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Title: Ideal walking dynamics via a gauged NJL model

According to the ideal walking technicolor paradigm, large mass anomalous dimensions arise in gauged Nambu–Jona-Lasinio (NJL) models when the four-fermion coupling is sufficiently strong to induce spontaneous symmetry breaking in an otherwise conformal gauge theory. Therefore, we study the SU(2) gauged NJL model with two adjoint fermions using lattice simulations. The model is in an infrared conformal phase at small NJL coupling while it displays a chirally broken phase at large NJL couplings. In the infrared conformal phase, we find that the mass anomalous dimension varies with the NJL coupling, reaching γm ~ 1 close to the chiral symmetry breaking transition, de facto making the present model the first explicit realization of the ideal walking scenario.
Authors:
 [1] ;  [2] ;  [3]
  1. Duke Univ., Durham, NC (United States). Dept. of Physics
  2. Univ. of Southern Denmark, Odense (Denmark). Dept. of Mathematics and Computer Science (IMADA) and the Centre for Particle Physics Phenomenology-Origins
  3. Univ. of Southern Denmark, Odense (Denmark). Danish Inst. for Advanced Study and the Centre for Particle Physics Phenomenology-Origins; European Organization for Nuclear Research (CERN), Geneva (Switzerland). Theoretical Physics Dept.
Publication Date:
Grant/Contract Number:
FG02-05ER41368; ACI-1053575
Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 96; Journal Issue: 1; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Research Org:
Duke Univ., Durham, NC (United States); Univ. of Southern Denmark, Odense (Denmark)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); Danish National Research Foundation; Lundbeck Foundation; Danish Center for Scientific Computing (DCSC); National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; composite models; dynamical symmetry breaking models; extensions of Higgs sector; large-N expansion in field theory; lattice gauge theory; Non-Albelian gauge theories; nonperturbative effects in field theory; spontaneous symmetry breaking
OSTI Identifier:
1372723
Alternate Identifier(s):
OSTI ID: 1430093