Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exclusive $D_s$ semileptonic branching fraction measurements   We measure absolute branching fractions for six exclusive $D_s$ semileptonic
decays. We use data collected in the CLEO-c detector from $e^+e^-$
annihilations delivered by the Cornell Electron Storage Ring with a
center-of-mass energy near 4170 MeV. We find $\mathcal{B}(D_s \to \phi e \nu)~=
(2.14 \pm 0.17 \pm 0.09)$%, $\mathcal{B}(D_s \to \eta e \nu)~= (2.28 \pm 0.14
\pm 0.20)$%, and $\mathcal{B}(D_s \to \eta' e \nu)~= (0.68 \pm 0.15 \pm 0.06)$%
for the largest modes, where the first uncertainties are statistical and the
second are systematic. We also obtain $\mathcal{B}(D_s \to K^0 e \nu)~= (0.39
\pm 0.08 \pm 0.03)$%, $\mathcal{B}(D_s \to K^* e \nu)~= (0.18 \pm 0.04 \pm
0.01)$%, and $\mathcal{B}(D_s \to f_0 e \nu, f_0 \to \pi\pi)~= (0.13 \pm 0.02
\pm 0.01)$% for $f_0$ masses within 60 MeV of 980 MeV. We use our results to
determine the $\eta-\eta'$ and $f_0$ mixing angles with $s\bar{s}$, and we
combine our results with lattice calculations to estimate $|V_{cs}|$. This
measurement improves upon the $D_s$ semileptonic branching ratio precision and
provides a new approach for future work that eliminates the $D_s^*$ daughter
photon reconstruction.

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The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom