Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Structure and dynamics of HD$^+$ in the vicinity of the H$^+$ + D and
  D$^+$ + H dissociation thresholds: Feshbach resonances and the role of
  g/u-symmetry breaking   We report on the measurement and analysis of photoionisation,
mass-analysed-threshold-ionisation and pulsed-field-ionisation
zero-kinetic-energy photoelectron spectra of HD in the vicinity of the
dissociative-ionisation thresholds H$^+$ + D(1s) + e$^-$ and H(1s) + D$^+$ +
e$^-$. The spectra were recorded via the $v=11$-13 vibrational levels of the
$\bar{\rm H}$ and $\bar{\rm B}$ outer wells of the H$\bar{\rm
H}$~$^1\Sigma_g^+$ and B$^{\prime\prime}\bar{\rm B}$~$^1\Sigma_u^+$ states and
provide information on the weakly bound levels of the X$^+$ $^2\Sigma_g^+$
ground state of HD$^+$ with vibrational quantum numbers $v^+=16$-21 and
rotational angular-momentum quantum numbers $N^+=0$-10. The spectra also reveal
for the first time shape and Feshbach resonances of HD$^+$ located
energetically above the H$^+$ + D(1s) dissociation limit. The structure and
dissociation dynamics of the $\bar{\rm H}$ and $\bar{\rm B}$ states of HD and
of the X$^+$ $^2\Sigma_g^+$ and A$^+$ $^2\Sigma_u^+$ states of HD$^+$ near the
dissociation thresholds are strongly influenced by the g/u-symmetry breaking
caused by the nuclear-mass asymmetry.

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The categories of this paper are: astro-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
1
The categories of this paper are: cs
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The categories of this paper are: hep-lat
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-th
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The categories of this paper are: eess
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The categories of this paper are: cond-mat
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg