Inelastic Scattering of Tritium-Source Antineu- trinos on Electrons of Germanium Atoms
نویسنده
چکیده
This study was performed in connection with the experiment planned by researchers from three institutions (Institute of Theoretical and Experimental Physics, Joint Institute for Nuclear Research, and the All-Russia Research Institute for Experimental Physics) to look for the magnetic moment of the electron neutrino [1]. This experiment is presumed to study the spectra of energy deposited in a detector material upon the inelastic scattering of tritiumsource antineutrinos on atomic electrons. The sensitivity to the magnitude of the neutrino magnetic moment is assumed to be μ ∼ 3× 10−12μB (μB is the Bohr magneton), which is nearly two orders of magnitude better than the upper limit, μ ≤ 2× 10−10μB, set in experiments performed at the Savannah River nuclear reactors, the Rovensk nuclear power plant, and Krasnoyarsk neutrino laboratory [2]. The discovery of the neutrino magnetic moment would suggest the existence of phenomena beyond the fundamentals of electroweak-interaction theory and would have far-reaching consequences for particles physics and astrophysics. (For a discussion on the issues concerning the motivation of searches for the neutrino magnetic moment in laboratory experiments and the status and prospects of investigations along these lines, see, for example, the original study of Neganov et al. [1], the review articles quoted in [3], and references therein.) The magnetic moment can be sought by analyzing the measured spectrum of events of ν̄ee scattering. In the case of scattering on a free electron, the cross section for weak ν̄ee scattering tends to a finite limit, while the cross
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