolution of the early observable universe must have been crucially affected by the properties (e.g. equation of state) of the primordial quark-gluon plasma, and then, as the temperature decreased, by its confinement phase transition during nucleosynthesis to a hadron gas?. The study of the properties of QCD relevant for cosmology this way is called QCD cosmology.

The crucial effects in QCD cosmology are thus controlled by quantum chromodynamics (QCD) and specifically in its non-perturbative confined phase, hence are subject to the confinement problem.

References

General

  • Paolo Castorina, Vincenzo Greco, Salvatore Plumari, QCD Equation of State and Cosmological Parameters in Early Universe, Phys. Rev. D 92, 063530 (2015) (arXiv:1505.07655)

Via lattice QCD

Application of lattice QCD to QCD cosmology:

  • Michael McGuigan, Wolfgang Söldner, QCD Cosmology from the Lattice Equation of State (arXiv:0810.0265)

  • Sz. Borsanyi et al. Lattice QCD for Cosmology (arXiv:1606.07494)

Last revised on April 10, 2020 at 11:35:57. See the history of this page for a list of all contributions to it.