A high quality composite axion

A bstract The strong CP problem is a compelling motivation for physics beyond the Standard Model. The most popular solutions invoke a global U(1) PQ symmetry, but are challenged by quantum gravitational corrections which are thought to be incompatible with global symmetries, arguing that realistic t...

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Published in:The journal of high energy physics Vol. 2018; no. 11; pp. 1 - 19
Main Authors: Lillard, Benjamin, Tait, Tim M. P.
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.11.2018
Springer Nature B.V
SpringerOpen
Subjects:
Classical and Quantum Gravitation
Confinement
Confining
Elementary Particles
Global Symmetries
High energy physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
Spontaneous Symmetry Breaking
Standard model (particle physics)
String Theory
Supersymmetric Gauge Theory
Supersymmetry
Symmetry
Global Symmetries
Confinement
Spontaneous Symmetry Breaking
Supersymmetric Gauge Theory
ISSN:1029-8479, 1029-8479
Online Access:Get full text
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Summary:A bstract The strong CP problem is a compelling motivation for physics beyond the Standard Model. The most popular solutions invoke a global U(1) PQ symmetry, but are challenged by quantum gravitational corrections which are thought to be incompatible with global symmetries, arguing that realistic theories contain additional structure. We explore a construction in which the U(1) PQ symmetry is protected to arbitrary order by virtue of a supersymmetric, confining SU( N ) L × SU( N ) × SU( N ) R × U(1) X product gauge group, achieving θ ¯ < 10 −11 for an SU(5) model with f a ≲ 3 × 10 11 GeV. This construction leads to low energy predictions such as a U(1) X gauge symmetry, and for X = B − L engineers a naturally O (TeV) value for the μ parameter of the MSSM.
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ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP11(2018)199