Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High sensitivity to mass-ratio variation in deep molecular potentials   Molecular vibrational transitions are prime candidates for model-independent
searches for variation of the proton-to-electron mass ratio. Searches for
present-day variation achieve highest sensitivity with deep molecular
potentials. We identify several high-sensitivity transitions in the deeply
bound ${\rm O}_2^+$ molecular ion. These transitions are electric-dipole
forbidden and thus have narrow linewidths. The most sensitive transitions take
advantage of an accidental degeneracy between vibrational states in different
electronic potentials. We suggest experimentally feasible routes to a
measurement with uncertainty exceeding current limits on present-day variation
in $m_p/m_e$.

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The categories of this paper are: chem-ph
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The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
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The categories of this paper are: econ
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
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The categories of this paper are: eess
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The categories of this paper are: funct-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
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The categories of this paper are: adap-org