Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chiral photoelectron angular distributions from ionization of achiral
  atomic and molecular species   We show that the combination of two achiral components - atomic or molecular
target plus a circularly polarized photon - can yield chirally structured
photoelectron angular distributions. For photoionization of CO, the angular
distribution of carbon K-shell photoelectrons is chiral when the molecular axis
is neither perpendicular nor (anti-)parallel to the light propagation axis. In
photo-double-ionization of He, the distribution of one electron is chiral, if
the other electron is oriented like the molecular axis in the former case and
if the electrons are distinguishable by their energy. In both scenarios, the
circularly polarized photon defines a plane with a sense of rotation and an
additional axis is defined by the CO molecule or one electron. This is
sufficient to establish an unambiguous coordinate frame of well-defined
handedness. To produce a chirally structured electron angular distribution,
such a coordinate frame is necessary, but not sufficient. We show that
additional electron-electron interaction or scattering processes are needed to
create the chiral angular distribution.

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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
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The categories of this paper are: stat
32
The categories of this paper are: atom-ph
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The categories of this paper are: q-alg
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The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ph
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The categories of this paper are: adap-org
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The categories of this paper are: mtrl-th
1
The categories of this paper are: cs