Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Upper Bound on the Strongly Forbidden $6S_{1/2} \leftrightarrow
  5D_{3/2}$ Magnetic Dipole Transition Moment in {Ba}$^{+}$   We report the results from our first-generation experiment to measure the
magnetic-dipole transition moment (M1) between the $6S_{1/2}$ and $5D_{3/2}$
manifolds in Ba$^{+}$. Knowledge of M1 is crucial for the proposed
parity-nonconservation experiment in the ion \cite{Fortson93}, where M1 will be
a leading source of systematic error. To date, no measurement of M1 has been
made in Ba$^{+}$, and moreover, the sensitivity of the moment to
electron-electron correlations has confounded accurate theoretical predictions.
A precise measurement may help to resolve the theoretical discrepancies while
providing essential information for planning a future PNC measurement in
Ba$^{+}$. We demonstrate our technique for measuring M1 - including a method
for calibrating for stress-induced birefringence introduced by the scientific
apparatus - and place an upper bound of $\mathrm{M1} < 93 \pm 39 \times 10^{-5}
\mu_{B}$.

12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: stat
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
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The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph