Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2011-10-04
Phys. Rev. Lett. 108, 052505 (2012)
Physics
Nuclear Physics
Nuclear Theory
5 pages, 4 figures
Scientific paper
10.1103/PhysRevLett.108.052505
It has long been recognized that observation of gamma rays originating from nuclear deexcitation can be exploited to identify neutral-current neutrino-nucleus interactions in water-Cherenkov detectors. We report the results of a calculation of the neutrino- and antineutrino-induced gamma-ray production cross section for oxygen target. Our analysis is focused on the kinematical region of neutrino energy larger than ~200 MeV, in which single-nucleon knockout is known to be the dominant reaction mechanism. The numerical results have been obtained using for the first time a realistic model of the target spectral function, extensively tested against electron-nucleus scattering data. We find that at neutrino energy 600 MeV the fraction of neutral-current interactions leading to emission of gamma-rays of energy larger than 6 MeV is ~41%, and that the contribution of the p_3/2 state is overwhelming.
Ankowski Artur M.
Benhar Omar
Mori Takaaki
Sakuda Makoto
Yamaguchi Ryuta
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