Neutrino scattering on atomic electrons in searches for neutrino magnetic moment

Details Neutrino scattering on atomic electrons in searches for neutrino magnetic moment Neutrino scattering on atomic electrons in searches for neutrino magnetic moment

2010-08-12

arxiv.org/abs/1008.2171v3

Phys.Rev.Lett.105:201801,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages. A clarifying illustrative example added

Scientific paper

10.1103/PhysRevLett.105.201801

The scattering of a neutrino on atomic electrons is considered in the situation where the energy transferred to the electrons is comparable to the characteristic atomic energies, as relevant to the current experimental search for neutrino magnetic moment. The process is contributed by the standard electroweak interaction as well as by the possible neutrino magnetic moment. Quantum mechanical sum rules are derived for the inclusive cross section at a fixed energy deposited in the atomic system, and it is shown that the differential over the energy transfer cross section is given, modulo very small corrections, by the same expression as for free electrons, once all possible final states of the electronic system are taken into account. Thus the atomic effects effectively cancel in the inclusive process.

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