$e^{+}$ and $\bar{p}$ production in $pp$ collisions and the cosmic-ray $e^{+}/\bar{p}$ flux ratio

Abstract

Secondary astrophysical production of $e^{+}$ and $\bar{p}$ cosmic rays is considered. Inclusive $\pi$, $K$, and $\bar{p}$ production cross sections in $pp$ collisions at large $\sqrt{s}$ are parametrised using recent experimental data at LHC energies. The astrophysical production rate ratio $Q_{e^{+}}/Q_{\bar{p}}$ is calculated for an input cosmic ray proton flux consistent with local measurements. At $10<E<100$$\sim$GeV the cosmic ray flux ratio $J_{e^{+}}/J_{\bar{p}}$ measured by AMS02 falls below the production rate ratio by about 50\%, while at high energy $E>100$$\sim$GeV the measured flux ratio coincides with the production rate ratio of the secondary source.

9 pages, 8 figures

References in corpus (15)

• PYTHIA 6.4 Physics and Manual
• Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
• Measurements of Strange Particle Production in $p+p$ Collisions at $\sqrt{s}$= 200 GeV
• Parameterization of Gamma, e^+/- and Neutrino Spectra Produced by p-p Interaction in Astronomical Environment
• The origin of the positron excess in cosmic rays
• Measurements of 0.2 to 20 GeV/n cosmic-ray proton and helium spectra from 1997 through 2002 with the BESS spectrometer
• Galactic secondary positron flux at the Earth
• Study of the inclusive production of charged pions, kaons, and protons in pp collisions at sqrt(s) = 0.9, 2.76, and 7 TeV
• High-energy antiprotons from old supernova remnants
• Testing astrophysical models for the PAMELA positron excess with cosmic ray nuclei
• Inhomogeneity in the Supernova Remnant Distribution as the Origin of the PAMELA Anomaly
• Cosmic Ray Antiprotons at High Energies
• Production of Mesons and Baryons at High Rapidity and High Pt in Proton-Proton Collisions at sqrt(s) = 200 GeV
• Interpretation of the cosmic ray positron and antiproton fluxes
• Terrestrial Effects Of Nearby Supernovae In The Early Pleistocene

Cited by in corpus (4)

• A Precision Search for WIMPs with Charged Cosmic Rays
• AAfrag: Interpolation routines for Monte Carlo results on secondary production in proton-proton, proton-nucleus and nucleus-nucleus interactions
• On the Spectrum of Electrons Accelerated in Supernova Remnants
• Nonsecondary origin of cosmic ray positrons