Proton Lifetime from SU(5) Unification in Extra Dimensions

Abstract

We provide detailed estimates of the proton lifetime in the context of simple supersymmetric SU(5) grand unified models with an extra compact spatial dimension, described by the orbifold S/(Z_2 x Z_2') and by a large compactification scale Mc. We focus on a class of models where the grand unified symmetry is broken by the compactification mechanism and where baryon violation proceeds mainly through gauge vector boson exchange so that the proton lifetime scales as the fourth power of Mc. We carefully compute Mc from a next-to-leading analysis of gauge coupling unification and we find that Mc can only be predicted up to an overall factor one hundred. The simplest model, where the dominant decay mode is (pi^0 e+) and has no flavour suppression, is strongly constrained by existing data, but not totally ruled out. We also analyze models where some of the matter fields are localized in the extra space and proton decay is flavour suppressed. In models associated to anarchy in the neutrino sector the preferred decay channel is (K+ {\bar ν}) and the lifetime can be within the reach of the next generation of experiments.

36 pages, 11 figures

References in corpus (28)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• The Snowmass Points and Slopes: Benchmarks for SUSY Searches
• Gauge Unification in Higher Dimensions
• Not Even Decoupling Can Save Minimal Supersymmetric SU(5)
• Brane Couplings from Bulk Loops
• Proton Decay in Minimal Supersymmetric SU(5)
• Proton stability in TeV-scale GUTs
• SO(10) grand unification in five dimensions: Proton decay and the mu problem
• A Complete Theory of Grand Unification in Five Dimensions
• Models of Scherk-Schwarz Symmetry Breaking in 5D: Classification and Calculability
• Proton Decay in a Consistent Supersymmetric SU(5) GUT Model
• Softly Broken Supersymmetric Desert from Orbifold Compactification
• Fermion mixings vs d=6 proton decay
• Strongly Coupled Grand Unification in Higher Dimensions
• The Flavour Hierarchy and See-Saw Neutrinos from Bulk Masses in 5d Orbifold GUTs
• How Long Could We Live?
• Doublet-Triplet Splitting in Realistic Heterotic String Derived models
• Unifying flipped SU(5) in five dimensions
• Desperately Seeking Supersymmetry [SUSY]
• Could we rotate proton decay away?
• Models of Neutrino Masses and Mixings
• Flipping SU(5) Towards Five Dimensional Unification
• Multi-Megaton Water Cherenkov Detector for a Proton Decay Search -- TITAND
• Low Energy Consequences of Five Dimensional SO(10)
• Nucleon Decay Matrix Elements for Domain-Wall Fermions
• Neutrino Democracy, Fermion Mass Hierarchies And Proton Decay From 5D SU(5)
• Nucleon Decay Matrix Elements from Lattice QCD
• Very massive underground detectors for proton decay searches

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• A SUSY SU(5) Grand Unified Model of Tri-Bimaximal Mixing from A4
• Prospects for Beyond the Standard Model Physics Searches at the Deep Underground Neutrino Experiment
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• Underground Neutrino Detectors for Particle and Astroparticle Science: the Giant Liquid Argon Charge Imaging ExpeRiment (GLACIER)
• Elements of F-ast Proton Decay
• Unification and Phenomenology of F-Theory GUTs with U(1)_PQ
• Precision gauge unification in the MSSM
• Searching for the Standard Model in the String Landscape : SUSY GUTs
• SUSY GUT Model Building
• Hidden SUSY from precision gauge unification
• Reconciling Grand Unification with Strings by Anisotropic Compactifications
• Measurement of $K^{+}$ production in charged-current ${\nu }_{\mu }$ interactions
• Lepton Flavour Violation in minimal grand-unified type II seesaw models
• Fermion masses and proton decay in a minimal five-dimensional SO(10) model
• Precision Unification and Proton Decay in F-Theory GUTs with High Scale Supersymmetry
• Measurement of neutral-current $K^{+}$ production by neutrinos using MINERvA
• Gauge coupling Unification and SO(10) in 5D
• Proton decay in flux compactifications
• Statistical significances and projections for proton decay experiments
• Gauge Coupling Unification in Heterotic String Models with Gauge Mediated SUSY Breaking
• Proton Stability In Supersymmetric SU(5)
• Neural-network-driven proton decay sensitivity in the $p\to \bar{\nu }{K}^{+}$ channel using large liquid argon time projection chambers
• Quantization and High Energy Unitarity in Orbifold Theories
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