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arXiv · 2109.08172

Lepton Number Violation: from $0\nu\beta\beta$ Decay to Long-Lived Particle Searches

Gang Li·Michael J. Ramsey-Musolf·Shufang Su·Juan Carlos Vasquez
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Abstract

We study the complementary tests of lepton number violation in $0\nu\beta\beta$-decay experiments, long-lived particle (LLP) searches at the LHC main detectors ATLAS/CMS, and a proposed far detector MATHUSLA. In the context of a simplified model with a scalar doublet $S$ and a Majorana fermion $F$, we show that while the $0\nu\beta\beta$-decay experiments can probe a larger portion of parameter space, the LLP searches can uniquely probe the region of smaller couplings and masses if $S$ is at TeV scale while $F$ is at or below the electroweak scale. We also investigate constraints on the parameter space from the existing searches that are insensitive to lepton number violation.

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Gang Li, Michael J. Ramsey-Musolf, Shufang Su, Juan Carlos Vasquez. 2021-09-16. Lepton Number Violation: from $0\nu\beta\beta$ Decay to Long-Lived Particle Searches. https://doi.org/10.1103/physrevd.105.115018

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