Modified dispersion relations and a potential explanation of the EDGES anomaly
arXiv:2110.02340 · doi:10.1140/epjc/s10052-022-10680-8
Abstract
The Experiment to Detect the Global Epoch of Reionisation Signature (EDGES) collaboration has recently reported an important result related to the absorption signal in the Cosmic Microwave Background radiation spectrum. This signal corresponds to the red-shifted 21-cm line at , whose amplitude is about twice the expected value. This represents a deviation of approximately from the predictions of the standard model of cosmology, i.e. the CDM model. This opens a window for testing new physics beyond both the standard model of particle physics and the CDM model. In this work, we explore the possibility of explaining the EDGES anomaly in terms of modified dispersion relations. The latter are typically induced in unified theories and theories of quantum gravity, such as String/M-theories and Loop Quantum Gravity. These modified dispersion relations affect the density of states per unit volume and thus the thermal spectrum of the Cosmic Microwave Background photons. The temperature of the 21-cm brightness temperature is modified accordingly giving a potential explanation of the EDGES anomaly.
arXiv comment11 pages, 8 figures
References in corpus (67)
- String Theory and Noncommutative Geometry
- M Theory As A Matrix Model: A Conjecture
- Quantum Gravity at a Lifshitz Point
- The Cosmic Microwave Background Spectrum from the Full COBE/FIRAS Data Set
- Cosmology at Low Frequencies: The 21 cm Transition and the High-Redshift Universe
- Potential Sensitivity of Gamma-Ray Burster Observations to Wave Dispersion in Vacuo
- The Temperature of the Cosmic Microwave Background
- An absorption profile centred at 78 megahertz in the sky-averaged spectrum
- Relativity in space-times with short-distance structure governed by an observer-independent (Planckian) length scale
- Noncommutative Field Theory and Lorentz Violation
- 21-cm cosmology
- Nonstandard optics from quantum spacetime
- Testable scenario for Relativity with minimum-length
- Spectral Dimension of the Universe in Quantum Gravity at a Lifshitz Point
- The Trans-Planckian Problem of Inflationary Cosmology
- Quantum Spacetime Phenomenology
- Universality of Quantum Gravity Corrections
- Probing Planck-scale physics with quantum optics
- Gravity's Rainbow
- Possible interaction between baryons and dark-matter particles revealed by the first stars
- Calibrator Design for the COBE Far Infrared Absolute Spectrophotometer (FIRAS)
- 21 Centimeter Fluctuations from Cosmic Gas at High Redshifts
- A proposal for testing Quantum Gravity in the lab
- Distance Measurement and Wave Dispersion in a Liouville-String Approach to Quantum Gravity
- The Robustness of Inflation to Changes in Super-Planck-Scale Physics
- Quantization of Point Particles in 2+1 Dimensional Gravity and Space-Time Discreteness
- Inflation as a Probe of Short Distance Physics
- Perturbation spectrum in inflation with cutoff
- Mode Generating Mechanism in Inflation with Cutoff
- GUP parameter from quantum corrections to the Newtonian potential
- Uncertainty Relation on World Crystal and its Applications to Micro Black Holes
- Remarks on Inflation and Noncommutative Geometry
- New Physics in the Rayleigh-Jeans Tail of the CMB
- Generalized Uncertainty Principle and Corpuscular Gravity
- Nonsingular Rainbow Universes
- Generalized Uncertainty Principle, Black Holes, and White Dwarfs: A Tale of Two Infinities
- Non-Commutative Inflation
- Open Strings in a B-field Background as Electric Dipoles
- Absence of an Effective Horizon for Black Holes in Gravity's Rainbow
- Black Hole Remnant from Gravity's Rainbow
- Geodesic Structure of the Schwarzschild Black Hole in Rainbow Gravity
- A dark matter interpretation for the ARCADE excess?
- Hawking radiation as tunneling from Gravity's rainbow
- Modified (A)dS Schwarzschild black holes in Rainbow spacetime
- Modified Dispersion Relation, Photon's Velocity, and Unruh Effect
- The 21 cm signal and the interplay between dark matter annihilations and astrophysical processes
- Particle propagation and effective space-time in Gravity's Rainbow
- Axion-Photon Conversion and Effects on 21cm Observation
- A Proposal for Testing Gravity's Rainbow
- Amplified transduction of Planck-scale effects using quantum optics
- Can Early Dark Energy Explain EDGES?
- What gravity waves are telling about quantum spacetime
- Baryon Asymmetry from the Generalized Uncertainty Principle
- Probing relic neutrino decays with 21 cm cosmology
- Casimir effect in quadratic theories of gravity
- Traveling Faster than the Speed of Light in Non-Commutative Geometry
- Intermediate inflation from rainbow gravity
- Bounds on GUP parameters from GW150914 and GW190521
- Quantum-optical tests of Planck-scale physics
- Non-Abelian vacua in D=5, N=4 gauged supergravity
- Time-energy uncertainty relation for neutrino oscillations in curved spacetime
- Maximal momentum GUP leads to quadratic gravity
- Primordial Big Bang Nucleosynthesis and Generalized Uncertainty Principle
- Probing the Universe's Tilt with the Cosmic Infrared Background Dipole
- The EDGES signal: An imprint from the mirror world?
- Test of Quantum Gravity in Statistical Mechanics
- Modified dispersion relations and a potential explanation of the EDGES anomaly