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Asymptotically Safe Standard Model via Vectorlike Fermions
R B Mann1, J R Meffe1,2, F Sannino2,3,4
1Department of Physics, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
Physical Review Letters
|January 13, 2018
Summary
This study introduces asymptotically safe Standard Model extensions using vectorlike fermions. These models suggest gauge and Higgs couplings can reach an interacting ultraviolet fixed point, crucial for quantum field theory.
Area of Science:
- High Energy Physics
- Quantum Field Theory
- Beyond Standard Model Physics
Background:
- The Standard Model (SM) of particle physics describes fundamental particles and forces but lacks a complete ultraviolet (UV) description.
- Asymptotic safety is a proposed mechanism to achieve a consistent quantum field theory without Landau poles.
Purpose of the Study:
- To construct extensions of the Standard Model that exhibit asymptotic safety.
- To investigate the conditions under which gauge and Higgs couplings can reach an interacting UV fixed point.
Main Methods:
- Introducing gauged vectorlike fermions into the Standard Model.
- Employing large number-of-flavor techniques to analyze renormalization group flow.
Main Results:
- Demonstrated that adding gauged vectorlike fermions can lead to asymptotically safe theories.
- Showed that all gauge couplings, including hypercharge, can reach an interacting UV fixed point.
- Identified conditions where the Higgs coupling also achieves an interacting UV fixed point.
Conclusions:
- Asymptotically safe extensions of the Standard Model are constructible.
- The inclusion of vectorlike fermions provides a viable mechanism for achieving UV completeness in particle physics models.
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