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Author  |
Esser, F.; Graf, L.; Hati, C. |
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Title |
Cartography of LNV dim-9 SMEFT: implications for radiative neutrino masses and 0νββ |
Type |
Journal Article |
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Year |
2026 |
Publication |
Journal of High Energy Physics |
Abbreviated Journal |
J. High Energy Phys. |
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Volume |
07 |
Issue |
7 |
Pages |
206 - 46pp |
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Keywords |
Baryon/Lepton Number Violation; Rare Decays; SMEFT; Specific BSM Phenomenology |
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Abstract |
We perform a systematic study of lepton-number-violating (LNV) dimension-9 operators in the Standard Model Effective Field Theory (SMEFT) that can mediate neutrinoless double beta decay (0 nu beta beta) at tree level, and map them to their possible tree-level ultraviolet completions. Using a diagram-based classification, we enumerate all such completions and isolate minimal two-particle models that avoid generating the dimension-5 Weinberg operator or dimension-7 LNV operators at tree level. We then chart how these minimal models populate the operator landscape and organise them by the loop order at which they radiatively induce lower-dimensional LNV operators, highlighting scenarios in which the tree-level dimension-9 contribution can compete with or dominate loop-suppressed neutrino-mass (dimension-5) effects. Representative one-loop and two-loop classes are matched onto the SMEFT, and their implications for neutrino masses, charged-lepton flavour violation, and the relative size of dimension-9 versus dimension-5 contributions to 0 nu beta beta are analysed, delineating regions of parameter space where upcoming experiments can be sensitive to genuinely short-range LNV dynamics. |
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Address |
[Esser, Fabian; Graf, Lukas] Charles Univ Prague, Inst Particle & Nucl Phys IPNP, Fac Math & Phys, 5 Holesovickach 2, Prague 8, Czech Republic, Email: fabian.esser@matfyz.cuni.cz; |
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Springer |
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English |
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Notes |
WOS:001830002900005 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
7338 |
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