Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Breakup of $^8$B and the $^7$Be($p,\gamma)^8$B reaction   The calculated rate of events in some of the existing solar neutrino
detectors is directly proportional to the rate of the $^7$Be($p,\gamma)^8$B
reaction measured in the laboratory at low energies. However, the low-energy
cross sections of this reaction are quite uncertain as various measurements
differ from each other by 30-40 %. The Coulomb dissociation process which
reverses the radiative capture by the dissociation of $^8$B in the Coulomb
field of a target, provides an alternate way of accessing this reaction. While
this method has several advantages (like large breakup cross sections and
flexibility in the kinematics), the difficulties arise from the possible
interference by the nuclear interactions, uncertainties in the contributions of
the various multipoles and the higher order effects, which should be considered
carefully. We review the progress made so far in the experimental measurements
and theoretical analysis of the breakup of $^8$B and discuss the current status
of the low-energy cross sections (or the astrophysical $S$-factor) of the
$^7$Be($p,\gamma)^8$B reaction extracted therefrom. The future directions of
the experimental and theoretical investigations are also suggested.

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The categories of this paper are: chem-ph
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The categories of this paper are: supr-con
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The categories of this paper are: eess
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The categories of this paper are: math-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-lat
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The categories of this paper are: q-fin
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The categories of this paper are: atom-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: econ
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The categories of this paper are: stat
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The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph