Neutron Majorana mass from Exotic Instantons in a Pati-Salam model

Abstract

We show how exotic stringy instantons can generate an effective interaction between color diquark sextets in a Pati-Salam model, inducing a Majorana mass term for the neutron. In particular, we discuss a simple quiver theory for a Pati-Salam like model, as an example in which the calculations of exotic instantons' effects are simple and controllable. We discuss some different possibilities in order to generate $n-\bar{n}$ oscillation testable in the next generation of experiments, Majorana mass matrices for neutrini and a Post-Sphaleron Baryogenesis scenario. Connections with Dark Matter issues and the Higgs mass Hierarchy problem are discussed, in view of implications for LHC and rare processes physics. The model may be viewed as a completion of Left-Right symmetry, alternative to a GUT-inspired scenario. Combined measures in Neutron-Antineutron physics, FCNC, LHC, Dark Matter could rule out the proposed model or uncover aspects of physics at the Planck scale!

arXiv comment21 pages, 3 figures

References in corpus (30)

• Four-dimensional String Compactifications with D-Branes, Orientifolds and Fluxes
• Three-Family Supersymmetric Standard-like Models from Intersecting Brane Worlds
• Gauge Theories from Toric Geometry and Brane Tilings
• Spacetime Instanton Corrections in 4D String Vacua - The Seesaw Mechanism for D-Brane Models
• An Infinite Family of Superconformal Quiver Gauge Theories with Sasaki-Einstein Duals
• Dimer models and toric diagrams
• GUTs in Type IIB Orientifold Compactifications
• Search for heavy neutrinos and W bosons with right-handed couplings in proton-proton collisions at sqrt(s) = 8 TeV
• The Heterotic Road to the MSSM with R parity
• Reassessing the discovery potential of the $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ decays in the large-recoil region: SM challenges and BSM opportunities
• Heterotic mini-landscape (II): completing the search for MSSM vacua in a Z_6 orbifold
• D-brane Instantons on the T^6/Z_3 orientifold
• Neutron-Anti-Neutron Oscillation: Theory and Phenomenology
• Towards LHC Physics with Non-local Standard Model
• Post-Sphaleron Baryogenesis and an Upper Limit on the Neutron-Antineutron Oscillation Time
• Results on $\beta \beta$ decay with emission of two neutrinos or Majorons in ${}^{76}$Ge from GERDA Phase I
• Minimal Anomalous U(1)' Extension of the MSSM
• Signal of Right-Handed Charged Gauge Bosons at the LHC?
• Neutrino Mass Hierarchy and neutron-anti-neutron Oscillation from Baryogenesis
• Symplectic structure of N=1 supergravity with anomalies and Chern-Simons terms
• Brane Tilings and Specular Duality
• Neutron Majorana mass from exotic instantons
• The Stueckelberg Extension and Milli Weak and Milli Charge Dark Matter
• A new relation between the zero of $A_{FB}$ in $B^0\to K^{\ast }{\mu }^{+}{\mu }^{-}$ and the anomaly in $P_5^{\prime }$
• External stability for Spherically Symmetric Solutions in Lorentz Breaking Massive Gravity
• Kaluza-Klein masses in nonprime orbifolds: Z(12-I) compactification and threshold correction
• Flavor Physics Constraints on TeV Scale Color Sextet Scalars
• Non-Spherical Horizons, I
• A Z-prime interpretation of Bd->K*mu+mu- data and consequences for high energy colliders
• Regge behavior saves String Theory from causality violations

Cited by in corpus (4)

• Exotic see-saw mechanism for neutrinos and leptogenesis in a Pati-Salam model
• Direct generation of a Majorana mass for the Neutron from Exotic Instantons
• Unitarization and Causalization of Non-local quantum field theories by Classicalization
• D-brane Instantons as Gauge Instantons in Orientifolds of Chiral Quiver Theories