Extra Spacetime Dimensions and Unification

Abstract

We study the effects of extra spacetime dimensions at intermediate mass scales, as expected in string theories with large-radius compactifications, and focus on the gauge and Yukawa couplings within the Minimal Supersymmetric Standard Model. We find that extra spacetime dimensions naturally lead to the appearance of grand unified theories at scales substantially below the usual GUT scale. Furthermore, we show that extra spacetime dimensions provide a natural mechanism for explaining the fermion mass hierarchy by permitting the Yukawa couplings to receive power-law corrections. We also discuss how proton-decay constraints may be addressed in this scenario, and suggest that proton-decay amplitudes may be exactly cancelled to all orders in perturbation theory as a result of new Kaluza-Klein selection rules corresponding to the extra spacetime dimensions.

16 pages, LaTeX, 3 figures; revised and expanded discussion of Yukawa couplings

Cited by in corpus (544)

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• Supergravity Inspired Warped Compactifications and Effective Cosmological Constants
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• Bulk Fermion Stars with New Dimensions
• Universal Extra Dimension models with gravity mediated decays after LHC Run II data
• Low-Scale SU(4)_W Unification
• Minimal and non-minimal Universal Extra Dimension models in the light of LHC data at 13 TeV
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• Rare B decays in a single Universal Extra Dimension scenario
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• Confronting Higgs couplings from D-term extensions and Natural SUSY at the LHC and ILC
• Supersymmetry breaking in 5-dimensional space-time with S**1/Z(2) compactification
• Supersymmetry without the Desert
• Echoes of the fifth dimension?
• The Hierarchy Problem and the Top Yukawa: An Alternative to Top Partner Solutions
• Classification of 5-Dimensional Space-Time with Parallel 3-Branes
• UV completion of extradimensional Yang-Mills theory for Gauge-Higgs unification
• Successful Yukawa structures in Warped Extra Dimensions
• A New Mechanism for Radius Stabilization in Warped Supersymmetry
• Gravitational Origin of Quark Masses in an Extra-Dimensional Brane World
• Electroweak-Higgs Unification and the Higgs Boson Mass
• Brane World Gravity in an AdS Black Hole
• Lightest Kaluza-Klein graviton mode in a backreacted Randall-Sundrum scenario
• Constraints on Universal Extra Dimension models with gravity mediated decays from ATLAS diphoton search
• Phenomenology of the 1/N${}_f$ Expansion for Field Theories in Extra Dimensions
• Fat brane, dark matter and localized kinetic terms in six dimensions
• Constraining Bosonic Supersymmetry from Higgs results and 8 TeV ATLAS multi-jets plus missing energy data
• Renormalization and ultraviolet sensitivity of gauge vertices in universal extra dimensions
• Gauge Coupling Unification in a 6D SO(10) Orbifold GUT
• Two-loop corrections and predictability on orbifold
• Deconstructing Superconductivity
• A simple 5D SO(10) GUT and sparticle masses
• Sculpting the Standard Model from low-scale Gauge-Higgs-Matter $E_8$ Grand Unification in ten dimensions
• Power law in a gauge-invariant cut-off regularisation
• Softening of SUSY flavor problem from asymptotically free bulk interactions
• Compactified extra dimension and entanglement island as clues to quantum gravity
• Compactified Quantum Fields. Is there Life Beyond the Cut-off Scale?
• Options for Orbifold-GUT Model Building from Five-Dimensional Supergravity
• A Bulk Effect to SUSY Effective Potential in a 5D Super-Yang-Mills Model
• Constraints on realistic Gauge-Higgs unified models
• Top quark physics in the Large Hadron Collider era
• Extra dimensions prefer large $\tan \beta$
• Adjoint bulk scalars and supersymmetric unification in the presence of extra dimensions
• Fat brane and seesaw mechanism in extra dimensions
• The impact of nonminimal Universal Extra Dimensional model on $\Delta B=2$ transitions
• Seeking TeV-Scale Quantum Gravity at an $e\gamma$ collider
• Absolutely Stable Proton and Lowering the Gauge Unification Scale
• Dilepton + jet signature of Split-UED at the LHC
• Production of the top-pions from the higgsless--top-Higgs model at the LHC
• Mini Black Holes at the LHC: Discovery Through Di-Jet Suppression, Mono-Jet Emission and a Supersonic Boom in the Quark-Gluon Plasma in ALICE, ATLAS and CMS
• Precursors From $S^{(1)}/Z_2\tm Z_2'$ Orbifold GUTs
• Spacetime is spinorial; new dimensions are timelike
• The lightest Higgs boson mass in effective field theory with bulk and brane supersymmetry breaking
• Revisiting instabilities of $S^1/Z_2$ models with loop-induced Fayet-Iliopoulos terms
• Decline and Fall of the Standard Model?
• Extra-dimensional gravity and dijet production at gamma gamma colliders
• Intermediate-scale vertex corrections for zero mode in warped space
• Light Cone Sum Rules and Form Factors for $p\to e^{+}\gamma$
• Low Energy Gauge Unification Theory
• Possible Limits on Photon Propagation from Quantum Gravity and Space-time Foam
• Possible Scales of New Physics
• Gauge Threshold Corrections in Warped Geometry
• Non Linear Breaking of the Electroweak Symmetry and Large Extra Dimensions
• Bounds on the compactification scale of two universal extra dimensions from exclusive $b\to s\gamma$ decays
• Possible Origin of Fermion Chirality and Gut Structure From Extra Dimensions
• Higgs-Like Field and Extra Dimensions
• Mirage Gauge Coupling Unification and TeV Scale Strings
• TeV-scale gravity in Horava-Witten theory on a compact complex hyperbolic threefold
• d = 11 Supergravity on almost flat R^4 times a compact hyperbolic 7-manifold, and the dip and bump seen in ATLAS-CONF-2010-088
• Natural TeV-Scale Gravity and coupling constant unification, in Heterotic M-Theory, with the usual hidden and visible sectors swapped
• Simple mass relations for bulk fermions
• TeV-scale Supersymmetric Standard Model with Higgs as a Slepton
• Asymptotic grand unification in SO(10) with one extra dimension
• Twisted Boundary Conditions and Matching to the Effective Four Dimensional Theory
• Split supersymmetry and the role of a light fermion in a supergravity-based scenario
• Probing TeV-scale gauge unification by hadronic collisions
• Left-right symmetry, orbifold $S^1/Z_2$, and radiative breaking of $U(1{)}_{\mathrm{R}}\times U(1{)}_{\mathrm{B}-\mathrm{L}}$
• The Earliest Phase Transition?
• Fermion Masses and Mixing in Four and More Dimensions
• Gravity and Large Extra Dimensions
• Moduli Forces in String Models with Large Internal Dimensions
• The Effective Potential And Additional Large Radius Compactified Space-Time Dimensions
• Gauge invariance, quantization and integration of heavy modes in a gauge Kaluza-Klein theory
• New Approach to GUTs
• Most attractive channel for self-breaking of grand unification group symmetry
• Top Mode Standard Model in Six Dimensions
• Large trilinear $A_t$ soft supersymmetry breaking coupling from 5D MSSM
• Natural Supersymmetry and Unification in Five Dimensions
• Belle II Constraints on the Non-Minimal Universal Extra Dimensional Model
• Quantization and High Energy Unitarity in Orbifold Theories
• Bulk Majorons at Colliders
• Proton stability in low-scale extra-dimensional grand unified theories
• Asymptotic Ultraviolet-safe Unification of Gauge and Yukawa Couplings: The exceptional case
• Threshold Effects Beyond the Standard Model
• Analytical Solution for Bosonic Fields in the FRW Multiply Warped Braneworld
• Mass spectrum of scalar and gauge fields in the cosmological multiply warped brane-world
• Unscrambling New Models for Higher-Energy Physics
• Spontaneous and dynamical symmetry breaking in higher-dimensional space-time with boundary terms
• Leptogenesis in five-dimensional asymptotic Grand Unification models
• A Remark on Non-conformal Non-supersymmetric Theories with Vanishing Vacuum Energy Density