Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Probing Primordial Chirality with Galaxy Spins   Chiral symmetry is maximally violated in weak interactions, and such
microscopic asymmetries in the early Universe might leave observable imprints
on astrophysical scales without violating the cosmological principle. In this
Letter, we propose a helicity measurement to detect primordial chiral
violation. We point out that observations of halo-galaxy angular momentum
directions (spins), which are frozen in during the galaxy formation process,
provide a fossil chiral observable. From the clustering mode of large scale
structure of the Universe, we construct a spin mode in Lagrangian space and
show in simulations that it is a good probe of halo-galaxy spins. In standard
model, a strong symmetric correlation between the left and right helical
components of this spin mode and galaxy spins is expected. Measurements of
these correlations will be sensitive to chiral breaking, providing a direct
test of chiral symmetry breaking in the early Universe.

12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con