Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for Lorentz and CPT Violation Effects in Muon Spin Precession   The spin precession frequency of muons stored in the $(g-2)$ storage ring has
been analyzed for evidence of Lorentz and CPT violation. Two Lorentz and CPT
violation signatures were searched for: a nonzero $\Delta\omega_{a}$
(=$\omega_{a}^{\mu^{+}}-\omega_{a}^{\mu^{-}}$); and a sidereal variation of
$\omega_{a}^{\mu^{\pm}}$. No significant effect is found, and the following
limits on the standard-model extension parameters are obtained: $b_{Z} =-(1.0
\pm 1.1)\times 10^{-23}$ GeV; $(m_{\mu}d_{Z0}+H_{XY}) = (1.8 \pm 6.0 \times
10^{-23})$ GeV; and the 95% confidence level limits
$\check{b}_{\perp}^{\mu^{+}}< 1.4 \times 10^{-24}$ GeV and
$\check{b}_{\perp}^{\mu^{-}} < 2.6 \times 10^{-24}$ GeV.

12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int