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In this report, we compare the naturalness and Dark Matter (DM) properties ofthe Minimal Supersymmetric Standard Model (MSSM) and the $B-L$ SupersymmetricStandard Model (BLSSM), with universality in both cases. We do this by adoptingstandard measures for the quantitative analysis of the Fine-Tuning (FT), atboth low (i.e. supersymmetric (SUSY)) and high (i.e. unification) scales. Wewill see a similar level of FT for both models in these scenarios, with aslightly better FT for the BLSSM at SUSY scales and MSSM at Grand UnificationTheory (GUT) scales. When including DM relic constraints, we drasticallyconfine the MSSM's parameter space, whereas we still find a large parameterspace available for the non-minimal scenario.

Naturalness and Dark Matter Properties of the BLSSM