Word Finder - fermions

definition

(Standard Model) Any elementary or composite particle that has half-integer spin and thus obeys Fermi–Dirac statistics and the Pauli exclusion principle (equivalently, a particle for which the wavefunction of any system of identical such particles changes sign whenever two are swapped); a baryon, a lepton or a quark; (slightly more loosely) any such particle or any composite particle composed of fermions.

example

According to the spin–statistics theorem, the wavefunction of a system of identical fermions (particles of half-integer spin) is antisymmetric under the operation of swapping any two particles.

Microscopically, however, quantal effects of the large, yet finite, ensemble of strongly interacting fermions need to be considered.

Furthermore, the resultant particles, called composite fermions, interact with each other very little.

This is suitable when the bounds of the approximation are known not to change, as staggered fermions.

The archetypal strongly correlated system is that of heavy fermions.

The R2 algorithm is specifically for simulating 2+1 flavors of dynamical staggered fermions of different masses.

These can be safely ignored if domain wall fermions are not being used.

Fermions, spin-1/2 particles (leptons & quarks) are assigned bosonic partners with spin-0, called s leptons and s quarks.

Abstract Last year we proposed using staggered fermions as the light quarks, combined with nonrelativistic heavy quarks, in simulations of heavy-light mesons.

A very interesting symmetry, called supersymmetry, is essentially the unique way to connect bosons with fermions, or equivalently forces with matter.