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Higgs mechanism in nonlocal field theories

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [3];  [4];  [5]
  1. Kobe Univ. (Japan). Faculty of Science; None
  2. Chulalongkorn Univ., Bangkok (Thailand). Dept. of Physics. Faculty of Science
  3. Kobe Univ. (Japan). Dept. of Physics
  4. Univ. of Wisconsin, Madison, WI (United States). Dept. of Physics
  5. Heidelberg Univ. (Germany). Inst. for Theoretical Physics
We study spontaneous gauge symmetry breaking and the Higgs mechanism in nonlocal field theories. Motivated by the level truncated action of string field theory, we consider a class of nonlocal field theories with an exponential factor of the d’Alembertian attached to the kinetic and mass terms. Modifications of this kind are known to make mild the UV behavior of loop diagrams and thus have been studied not only in the context of string theory but also as an alternative approach to quantum gravity. In this paper we argue that such a nonlocal theory potentially includes a ghost mode near the nonlocal scale in the particle spectrum of the symmetry broken phase. This is in sharp contrast to local field theories and would be an obstruction to making a simple nonlocal model a UV complete theory. We then discuss a possible way out by studying nonlocal theories with extra symmetries such as gauge symmetries in higher spacetime dimensions.
Research Organization:
Kobe Univ. (Japan); Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Organization:
Japan Society for the Promotion of Science (JSPS); Ministry of Education, Culture, Sports, Science and Technology (MEXT) (Japan); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Grant/Contract Number:
SC0017647
OSTI ID:
1512410
Journal Information:
Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 8 Vol. 2018; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (7)

Quantum Field Theory at high multiplicity: The Higgsplosion mechanism preprint January 2020
Nonlocal gravity with worldline inversion symmetry journal January 2020
Nonlocal star as a blackhole mimicker journal July 2019
Nonlocal generalization of Galilean theories and gravity journal July 2019
Nonlocal generalization of Galilean theories and gravity text January 2018
Nonlocal star as a blackhole mimicker text January 2019
Nonlocal gravity with worldline inversion symmetry text January 2019

Figures / Tables (3)


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