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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| Vydáno v: | The journal of high energy physics Ročník 2018; číslo 11; s. 1 - 19 |
|---|---|
| Hlavní autoři: | , |
| Médium: | Journal Article |
| Jazyk: | angličtina |
| Vydáno: |
Berlin/Heidelberg
Springer Berlin Heidelberg
01.11.2018
Springer Nature B.V SpringerOpen |
| Témata: | |
| ISSN: | 1029-8479, 1029-8479 |
| On-line přístup: | Získat plný text |
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| Shrnutí: | 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. |
|---|---|
| Bibliografie: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 |
| ISSN: | 1029-8479 1029-8479 |
| DOI: | 10.1007/JHEP11(2018)199 |