Can we explain AMS-02 antiproton and positron excesses simultaneously by nearby supernovae without pulsars nor dark matter?

Abstract

We explain the excess of the antiproton fraction recently reported by the AMS-02 experiment by considering collisions between cosmic-ray protons accelerated by a local supernova remnant (SNR) and the surrounding dense cloud. The same "$pp$-collisions" provide the right ratio of daughter particles to fit the observed positron excess simultaneously in the natural model parameters. The supernova happened in relatively lower metalicity than the major cosmic-ray sources. The cutoff energy of electrons marks the supernova age of $\sim 10^5$ years, while the antiproton excess may extend to higher energy. Both antiproton and positron fluxes are completely consistent with our predictions in Fujita, Kohri, Yamasaki and Ioka (2009).

5 pages, 3 figures, to appear in PTEP

References in corpus (9)

• PYTHIA 6.4 Physics and Manual
• Theory of Star Formation
• Observation of an anomalous positron abundance in the cosmic radiation
• A new measurement of the antiproton-to-proton flux ratio up to 100 GeV in the cosmic radiation
• High-energy antiprotons from old supernova remnants
• Testing astrophysical models for the PAMELA positron excess with cosmic ray nuclei
• New calculation of antiproton production by cosmic ray protons and nuclei
• Theoretical uncertainties in extracting cosmic-ray diffusion parameters: the boron-to-carbon ratio
• Systematic study of the uncertainties in fitting the cosmic positron data by AMS-02

Cited by in corpus (47)

• A Robust Excess in the Cosmic-Ray Antiproton Spectrum: Implications for Annihilating Dark Matter
• Bayesian analysis of spatial-dependent cosmic-ray propagation: astrophysical background of antiprotons and positrons
• Constraining heavy dark matter with cosmic-ray antiprotons
• AMS-02 Antiprotons Reloaded
• Pseudo-Goldstone dark matter confronts cosmic ray and collider anomalies
• Understanding the spectral hardenings and radial distribution of Galactic cosmic rays and Fermi diffuse gamma-rays with spatially-dependent propagation
• Dark matter vs. astrophysics in the interpretation of AMS-02 electron and positron data
• Excesses of Cosmic Ray Spectra from A Single Nearby Source
• Revisit of cosmic ray antiprotons from dark matter annihilation with updated constraints on the background model from AMS-02 and collider data
• Cosmic-Ray Hardenings in the Light of AMS-02
• Constraints on leptophilic dark matter from the AMS-02 experiment
• Investigating the dark matter signal in the cosmic ray antiproton flux with the machine learning method
• Possible Evidence for the Stochastic Acceleration of Secondary Antiprotons by Supernova Remnants
• Antiprotons from dark matter annihilation through light mediators and a possible excess in AMS-02 $\bar{p}/p$ data
• GW150914-like Black Holes as Galactic High-Energy Sources
• Cosmic-Ray Positrons Strongly Constrain Leptophilic Dark Matter
• Interpretations of the cosmic ray secondary-to-primary ratios measured by DAMPE
• Constraining Dark Matter properties with the first generation of stars
• Chiral Dark Sector
• Features in the Spectrum of Cosmic-Ray Positrons from Pulsars
• AMS-02 Positron Excess and Indirect Detection of Three-body Decaying Dark Matter
• Limits on the Dark Matter from AMS-02 antiproton and positron fraction data
• Interpretation of the excess of antiparticles within a modified paradigm of galactic cosmic rays
• Plus Charge Prevalence in Cosmic Rays: Room for Dark Matter in the Positron Spectrum
• Long-range self-interacting dark matter in the Sun
• Cosmic ray $e^{+}{e}^{-}$ spectrum excess and peak feature observed by the DAMPE experiment from dark matter
• Late decaying 2-component dark matter scenario as an explanation of the AMS-02 positron excess
• High Energy Positrons and Gamma Radiation from Decaying Constituents of a two-component Dark Atom Model
• Constraining dark matter annihilation with cosmic ray antiprotons using neural networks
• Cosmic-ray antiprotons in the AMS-02 era: A sensitive probe of dark matter
• Freeze-in production of Fermionic Dark Matter with Pseudo-scalar and Phenomenological Aspects
• Utilizing cosmic-ray positron and electron observations to probe the averaged properties of Milky Way pulsars
• Production and acceleration of antinuclei in supernova shockwaves
• Dark Matter Decaying into Millicharged Particles as a Solution to AMS 02 Positron Excess
• The curious case of high-energy deuterons in Galactic cosmic rays
• Monte Carlo Study of Electron and Positron Cosmic-Ray Propagation with the CALET Spectrum
• $e^{+}$ and $\bar{p}$ production in $pp$ collisions and the cosmic-ray $e^{+}/\bar{p}$ flux ratio
• Revisiting GeV-scale annihilating dark matter with the AMS-02 positron fraction
• Revisiting simplified dark matter models in terms of AMS-02 and Fermi-LAT
• Constraining the Charge-, Time- and Rigidity-Dependence of Cosmic-Ray Solar Modulation with AMS-02 Observations during Solar Cycle 24
• Observing Signals of Spectral Features in the Cosmic-Ray Positrons and Electrons from Milky Way Pulsars
• Consistent explanation for the cosmic-ray positron excess in $p$-wave Breit-Wigner enhanced dark matter annihilation
• Newly-Discovered Anomalies in Galactic Cosmic Rays: Time for Exotic Scenarios?
• Cosmic ray antiprotons and the Single Source model
• Cosmic-Ray Signatures of Dark Matter from a Flavor Dependent Gauge Symmetry Model with Neutrino Mass Mechanism
• Possible counterpart signal of the Fermi bubbles at the cosmic-ray positrons
• Cosmic-ray deuteron excess from a primary component