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Sequestered string models imply split supersymmetry

Michele Cicoli
(
- Bologna U. and
- INFN, Bologna
)
,
Alessandro Cotellucci
(
- Humboldt U., Berlin
)
,
Hajime Otsuka
(
- Kyushu U., Fukuoka (main)
)

Sep 11, 2023

24 pages

Published in:

JHEP 01 (2024) 059

Published: Jan 11, 2024

e-Print:

2309.05752 [hep-th]

DOI:

10.1007/JHEP01(2024)059

Report number:

KYUSHU-HET-265,
HU-EP-23/44-RTG

View in:

ADS Abstract Service

reference search2 citations

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Abstract: (Springer)

Sequestering is a promising mechanism in 4D string models to reconcile high-scale inflation with low-energy supersymmetry. In this scenario the MSSM lives on branes at singularities and it is sequestered from the sources of supersymmetry breaking in the bulk. The soft-terms are suppressed with respect to the gravitino mass so that all moduli are heavy enough to avoid any cosmological moduli problem. In this paper we study stability bounds and flavour constraints on sequestered string models, finding that they can be satisfied if the soft-terms give rise to a mass spectrum typical of split supersymmetry with TeV-scale gauginos and sfermions around 10

^{7}

GeV. When instead scalar and gaugino masses are of the same order of magnitude, large flavour changing neutral currents can be avoided only by pushing the soft-terms above 10

^{6}

GeV. However this scenario is in tension with stability bounds due to the presence of charge and colour breaking vacua which could be populated in the early universe, and the possible emergence of directions along which the potential is unbounded from below.

Note:

23 pages

String and Brane Phenomenology
Supergravity Models
Superstring Vacua
Supersymmetry Breaking
supersymmetry: split
gravitino: mass
gaugino: mass
mass: gravitation
supersymmetry: symmetry breaking
scale: TeV

References(47)

Figures(0)

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