Revisiting No-Scale Supergravity inspired scenarios : updated theoretical and phenomenological constraints

Abstract

We consider no-scale supergravity inspired scenarios, emphasizing the possible dynamical determination of the soft supersymmetry-breaking parameters as triggered by the radiative corrections that lift an essentially flat tree-level potential in the hidden sector. We (re)emphasize the important role played by the scale-dependent vacuum energy contribution to the effective potential for the occurrence of consistent no-scale minima. The most relevant input parameters are introduced as B 0 (the soft breaking mixing Higgs parameter) and η 0 (the cosmological constant value at high energy) instead of m 1/2 and tan β , the latter being determined through a (generalized) potential minimization at electroweak scales. We examine the theoretical and phenomenological viability of such a mechanism when confronted with up-to-date calculations of the low energy sparticle spectrum and with present constraints from the LHC and other observables. The tight dark matter relic density constraint for a neutralino LSP scenario can be considerably relaxed for a gravitino LSP scenario possible in this framework.

Profumo di SUSY: Suggestive Correlations in the ATLAS and CMS High Jet Multiplicity Data

“…For recent discussions, see Refs. [21,22]. We have demonstrated that this model, dubbed No-Scale F -SU (5) [1][2][3][4][5][23][24][25][26][27][28][29][30], possesses a distinctive collider signal of precisely the type described 1 .…”