Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A precision measurement of the electron's electric dipole moment using
  trapped molecular ions   We describe the first precision measurement of the electron's electric dipole
moment (eEDM, $d_e$) using trapped molecular ions, demonstrating the
application of spin interrogation times over 700 ms to achieve high sensitivity
and stringent rejection of systematic errors. Through electron spin resonance
spectroscopy on $^{180}{\rm Hf}^{19}{\rm F}^{+}$ in its metastable
$^{3}\Delta_{1}$ electronic state, we obtain $d_e = (0.9 \pm 7.7_{\rm stat} \pm
1.7_{\rm syst}) \times 10^{-29}\,e\,{\rm cm}$, resulting in an upper bound of
$|d_e| < 1.3 \times 10^{-28}\,e\,{\rm cm}$ (90% confidence). Our result
provides independent confirmation of the current upper bound of $|d_e| < 9.3
\times 10^{-29}\,e\,{\rm cm}$ [J. Baron $\textit{et al.}$, Science
$\textbf{343}$, 269 (2014)], and offers the potential to improve on this limit
in the near future.

18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs