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Neutrino propagation in nuclear medium and neutrinoless double-beta decay | | S. Kovalenko
; M. I. Krivoruchenko
; F. Simkovic
; | | Date: |
17 Nov 2013 | | Abstract: | We discuss a novel effect in neutrinoless double beta decay related with the
fact that its underlying mechanisms take place in the nuclear matter
environment. We study a particular case of neutrino exchange mechanism and
demonstrate possible impact of nuclear medium via Lepton Number Violating (LNV)
4-fermion neutral current interactions of neutrino with quarks from decaying
nucleus. The net effect of these interactions is generation of an effective
in-medium Majorana neutrino mass matrix. We calculate the corresponding
effective masses and construct the neutrino mixing matrix in nuclear medium for
the complete set of the relevant 4-fermion neutrino-quark operators. Using the
experimental data on neutrinoless double beta decay in combination with the
cosmological and tritium beta decay data we evaluate lower limits on the
characteristic scales of the studied 4-fermion operators. For the LNV scale we
have > 2.4 TeV. | | Source: | arXiv, 1311.4200 | | Services: | Forum | Review | PDF | Favorites | |
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