Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Power Spectrum Analysis of BNL Decay-Rate Data   Evidence for an anomalous annual periodicity in certain nuclear decay data
has led to speculation concerning a possible solar influence on nuclear
processes. As a test of this hypothesis, we here search for evidence in decay
data that might be indicative of a process involving solar rotation, focusing
on data for 32Si and 36Cl decay rates acquired at the Brookhaven National
Laboratory. Examination of the power spectrum over a range of frequencies (10 -
15 year^-1) appropriate for solar synodic rotation rates reveals several
periodicities, the most prominent being one at 11.18 year^-1 with power 20.76.
We evaluate the significance of this peak in terms of the false-alarm
probability, by means of the shuffle test, and also by means of a new test (the
"shake" test) that involves small random time displacements. The last two tests
indicate that the peak at 11.18 year^-1 would arise by chance only once out of
about 10^7 trials. Since there are several peaks in the search band, we also
investigate the running mean of the power spectrum, and identify a major peak
at 11.93 year^-1 with peak running-mean power 4.08. Application of the shuffle
test and the shake test indicates that there is less than one chance in 10^11,
and one chance in 10^15, respectively, finding by chance a value as large as
4.08.

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The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas