Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Matter-antimatter asymmetry and chiral behavior in perturbed atom H   Recently, we showed that that band as well as line spectra, reveal a
left-right symmetry in 4- and 2-fermion systems. We now show how a
mass-conjugation explains the difference between atom- and antiatom-states in a
stable 2-unit charge Coulomb system. For the electron-proton system in natural
H, this difference (an anomaly) between states belonging to the hydrogen
(matter) and the antihydrogen (antimatter) anti-world is governed by number
2m(e)/m(H) = 0.0011. This is verified with the H-line spectrum. Classical
physics can describe the parity effects for matter-antimatter asymmetry. An
internal mass-conjugation (internal algebra) extends and generalizes Dirac's
fermion-antifermion symmetry and defies Einstein's Special Theory of Relativity
(STR).

35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ