Critical constraints on chiral hierarchies
Journal Article
·
· Physical Review Letters; (United States)
- Department of Physics, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215 (United States) Lyman Laboratory of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States)
Critical dynamics constrains models of dynamical electroweak symmetry breaking in which the scale of high-energy physics is far above 1 TeV. A big hierarchy requires the high-energy theory to have a second-order chiral phase transition, near which the theory is described by a low-energy effective Lagrangian with composite Higgs'' scalars. As scalar theories with more than one [Phi][sup 4] coupling can have a Coleman-Weinberg instability and a [ital first][minus][ital order] transition, such dynamical EWSB models cannot always support a large hierarchy. If the large-[ital N][sub [ital c]] Nambu--Jona-Lasinio model is a good approximation to the top-condensate and strong extended technicolor models, they will not produce acceptable EWSB.
- DOE Contract Number:
- AC02-89ER40509; FG02-91ER40676
- OSTI ID:
- 6710279
- Journal Information:
- Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 70:11; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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