Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Precision measurements of charm hadron properties at Babar   We present preliminary results on the natural line width, $\Gamma(D^{*+})$,
in the transition $D^{*}(2010)^{+} \rightarrow D^0 \pi^+$. The $D^0$ is
reconstructed in two decay channels: $D^0 \rightarrow K^-\pi^+$ and $D^0
\rightarrow K^-\pi^+\pi^-\pi^+$. We use Monte Carlo to simulate our
reconstruction resolution in the difference of the reconstructed $D^{*+}$ and
reconstructed $D^0$ masses. We fit a relativistic P-wave Breit-Wigner form
convolved with the measured resolution, together with a background function, to
the mass difference distribution. For the decay mode $D^0\rightarrow K^-\pi^+$
we obtain $\Gamma = 83.5 \pm 1.7 \pm 1.2$ keV and $\Delta m = m_{D^{* +}} -
m_{D^0} = 145425.5 \pm 0.6 \pm 2.6$ keV, where the quoted errors are
statistical and systematic, respectively. For the $D^0\rightarrow
K^-\pi^+\pi^-\pi^+$ mode, we do not quote a width measurement at this time, but
measure $\Delta m = m_{D^{* +}} - m_{D^0} = 145426.5 \pm 0.4 \pm 2.6 $ keV.
Additionally, we present preliminary results from the decay mode $\Lambda_c
(2880)^+ \rightarrow \Lambda_c^+\pi^+\pi^-$ for the mass, width and
quasi-two-body branching ratios of the $\Lambda_c(2880)^+$ baryon. We measure
$m(\Lambda_c(2880)^+) - m(\Lambda_c(2286)^+) = 594.9 \pm 0.4 \pm 0.3$ MeV and
$\Gamma(\Lambda_c(2880)^+) = 6.2 \pm 1.4 \pm 1.5$ MeV, where the errors are
statistical and systematic, respectively.

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The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
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The categories of this paper are: eess
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-th
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The categories of this paper are: q-alg
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The categories of this paper are: chao-dyn