Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gram-scale cryogenic calorimeters for rare-event searches   The energy threshold of a cryogenic calorimeter can be lowered by reducing
its size. This is of importance since the resulting increase in signal rate
enables new approaches in rare-event searches, including the detection of MeV
mass dark matter and coherent scattering of reactor or solar neutrinos. A
scaling law for energy threshold vs. detector size is given. We analyze the
possibility of lowering the threshold of a gram-scale cryogenic calorimeter to
the few eV regime. A prototype 0.5 g Al$_2$O$_3$ device achieved an energy
threshold of (${19.7\pm0.1}$) eV, the lowest value reported for a macroscopic
calorimeter.

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The categories of this paper are: math
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The categories of this paper are: astro-ph
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The categories of this paper are: q-bio
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The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
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The categories of this paper are: alg-geom
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The categories of this paper are: chem-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: stat
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The categories of this paper are: hep-th
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The categories of this paper are: bayes-an
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The categories of this paper are: supr-con
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The categories of this paper are: q-fin