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arXiv · 1111.3455

Revisiting No-Scale Supergravity Inspired Scenarios

Amine Benhenni·Jean-Loïc Kneur·Gilbert Moultaka·Sean Bailly
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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 $\eta_0$ (the cosmological constant value at high energy) instead of $\mhalf$ and $\tan \beta$, 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.

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Amine Benhenni, Jean-Loïc Kneur, Gilbert Moultaka, Sean Bailly. 2011-11-15. Revisiting No-Scale Supergravity Inspired Scenarios. https://arxiv.org/abs/1111.3455

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