Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Vibronic spectroscopy of sympathetically cooled CaH$^+$   We report the measurement of the 1$^{1}\Sigma\longrightarrow$ 2$^{1}\Sigma$
transition of CaH$^+$ by resonance-enhanced photodissociation of CaH$^+$ that
is co-trapped with laser-cooled Ca$^+$ . We observe four resonances that we
assign to transitions from the vibrational $v$=0 ground state to the $v'$=1-4
excited states based on theoretical predictions. A simple theoretical model
that assumes instantaneous dissociation after resonant excitation yield results
in good agreement with the observed spectral features except for the unobserved
$v'$=0 peak. The resolution of our experiment is limited by the mode-locked
excitation laser, but this survey spectroscopy enables future rotationally
resolved studies with applications in astrochemistry and precision measurement.

1
The categories of this paper are: cs
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas