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.

Antiprotons and Elementary Particles over a Solar Cycle: Results from the Alpha Magnetic Spectrometer / Aguilar, M., Ambrosi, G., Anderson, H., Arruda, L., Attig, N., Bagwell, C., Barao, F., Barbanera, M., Barrin, L., Bartoloni, A., Battiston, R., Bayyari, A., Belyaev, N., Bertucci, B., Bindi, V., Bollweg, K., Bolster, J., Borchiellini, M., Borgia, B., Boschini, M. J., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 134:5(2025). [10.1103/physrevlett.134.051002]

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

Battiston, R.;Burger, J.;Dass, A.;Dimiccoli, F.;Lazzizzera, I.;Nicolaidis, R.;Nozzoli, F.;Rossi, F.;Zuccon, P.;
2025-01-01

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.
2025
5
Aguilar, M.; Ambrosi, G.; Anderson, H.; Arruda, L.; Attig, N.; Bagwell, C.; Barao, F.; Barbanera, M.; Barrin, L.; Bartoloni, A.; Battiston, R.; Bayyar...espandi
Antiprotons and Elementary Particles over a Solar Cycle: Results from the Alpha Magnetic Spectrometer / Aguilar, M., Ambrosi, G., Anderson, H., Arruda, L., Attig, N., Bagwell, C., Barao, F., Barbanera, M., Barrin, L., Bartoloni, A., Battiston, R., Bayyari, A., Belyaev, N., Bertucci, B., Bindi, V., Bollweg, K., Bolster, J., Borchiellini, M., Borgia, B., Boschini, M. J., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 134:5(2025). [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/11572/449274
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