TY  - JOUR
AU  - Ellis, J.
AU  - Gomez, M. E.
AU  - Lola, S.
AU  - Ruiz de Austri, R.
AU  - Shafi, Q.
PY  - 2020
DA  - 2020//
TI  - Confronting grand unification with lepton flavour violation, dark matter and LHC data
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 197
EP  - 29pp
VL  - 09
IS  - 9
PB  - Springer
KW  - Supersymmetry Phenomenology
AB  - We explore possible signatures for charged lepton flavour violation (LFV), sparticle discovery at the LHC and dark matter (DM) searches in grand unified theories (GUTs) based on SU(5), flipped SU(5) (FSU(5)) and SU(4)(c) x SU(2)(L) x SU(2)(R) (4-2-2). We assume that soft supersymmetry-breaking terms preserve the group symmetry at some high input scale, and focus on the non-universal effects on different matter representations generated by gauge interactions at lower scales, as well as the charged LFV induced in Type-1 see-saw models of neutrino masses. We identify the different mechanisms that control the relic DM density in the various GUT models, and contrast their LFV and LHC signatures. The SU(5) and 4-2-2 models offer good detection prospects both at the LHC and in LFV searches, though with different LSP compositions, and the SU(5) and FSU(5) models offer LFV within the current reach. The 4-2-2 model allows chargino and gluino coannihilations with neutralinos, and the former offer good detection prospects for both the LHC and LFV, while gluino coannihilations lead to lower LFV rates. Our results indicate that LFV is a powerful tool that complements LHC and DM searches, providing significant insights into the sparticle spectra and neutrino mass parameters in different models.
SN  - 1029-8479
UR  - https://arxiv.org/abs/2002.11057
UR  - https://doi.org/10.1007/JHEP09(2020)197
DO  - 10.1007/JHEP09(2020)197
LA  - English
N1  - WOS:000576973000003
ID  - Ellis_etal2020
ER  -