2020/12/31 by Benjamin Fuks, J. Neundorf, Jonas Neundorf +6
Physics and Astronomy · Social Sciences · #Computer science #International Science and Diplomacy #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevd.103.115014
published as Phys. Rev. D 103, 115014 (2021) · Journal version. 9 pages including an extended technical appendix; 4 figures; 4 tables; UFO models available from https://feynrules.irmp.ucl.ac.be/wiki/SMWeinberg
openalex created_date 2021/01/05 · openalex publication_date 2021/06/11 · arxiv created 2021/06/14 · arxiv updated 2021/06/16 · openalex updated_date 2026/08/05
Motivated by searches for 0\ensuremathν\ensuremathβ\ensuremathβ decay in nuclear experiments and collider probes of lepton number violation at dimension d\ensuremath≥7, we investigate the sensitivity to the d=5 Weinberg operator using the nonresonant signature pp\ensuremath→\ensuremathℓ^\ifmmode±\else\textpm\fi\ensuremathℓ^\ensuremath'^\ifmmode±\else\textpm\fijj at the LHC. We develop a prescription for the operator that is applicable in collisions and decays, and focus on the \ensuremathℓ\ensuremathℓ^\ensuremath'=\ensuremathμ\ensuremathμ channel, which is beyond the reach of nuclear decays. For a Wilson coefficient C5^\ensuremathμ\ensuremathμ=1, scales as heavy as \mathrm\ensuremathΛ\ensuremath∼8.3(11) TeV can be probed with L=300 fb^\ensuremath-1(3 ab^\ensuremath-1). This translates to an effective \ensuremathμ\ensuremathμ Majorana mass of |m_\ensuremathμ\ensuremathμ|\ensuremath∼7.3(5.4) GeV and establishes a road map for testing the Weinberg operator at accelerators.