Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: De-excitation gamma-rays from the s-hole state in 15N associated with
  proton decay in 16O   We have measured de-excitation gamma-rays from the s-hole state in 15N
produced via the 16O(p,2p)15N reaction in relation to the study of the nucleon
decay and the neutrino neutral-current interaction in water Cherenkov
detectors. In the excitation-energy region of the s-hole state between 16 MeV
and 40 MeV in 15N, the branching ratio of emitting gamma-rays with the energies
at more-than-6 MeV are found to be 15.6+-1.3+0.6-1.0%. Taking into account the
spectroscopic factor of the s-hole state, the total emission probability is
found to be 3.1%. This is about 1/10 compared with the emission probability of
the 6.32 MeV gamma-ray from the 3/2- p-hole state in 15N. Moreover, we searched
for a 15.1 MeV gamma-ray from the 12C 1+ state which may be populated after the
particle-decay of the s-hole state in 15N. Such a high energy gamma-ray from
the hole state would provide a new method to search for mode-independent
nucleon decay even if the emission probability is small. No significant signal
is found within a statistical uncertainty.

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The categories of this paper are: q-alg
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The categories of this paper are: adap-org
26
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: plasm-ph
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
2
The categories of this paper are: math
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
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The categories of this paper are: ao-sci
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The categories of this paper are: dg-ga
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The categories of this paper are: econ
6
The categories of this paper are: astro-ph