Technicolor On The Lattice
Lattice gauge theory is a non-perturbative method applicable to strongly-interacting technicolor theories, allowing first-principles exploration of walking and conformal dynamics. In 2007, Catterall and Sannino used lattice gauge theory to study SU(2) gauge theories with two flavors of Dirac fermions in the symmetric representation, finding evidence of conformality that has been confirmed by subsequent studies.
As of 2010, the situation for SU(3) gauge theory with fermions in the fundamental representation is not as clear-cut. In 2007, Appelquist, Fleming and Neil reported evidence that a non-trivial infrared fixed point develops in such theories when there are twelve flavors, but not when there are eight. While some subsequent studies confirmed these results, others reported different conclusions, depending on the lattice methods used, and there is not yet consensus.
Further lattice studies exploring these issues, as well as considering the consequences of these theories for precision electroweak measurements, are underway by several research groups.
Read more about this topic: Technicolor (physics)
Famous quotes containing the word technicolor:
“We are always talking about being together, and yet whatever we invent destroys the family, and makes us wild, touchless beasts feeding on technicolor prairies and rivers.”
—Edward Dahlberg (1900–1977)