Gauge boson signals at the cosmological collider
Lian-Tao Wang, Zhong-Zhi Xianyu
Abstract
A bstract We study the production of massive gauge bosons during inflation from the axion-type coupling to the inflaton and the corresponding oscillatory features in the primordial non-Gaussianity. In a window in which both the gauge boson mass and the chemical potential are large, the signal is potentially reachable by near-future large scale structure probes. This scenario covers a new region in oscillation frequency which is not populated by previously known cosmological collider models. We also demonstrate how to properly include the exponential factor and discuss the subtleties in obtaining power dependence of the gauge boson mass in the signal estimate.
Topics & Concepts
PhysicsInflatonParticle physicsGauge bosonInflation (cosmology)Gauge (firearms)ColliderBosonCoupling (piping)Standard Model (mathematical formulation)Cosmic microwave backgroundGauge theorySpectral densityTheoretical physicsPhysics beyond the Standard ModelScale factor (cosmology)Hidden sectorQuantum electrodynamicsSlow rollOscillation (cell signaling)SIGNAL (programming language)UniverseScale (ratio)CosmologyHiggs bosonScalar bosonSupersymmetryParticle physics theoretical and experimental studiesCosmology and Gravitation TheoriesDark Matter and Cosmic Phenomena