Accessing directly the properties of fundamental scalars in the confinement and Higgs phase
arXiv:1007.0729 · doi:10.1140/epjc/s10052-011-1548-y
Abstract
The properties of elementary particles are encoded in their respective propagators and interaction vertices. For a SU(2) gauge theory coupled to a doublet of fundamental complex scalars these propagators are determined in both the Higgs phase and the confinement phase and compared to the Yang-Mills case, using lattice gauge theory. Since the propagators are gauge-dependent, this is done in the Landau limit of 't Hooft gauge, permitting to also determine the ghost propagator. It is found that neither the gauge boson nor the scalar differ qualitatively in the different cases. In particular, the gauge boson acquires a screening mass, and the scalar's screening mass is larger than the renormalized mass. Only the ghost propagator shows a significant change. Furthermore, indications are found that the consequences of the residual non-perturbative gauge freedom due to Gribov copies could be different in the confinement and the Higgs phase.
11 pages, 6 figures, 1 table; v2: one minor error corrected; v3: one appendix on systematic uncertainties added and some minor changes, version to appear in EPJC
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- Scheme dependence of asymptotically free solutions
- On the gauge boson's properties in a candidate technicolor theory
- Yang-Mills theory in the maximal Abelian gauge in presence of scalar matter fields
- Multiple breaking patterns in the Brout-Englert-Higgs effect beyond perturbation theory
- The quenched SU(2) scalar-gluon vertex in minimal Landau gauge
- Gauge engineering and propagators
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- Gribov copies in the quark propagator
- The Fröhlich-Morchio-Strocchi mechanism: A underestimated legacy