Flavoured Naturalness

Abstract

We show that a large mixing between the right-handed charm and top squarks (i) is allowed by low-energy flavour constraints; (ii) reduces the experimental bound on the stop mass; (iii) has a mild, but beneficial, effect on fine-tuning; (iv) leads to interesting signatures at the LHC not presently investigated by experiments. We estimate the current bound on the stop mass, in presence of flavour mixing, and discuss the new collider signatures. The signal in the t anti-c (c anti-t) + missing E_T channel is large enough that it can be immediately searched for experimentally, while the signature with same-sign tops and missing E_T requires a luminosity upgrade of the LHC.

20 pages, 12 figures - clarifying comments added, version to be published in JHEP

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• Anatomy of Coannihilation with a Scalar Top Partner
• Prospects for measuring the Higgs coupling to light quarks
• Current experimental bounds on stop mass in natural SUSY
• Charming the Higgs
• SUSY induced top quark FCNC decay $t\to ch$ after Run I of LHC
• Low fine tuning in the MSSM with higgsino dark matter and unification constraints
• Natural Supersymmetry and Implications for Higgs physics
• On the Flavor Structure of Natural Composite Higgs Models & Top Flavor Violation
• Non-Degenerate Squarks from Flavored Gauge Mediation
• A bound on the charm chromo-EDM and its implications
• Light Non-degenerate Composite Partners at the LHC
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• Mixing stops at the LHC
• Top quark FCNCs in extended Higgs sectors
• Top-Flavoured Dark Matter in Dark Minimal Flavour Violation
• Heavy baryons as polarimeters at colliders
• Leading QCD Corrections for Indirect Dark Matter Searches: a Fresh Look
• Linking Natural Supersymmetry to Flavour Physics
• Phenomenology of SUSY with General Flavour Violation
• Flavoured Dark Matter Moving Left
• Boosted Event Topologies from TeV Scale Light Quark Composite Partners
• General squark flavour mixing: constraints, phenomenology and benchmarks
• $h^0\to c\bar{c}$ as a test case for quark flavor violation in the MSSM
• Tasting Flavoured Majorana Dark Matter
• Radiative Decays of the Higgs Boson to a Pair of Fermions
• The Higgs Mass in the MSSM at two-loop order beyond minimal flavour violation
• 1-loop SQCD corrections to the decay of top-squarks to charm and neutralino in the generic MSSM
• Stop Co-Annihilation in the Minimal Supersymmetric Standard Model Revisited
• Flavour-violating decays of mixed top-charm squarks at the LHC
• The Hierarchy Problem and the Cosmological Constant Problem Revisited -- A new view on the SM of particle physics
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• LHC Benchmarks from Flavored Gauge Mediation
• Natural Supersymmetry and Dynamical Flavour with Metastable Vacua
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• Gluino Meets Flavored Naturalness
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• First steps towards the reconstruction of the squark flavour structure
• Signs of Tops from Highly Mixed Stops
• Squark flavour violation and naturalness at the LHC