Using Circular Polarisation to Test the Composition and Dynamics of Astrophysical Particle Accelerators
arXiv:1901.05462 · doi:10.1103/PhysRevD.102.123020
Abstract
We investigate the production of circularly polarised X and gamma-ray signals in cosmic accelerators such as supernova remnants and AGN jets. Proton-proton and proton-photon collisions within these sites produce a charge asymmetry in the distribution of mesons and muons that eventually leads to a net circular polarisation signal as these particles decay radiatively. We find that the fraction of circular polarisation thus produced is at the level of , regardless of the exact beam spectrum, as long as it is made predominantly of protons. While this fraction is very small, the detection of circular polarisation signals in conjunction with high-energy neutrinos would provide an unambiguous signature of the presence of high-energy protons in cosmic accelerators. In Supernovae shocks in particular, this would indicate the presence of relativistic protons hitting stationary protons and/or low-energy photons in the intergalactic or interstellar medium.
16 pages, 11 figures. Accepted version
References in corpus (25)
- PYTHIA 6.4 Physics and Manual
- PYTHIA 6.2 Physics and Manual
- The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
- An Introduction to PYTHIA 8.2
- A Brief Introduction to PYTHIA 8.1
- FeynRules 2.0 - A complete toolbox for tree-level phenomenology
- MadGraph 5 : Going Beyond
- Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector
- UFO - The Universal FeynRules Output
- Tuning PYTHIA 8.1: the Monash 2013 Tune
- Relativistic Jets in Active Galactic Nuclei
- First observation of PeV-energy neutrinos with IceCube
- A Multimessenger Picture of the Flaring Blazar TXS 0506+056: implications for High-Energy Neutrino Emission and Cosmic Ray Acceleration
- Measurement of the Inelastic Proton-Proton Cross Section at TeV with the ATLAS Detector at the LHC
- First Detection of Photons with Energy Beyond 100 TeV from an Astrophysical Source
- Ultra-High-Energy Cosmic Rays
- Measurement of the Crab Nebula Spectrum Past 100 TeV with HAWC
- Possible High-energy neutrinos from the cosmic accelerator RXJ1713.7-3946
- Measurement of charged pion, kaon, and proton production in proton-proton collisions at sqrt(s) = 13 TeV
- TeV Blazars - Observations and Models
- Probing the Emission Mechanism and Magnetic Field of Neutrino Blazars with Multi-Wavelength Polarization Signatures
- On the Prospects for Detecting a Net Photon Circular Polarization Produced by Decaying Dark Matter
- Light Mesons and Muon Radiative Decays and Photon Polarization Asymmetry
- Polarisation of high energy gamma-rays after scattering
- Cosmic ray composition and energy spectrum above 1 TeV: direct and EAS measurements