Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relaxing the Electroweak Scale: the Role of Broken dS Symmetry   Recently, a novel mechanism to address the hierarchy problem has been
proposed \cite{Graham:2015cka}, where the hierarchy between weak scale physics
and any putative `cutoff' $M$ is translated into a parametrically large field
excursion for the so-called relaxion field, driving the Higgs mass to values
much less than $M$ through cosmological dynamics. In its simplest incarnation,
the relaxion mechanism requires nothing beyond the standard model other than an
axion (the relaxion field) and an inflaton. In this note, we critically
re-examine the requirements for successfully realizing the relaxion mechanism
and point out that parametrically larger field excursions can be obtained for a
given number of e-folds by simply requiring that the background break exact de
Sitter invariance. We discuss several corollaries of this observation,
including the interplay between the upper bound on the scale $M$ and the order
parameter $\epsilon$ associated with the breaking of dS symmetry, and entertain
the possibility that the relaxion could play the role of a curvaton. We find
that a successful realization of the mechanism is possible with as few as
$\mathcal O (10^3)$ e-foldings, albeit with a reduced cutoff $M \sim 10^6$ GeV
for a dark QCD axion and outline a minimal scenario that can be made consistent
with CMB observations.

24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
1
The categories of this paper are: cs
18
The categories of this paper are: econ