@Article{Helo_etal2016,
author="Helo, J. C.
and Hirsch, M.
and Ota, T.",
title="Long-range contributions to double beta decay revisited",
journal="Journal of High Energy Physics",
year="2016",
publisher="Springer",
volume="06",
number="6",
pages="006--32pp",
optkeywords="Beyond Standard Model; Neutrino Physics",
abstract="We discuss the systematic decomposition of all dimension-7 (d = 7) lepton number violating operators. These d = 7 operators produce momentum enhanced contributions to the long-range part of the 0 nu beta beta decay amplitude and thus are severely constrained by existing half-live limits. In our list of possible models one can find contributions to the long-range amplitude discussed previously in the literature, such as the left-right symmetric model or scalar leptoquarks, as well as some new models not considered before. The d = 7 operators generate Majorana neutrino mass terms either at tree-level, 1-loop or 2-loop level. We systematically compare constraints derived from the mass mechanism to those derived from the long-range 0 nu beta beta decay amplitude and classify our list of models accordingly. We also study one particular example decomposition, which produces neutrino masses at 2-loop level, can fit oscillation data and yields a large contribution to the long-range 0 nu beta beta decay amplitude, in some detail.",
optnote="WOS:000377413400001",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2721), last updated on Thu, 30 Jun 2016 18:04:23 +0000",
issn="1029-8479",
doi="10.1007/JHEP06(2016)006",
opturl="http://arxiv.org/abs/1602.03362",
opturl="https://doi.org/10.1007/JHEP06(2016)006",
archivePrefix="arXiv",
eprint="1602.03362",
language="English"
}