Bayesian analysis of spatial-dependent cosmic-ray propagation: astrophysical background of antiprotons and positrons

Abstract

The AMS-02 experiment has reported a new measurement of the antiproton/proton ratio in Galactic cosmic rays (CRs). In the energy range $E\sim$60-450 GeV, this ratio is found to be remarkably constant. Using recent data on CR proton, helium, and carbon fluxes, 10Be/9Be and B/C ratios, we have performed a global Bayesian analysis based on a Markov-Chain Monte-Carlo sampling algorithm under a "two halo model" of CR propagation. In this model, CRs are allowed to experience a different type of diffusion when they propagate in the region close of the Galactic disk. We found that the vertical extent of this region is about 900 pc above and below the disk, and the corresponding diffusion coefficient scales with energy as $D\sim E^{0.15}$, describing well the observations on primary CR spectra, secondary/primary ratios and anisotropy. Under this model we have carried out improved calculations of antiparticle spectra arising from secondary CR production and their corresponding uncertainties. We made use of Monte-Carlo generators and accelerator data to assess the antiproton production cross-sections and their uncertainties. While the positron excess requires the contribution of additional unknown sources, we found that the new AMS-02 antiproton data are consistent, within the estimated uncertainties, with our calculations based on secondary production.

arXiv comment18 pages, 15 figures, matches published version

References in corpus (65)

• Cosmological parameters from CMB and other data: a Monte-Carlo approach
• EPOS LHC : test of collective hadronization with LHC data
• Cosmic-ray propagation and interactions in the Galaxy
• Monte Carlo treatment of hadronic interactions in enhanced Pomeron scheme: I. QGSJET-II model
• Measurement of separate cosmic-ray electron and positron spectra with the Fermi Large Area Telescope
• The Origin of Galactic Cosmic Rays
• Pulsars as the Sources of High Energy Cosmic Ray Positrons
• Solar Modulation of Cosmic Rays
• Parameterization of Gamma, e^+/- and Neutrino Spectra Produced by p-p Interaction in Astronomical Environment
• Energy Spectra of Abundant Nuclei of Primary Cosmic Rays from the Data of ATIC-2 Experiment: Final Results
• Cosmic-Ray Proton and Helium Spectra from the First CREAM Flight
• Constraints on cosmic-ray propagation models from a global Bayesian analysis
• Cosmic-Ray Nuclei, Antiprotons and Gamma-rays in the Galaxy: a New Diffusion Model
• Production of pions, kaons and protons in pp collisions at $\sqrt{s}=900$ GeV with ALICE at the LHC
• Spectral breaks as a signature of cosmic ray induced turbulence in the Galaxy
• On possible interpretations of the high energy electron-positron spectrum measured by the Fermi Large Area Telescope
• Measurements of cosmic-ray secondary nuclei at high energies with the first flight of the CREAM balloon-borne experiment
• Galactic secondary positron flux at the Earth
• Origin of the Cosmic Ray Spectral Hardening
• Bayesian analysis of cosmic-ray propagation: evidence against homogeneous diffusion
• Testing the Origin of High-Energy Cosmic Rays
• Astrophysical models for the origin of the positron "excess"
• A Markov Chain Monte Carlo technique to sample transport and source parameters of Galactic cosmic rays: II. Results for the diffusion model combining B/C and radioactive nuclei
• High Energy Positrons From Annihilating Dark Matter
• Gamma-ray sky points to radial gradients in cosmic-ray transport
• Unified interpretation of cosmic-ray nuclei and antiproton recent measurements
• AMS-02 antiprotons, at last! Secondary astrophysical component and immediate implications for Dark Matter
• Spectra of Cosmic Ray Protons and Helium Produced in Supernova Remnants
• Signatures of a two million year old supernova in the spectra of cosmic ray protons, antiprotons and positrons
• A Predictive Analytic Model for the Solar Modulation of Cosmic Rays
• A new evaluation of the antiproton production cross section for cosmic ray studies
• Cosmic ray driven Galactic winds
• Systematic uncertainties on the cosmic-ray transport parameters: Is it possible to reconcile B/C data with delta = 1/3 or delta = 1/2?
• Cosmic-ray protons, nuclei, electrons, and antiparticles under a two-halo scenario of diffusive propagation
• Inclusive production of protons, anti-protons and neutrons in p+p collisions at 158 GeV/c beam momentum
• Pulsar interpretation for the AMS-02 result
• Production of Mesons and Baryons at High Rapidity and High Pt in Proton-Proton Collisions at sqrt(s) = 200 GeV
• A new look at the cosmic ray positron fraction
• New calculation of antiproton production by cosmic ray protons and nuclei
• AMS-02 Antiprotons Reloaded
• Spatial-Dependent Diffusion of Cosmic Rays and the Ratio of pbar/p, B/C
• GeV-TeV cosmic-ray spectral anomaly as due to re-acceleration by weak shocks in the Galaxy
• Implications of the AMS-02 positron fraction in cosmic rays
• Proton-Helium Spectral Anomaly as a Signature of Cosmic Ray Accelerator
• Neutron monitors and muon detectors for solar modulation studies: 2. $\varphi$ time series
• The Cosmic Ray Antiproton Background for AMS-02
• Isotopic Composition of Light Nuclei in Cosmic Rays: Results from AMS-01
• Can we explain AMS-02 antiproton and positron excesses simultaneously by nearby supernovae without pulsars nor dark matter?
• Cosmic ray spectral hardening due to dispersion in the source injection spectra
• Secondary antiprotons as a Galactic Dark Matter probe
• The boron-to-carbon abundance ratio and Galactic propagation of cosmic radiation
• The Connection Between the Positron Fraction Anomaly and the Spectral Features in Galactic Cosmic-Ray Hadrons
• CosRayMC: a global fitting method in studying the properties of the new sources of cosmic e${}^{\pm }$ excesses
• Dark matter for excess of AMS-02 positrons and antiprotons
• Origin of the Proton-to-Helium Ratio Anomaly in Cosmic Rays
• Cosmic-Ray Hardenings in the Light of AMS-02
• Cosmic ray electrons and positrons from discrete stochastic sources
• Secondary Cosmic Ray Nuclei from Supernova Remnants and Constraints to the Propagation Parameters
• Propagation of H and He cosmic ray isotopes in the Galaxy: astrophysical and nuclear uncertainties
• Examination of uncertainties in nuclear data for cosmic ray physics with the AMS experiment
• Spatial Dependent Diffusion of Cosmic Rays and the Excess of Primary Electrons Derived from High Precision Measurements by AMS-02
• Cosmic Rays in the Inner Galaxy and the Diffusion Properties of the Interstellar Medium
• Pulsar interpretation of the lepton spectra measured by AMS-02
• Origin of the spectral upturn in the cosmic-ray C/Fe and O/Fe ratios
• Transport of cosmic rays in the nearby starburst galaxy NGC 253

Cited by in corpus (71)

• Cosmic-ray propagation with DRAGON2: I. numerical solver and astrophysical ingredients
• The origin of Galactic cosmic rays: challenges to the standard paradigm
• Dark Matter's secret liaisons: phenomenology of a dark U(1) sector with bound states
• Propagation of cosmic rays in the AMS-02 era
• Cosmic-ray propagation with DRAGON2: II. Nuclear interactions with the interstellar gas
• Understanding the spectral hardenings and radial distribution of Galactic cosmic rays and Fermi diffuse gamma-rays with spatially-dependent propagation
• Combined analysis of AMS-02 (Li,Be,B)/C, N/O, 3He, and 4He data
• AMS-02 antiprotons' consistency with a secondary astrophysical origin
• Evidence for a Time Lag in Solar Modulation of Galactic Cosmic Rays
• Solar and nuclear physics uncertainties in cosmic-ray propagation
• Revisit of cosmic ray antiprotons from dark matter annihilation with updated constraints on the background model from AMS-02 and collider data
• Testing diffusion of cosmic rays in the heliosphere with proton and helium data from AMS
• Numerical modeling of cosmic rays in the heliosphere: Analysis of proton data from AMS-02 and PAMELA
• Revisiting Spatial-Dependent Propagation Model with Latest Observations of Cosmic Ray Nuclei
• The theory of cosmic-ray scattering on pre-existing MHD modes meets data
• Investigating the dark matter signal in the cosmic ray antiproton flux with the machine learning method
• Antiprotons from dark matter annihilation through light mediators and a possible excess in AMS-02 $\bar{p}/p$ data
• The Semi-Hooperon: Gamma-ray and anti-proton excesses in the Galactic Center
• Implications on cosmic ray injection and propagation parameters from Voyager/ACE/AMS-02 nucleus data
• Studies on cosmic ray nuclei with Voyager, ACE and AMS-02: I. local interstellar spectra and solar modulation
• Nearby source interpretation of differences among light and medium composition spectra in cosmic rays
• Explaining cosmic ray antimatter with secondaries from old supernova remnants
• Secondary cosmic-ray nucleus spectra disfavor particle transport in the Galaxy without reacceleration
• A systematic study on the cosmic ray antiproton flux
• Galactic cosmic-ray model in the light of AMS-02 nuclei data
• Constraints on the spatially dependent cosmic-ray propagation model from Bayesian Analysis
• Interpretations of the cosmic ray secondary-to-primary ratios measured by DAMPE
• Bayesian analysis of the break in DAMPE lepton spectra
• Dark Matter Search in Space: Combined Analysis of Cosmic Ray Antiproton-to-Proton Flux Ratio and Positron Flux Measured by AMS-02
• A Genetic Algorithm for Astroparticle Physics Studies
• Numerical modeling of cosmic-ray transport in the heliosphere and interpretation of the proton-to-helium ratio in Solar Cycle 24
• Multi-component Dark Matter in a Simplified E${}_6$SSM Model
• A diffusive origin for the cosmic-ray spectral hardening reveals signatures of a nearbysource in the leptons and protons data
• Constraining the halo size from possible density profiles of hydrogen gas of Milky Way Galaxy
• Temporal evolution and rigidity dependence of the solar modulation lag of Galactic cosmic rays
• Geminga SNR: Possible candidate of local cosmic-ray factory
• Ultrahigh-energy diffuse gamma-ray emission from cosmic-ray interactions with medium surrounding acceleration sources
• Production and acceleration of antinuclei in supernova shockwaves
• On the knee of Galactic cosmic rays in light of sub-TeV spectral hardenings
• Implications of a possible TeV break in the cosmic-ray electron and positron flux
• Bayesian analysis of the hardening in AMS-02 nuclei spectra
• Electron and positron spectra in the three dimensional spatial-dependent propagation model
• The curious case of high-energy deuterons in Galactic cosmic rays
• Statistically study the optimal local sources for cosmic ray nuclei and electron
• Possible bump structure of cosmic ray electrons unveiled by AMS-02 data and its common origin along with the nuclei and positron
• Test of the superdiffusion model in the interstellar medium around the Geminga pulsar
• Development of dark disk model of positron anomaly origin
• Evidence of fresh cosmic ray in galactic plane based on DAMPE measurement of B/C and B/O ratios
• Type II Seesaw with scalar dark matter in light of AMS-02, DAMPE and Fermi-LAT
• Origin of hardening in spectra of cosmic ray nuclei at a few hundred GeV using AMS-02 data
• Revisiting simplified dark matter models in terms of AMS-02 and Fermi-LAT
• Some new hints on cosmic-ray propagation from AMS-02 nuclei spectra
• Simplified dark matter models in the light of AMS-02 antiproton data
• Hybrid origins of the cosmic-ray nuclei spectral hardening at a few hundred GV
• Large-scale anisotropy of Galactic cosmic rays as a probe of local cosmic-ray propagation
• Galactic Centre as an efficient source of cosmic rays
• Data driven analysis of cosmic rays in the heliosphere: diffusion of cosmic protons
• Observation of a time lag in solar modulation of cosmic rays in the heliosphere
• Propagation Times and Energy Losses of Cosmic Protons and Antiprotons in Interplanetary Space
• A forecasting framework for galactic cosmic ray flux in space weather applications
• Galactic Gamma Ray Background from Interactions of Cosmic Rays
• Fresh Insights on Cosmic-ray Propagation from the New AMS Data
• Temporal Correlation between Positive-Charged Cosmic Ray Flux and Solar Polar Field Variation: Insights from Delayed Modulation Analysis
• Quantitative study of the hardening in the Alpha Magnetic Spectrometer nuclei spectra at a few hundred GV
• Multicomponent Dark Matter in the Light of CALET and DAMPE
• New insights from cross-correlation studies between Solar activity and Cosmic-ray fluxes
• Data driven analysis of Galactic cosmic rays in the heliosphere: diffusion of cosmic protons and nuclei
• Combined analyses of the antiproton production from cosmic-ray interactions and its possible dark matter origin
• Study of Galactic interactions and propagation properties of ultrahigh energy cosmic rays using the precision spectrum from the Pierre Auger Observatory
• Constraining the position of the knee in the galactic cosmic ray spectrum with ultra-high-energy diffuse $\gamma$-rays
• Research on electron and positron spectrum in the high-energy region based on the gluon condensation model