Axions from Intersecting Branes and Decoupled Chiral Fermions at the Large Hadron Collider

Abstract

We present a study of a class of effective actions which show typical axion-like interactions, and of their possible effects at the Large Hadron Collider. One important feature of these models is the presence of one pseudoscalar which is a generalization of the Peccei-Quinn axion. This can be very light and very weakly coupled, with a mass which is unrelated to its couplings to the gauge fields, described by Wess Zumino interactions. We discuss two independent realizations of these models, one derived from the theory of intersecting branes and the second one obtained by decoupling one chiral fermion per generation (one right-handed neutrino) from an anomaly-free mother theory. The key features of this second realization are illustrated using a simple example. Charge assignments of intersecting branes can be easily reproduced by the chiral decoupling approach, which remains more general at the level of the solution of its anomaly equations. Using considerations based on its lifetime, we show that in brane models the axion can be dark matter only if its mass is ultralight ($\sim 10^{-4}$ eV), while in the case of fermion decoupling it can reach the GeV region, due to the absence of fermion couplings between the heavy Higgs and the light fermion spectrum. For a GeV axion derived from brane models we present a detailed discussion of its production rates at the LHC.

64 pages, 15 Figs

References in corpus (17)

• Four-dimensional String Compactifications with D-Branes, Orientifolds and Fluxes
• Bose-Einstein Condensation of Dark Matter Axions
• Evidence for a new light spin-zero boson from cosmological gamma-ray propagation?
• Anomalies, Anomalous U(1)'s and generalized Chern-Simons terms
• Laser experiments explore the hidden sector
• Resonantly Enhanced Axion-Photon Regeneration
• Light from the Hidden Sector
• Axion-Like Particles, Cosmic Magnetic Fields and Gamma-Ray Astrophysics
• Minimal Anomalous U(1)' Extension of the MSSM
• Stuckelberg Axions and the Effective Action of Anomalous Abelian Models 1. A unitarity analysis of the Higgs-axion mixing
• The cosmological constant as a manifestation of the conformal anomaly?
• Windows over a New Low Energy Axion
• Stuckelberg Axions and the Effective Action of Anomalous Abelian Models 2. A SU(3)_C x SU(2)_W x U(1)_Y x U(1)_B model and its signature at the LHC
• Trilinear Anomalous Gauge Interactions from Intersecting Branes and the Neutral Currents Sector
• Unitarity Bounds for Gauged Axionic Interactions and the Green-Schwarz Mechanism
• A Light Supersymmetric Axion in an Anomalous Abelian Extension of the Standard Model
• Axion and Neutralinos from Supersymmetric Extensions of the Standard Model with anomalous U(1)'s

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• The physics of a new gauge boson in a Stueckelberg extension of the two-Higgs-doublet model
• Dark Matter as Ultralight Axion-Like particle in $E_6\times U(1{)}_X$ GUT with QCD Axion
• Comments on Anomaly Cancellations by Pole Subtractions and Ghost Instabilities with Gravity
• Relic Densities of Gauged Axions and Supersymmetry
• An Axion-Like Particle from an $SO(10)$ Seesaw with $U(1{)}_X$
• Supersymmetry Breaking in a Minimal Anomalous Extension of the MSSM
• The Effective Actions of Pseudoscalar and Scalar Particles in Theories with Gauge and Conformal Anomalies