We present results over an 11-year Solar cycle of cosmic antiprotons based on 1.1×106 events in the rigidity range from 1.00 to 41.9 GV. The p¯ fluxes exhibit distinct properties. The magnitude of the p¯ flux temporal variation is significantly smaller than those of p, e-, and e+. A hysteresis between the p¯ fluxes and the p fluxes is observed, whereas the p¯ and e- fluxes show a linear correlation. With a model-independent analysis, we found a universal relation between the shape of the rigidity spectrum and the magnitude of flux temporal variation over an 11-year Solar cycle for both positively and negatively charged particles. The simultaneous results on p¯ and p, e-, and e+ provide unique information for understanding particle transport in the Solar System as a function of mass, charge, and spectral shape.

Aguilar, M., Ambrosi, G., Anderson, H., Arruda, L., Attig, N., Bagwell, C., et al. (2025). Antiprotons and Elementary Particles over a Solar Cycle: Results from the Alpha Magnetic Spectrometer. PHYSICAL REVIEW LETTERS, 134(5) [10.1103/physrevlett.134.051002].

Antiprotons and Elementary Particles over a Solar Cycle: Results from the Alpha Magnetic Spectrometer

Consolandi, C.;Gervasi, M.;Grandi, D.;La Vacca, G.;Pensotti, S.;Rozza, D.;Tacconi, M.;
2025

Abstract

We present results over an 11-year Solar cycle of cosmic antiprotons based on 1.1×106 events in the rigidity range from 1.00 to 41.9 GV. The p¯ fluxes exhibit distinct properties. The magnitude of the p¯ flux temporal variation is significantly smaller than those of p, e-, and e+. A hysteresis between the p¯ fluxes and the p fluxes is observed, whereas the p¯ and e- fluxes show a linear correlation. With a model-independent analysis, we found a universal relation between the shape of the rigidity spectrum and the magnitude of flux temporal variation over an 11-year Solar cycle for both positively and negatively charged particles. The simultaneous results on p¯ and p, e-, and e+ provide unique information for understanding particle transport in the Solar System as a function of mass, charge, and spectral shape.
Articolo in rivista - Articolo scientifico
Cosmic Rays, Antiprotons, solar modulation, International Space Station
English
3-feb-2025
2025
134
5
051002
open
Aguilar, M., Ambrosi, G., Anderson, H., Arruda, L., Attig, N., Bagwell, C., et al. (2025). Antiprotons and Elementary Particles over a Solar Cycle: Results from the Alpha Magnetic Spectrometer. PHYSICAL REVIEW LETTERS, 134(5) [10.1103/physrevlett.134.051002].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/539066
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