Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charm: Mixing, CP Violation and Rare Decays at LHCb   Recent results on mixing, CP violation and rare decays in charm physics from
the LHCb experiment are presented. Study of ''wrong-sign'' $D^{0} \rightarrow
K^+ \pi^-$ decays provides the highest precision measurements to date of the
mixing parameters $x^{\prime 2}$ and $y^{\prime}$, and of CP violation in this
decay mode. Direct and indirect CP violation in the $D^0$ system are probed to
a sensitivity of around $10^{-3}$ using $D^0 \rightarrow K^+K^-$ and $D^0
\rightarrow \pi^+\pi^-$ decays and found to be consistent with zero. Searches
for the rare decays $D^+_{(s)} \rightarrow \pi^+\mu^+\mu^-$, $D^+_{(s)}
\rightarrow \pi^-\mu^+\mu^+$ and $D^0 \rightarrow \mu^+\mu^-$ find no evidence
of signal, but set the best limits on branching fractions to date. Thus,
despite many excellent results in charm physics from LHCb, no evidence for
physics beyond the Standard Model is found.

19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math