Ricap16 6th Roma International Conference on Astroparticle Physics

Session

CR

Jun 23, 2016, 2:30 PM

Roma

218. Cosmic-ray electron+positron spectrum with the Fermi Large Area Telescope

Raffaella Bonino (TO)

6/23/16, 2:30 PM

We present a measurement of the inclusive cosmic-ray electron and positron (CRE) spectrum between 7 GeV and 2 TeV performed with almost seven years of data collected with the Fermi Large Area Telescope. The spectrum above 100 GeV can explore the properties of local CRE sources. Because of the long live time and the very large acceptance of the LAT, our data are the largest CRE sample...

222. Electron and Positron Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International SpaceStation

Dr Henning Gast (I. Physikalisches Institut B, RWTH Aachen)

6/23/16, 2:55 PM

Precision measurements by the Alpha Magnetic Spectrometer on the International Space Station of the primary cosmic-ray electron flux in the range 0.5 to 700 GeV and the positron flux in the range 0.5 to 500 GeV are presented. The electron flux and the positron flux each require a description beyond a single power-law spectrum. Both the electron flux and the positron flux change their behavior...

219. The proton and helium anomalies in the light of the Myriad model

Pierre SALATI (LAPTh and Université Savoie Mont Blanc)

6/23/16, 3:15 PM

A hardening of the proton and helium fluxes is observed above a few hundreds of GeV/nuc. The actual distribution of the local sources of primary cosmic rays has been suggested as a potential solution to this puzzling behavior. Some authors even claim that a single source is responsible for the proton and helium anomalies. But how probable are such explanations ? To answer that question, I will...

223. Antiproton Flux and Antiproton-to-Proton Flux Ration Measured by with the Alpha Magnetic Spectrometer on the International Space Station

Dr Weiwei Xu (Massachusetts Institute of Technology)

6/23/16, 3:40 PM

A precision measurement by AMS of the antiproton flux and the antiproton-to-proton flux ratio in primary cosmic rays in the absolute rigidity range from 1 to 450 GV is presented based on 3.49 × 105 antiproton events and 2.42 × 109 proton events. The antiproton-to-proton flux ratio reaches a maximum at ∼20 GV and is rigidity independent above 60.3 GV

274. Interpretation of the cosmic ray positron and anti--proton fluxes

Paolo Lipari (ROMA1)

6/23/16, 4:05 PM

In this work we discuss possible interpretations ofthe measurements of fluxes of positrons and antiproton in cosmic rays.We underline the interest of studying the ratios of the fluxesfor different particles.It is remarkable that the observed positron/antiproton ratio is consistent with the theoretical expectations (both in the spectral shape and in the relative normalization)of the ratio at...