Higgs mechanism in nonlocal field theories
Journal Article
·
· Journal of High Energy Physics (Online)
- Kobe Univ. (Japan). Faculty of Science; None
- Chulalongkorn Univ., Bangkok (Thailand). Dept. of Physics. Faculty of Science
- Kobe Univ. (Japan). Dept. of Physics
- Univ. of Wisconsin, Madison, WI (United States). Dept. of Physics
- 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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