Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Scattering of $^{7}$Be and $^{8}$B and the astrophysical S$_{17}$ factor   Measurements of scattering of $^{7}$Be at 87 MeV on a melamine (C$_{3}$N$
_{6}$H$_{6}$) target and of $^{8}$B at 95 MeV on C were performed. For $^{7}$Be
the angular range was extended over previous measurements and monitoring of the
intensity of the radioactive beam was improved. The measurements allowed us to
check and improve the optical model potentials used in the incoming and
outgoing channels for the analysis of existing data on the proton transfer
reaction $^{14}$N($^{7}$Be,$^{8}$B)$^{13}$C. The resultslead to an updated
determination of the asymptotic normalization coefficient for the virtual decay
$^{8}$B $\to$ $^{7}$Be + $p$. We find a slightly larger value,
$C_{tot}^{2}(^{8}B)=0.466\pm 0.047$ fm$^{-1}$, for the melamine target. This
implies an astrophysical factor, $S_{17}(0)=18.0\pm 1.8$ eV$\cdot$b, for the
solar neutrino generating reaction $^{7}$Be($p$,$\gamma $)$^{8}$B.

18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
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The categories of this paper are: q-fin
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The categories of this paper are: eess
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys