Light Stop Decay in the MSSM with Minimal Flavour Violation
arXiv:1102.5712 · doi:10.1007/JHEP04(2011)095
Abstract
In supersymmetric scenarios with a light stop particle and a small mass difference to the lightest supersymmetric particle (LSP) assumed to be the lightest neutralino, the flavour changing neutral current decay can be the dominant decay channel and can exceed the four-body stop decay for certain parameter values. In the framework of Minimal Flavour Violation (MFV) this decay is CKM-suppressed, thus inducing long stop lifetimes. Stop decay length measurements at the LHC can then be exploited to test models with minimal flavour breaking through Standard Model Yukawa couplings. The decay width has been given some time ago by an approximate formula, which takes into account the leading logarithms of the MFV scale. In this paper we calculate the exact one-loop decay width in the framework of MFV. The comparison with the approximate result exhibits deviations of the order of 10% for large MFV scales due to the neglected non-logarithmic terms in the approximate decay formula. The difference in the branching ratios is negligible. The large logarithms have to be resummed. The resummation is performed by the solution of the renormalization group equations. The comparison of the exact one-loop result and the tree level flavour changing neutral current decay, which incorporates the resummed logarithms, demonstrates that the resummation effects are important and should be taken into account.
29 pages
References in corpus (26)
- Minimal Flavour Violation: an effective field theory approach
- SPheno, a program for calculating supersymmetric spectra, SUSY particle decays and SUSY particle production at e+ e- colliders
- SOFTSUSY: a program for calculating supersymmetric spectra
- SUSY Les Houches Accord: Interfacing SUSY Spectrum Calculators, Decay Packages, and Event Generators
- Universal Unitarity Triangle and Physics Beyond the Standard Model
- SUSY Les Houches Accord 2
- SDECAY: a Fortran code for the decays of the supersymmetric particles in the MSSM
- Opening the Window for Electroweak Baryogenesis
- Electroweak Baryogenesis and Higgs and Stop Searches at LEP and the Tevatron
- The Baryogenesis Window in the MSSM
- A light stop and electroweak baryogenesis
- The baryogenesis window in the MSSM
- Bino-driven Electroweak Baryogenesis with highly suppressed Electric Dipole Moments
- Baryogenesis, Electric Dipole Moments and Dark Matter in the MSSM
- Mixing Renormalization in Majorana Neutrino Theories
- MSSM Baryogenesis and Electric Dipole Moments: An Update on the Phenomenology
- Chargino and Neutralino Decays Revisited
- QCD Corrections to Radiative B Decays in the MSSM with Minimal Flavor Violation
- The Two-Loop Finite-Temperature Effective Potential of the MSSM and Baryogenesis
- Upper Bounds on Rare K and B Decays from Minimal Flavour Violation
- Fermion Mixing Renormalization and Gauge Invariance
- The Effective Theory of the Light Stop Scenario
- Mixing Effects in the Finite-Temperature Effective Potential of the MSSM with a Light Stop
- Measuring Flavor Mixing with Minimal Flavor Violation at the LHC
- New physics in CP violation experiments
- Future prospects of B physics
Cited by in corpus (40)
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- MSSM Electroweak Baryogenesis and LHC Data
- Discovery Prospects for NMSSM Higgs Bosons at the High-Energy Large Hadron Collider
- The Extent of the Stop Coannihilation Strip
- Phenomenological Comparison of Models with Extended Higgs Sectors
- Light Stop Searches at the LHC with Monojet Events
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- Opening up the compressed region of stop searches at 13 TeV LHC
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- NLSP Gluino and NLSP Stop Scenarios from b-tau Yukawa Unification
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- Constraints on supersymmetry with light third family from LHC data
- Light Stop Decays: Implications for LHC Searches
- Heavy Scalar Top Quark Decays in the Complex MSSM: A Full One-Loop Analysis
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- Probing the flavor violating scalar top quark signal at the LHC
- Boosted di-boson from a mixed heavy stop
- Top jets as a probe of degenerate stop-NLSP LSP scenario in the framework of cMSSM
- Two Light Stops in the NMSSM and the LHC
- 1-loop SQCD corrections to the decay of top-squarks to charm and neutralino in the generic MSSM
- Next-to-Leading Order NMSSM Decays with CP-odd Higgs Bosons and Stops
- Second Stop and Sbottom Searches with a Stealth Stop
- Light stop/sbottom pair production searches in the NMSSM
- Stop as a next-to-lightest supersymmetric particle in constrained MSSM
- Demystifying the compressed top squark region with kinematic variables
- Towards model-independent exclusion of light Stops
- SUSY signals with small and large trilinear couplings at the LHC 7 TeV runs and neutralino dark matter
- Flavour violating bosonic squark decays at LHC
- Resonant Higgs pair production as a probe of stop at the LHC
- Mixed Stops and the ATLAS on-Z Excess
- LHC Run-3, Yukawa Unification and Dark Matter Implications in SUSY 4-2-2 model
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