Antiproton modulation in the Heliosphere and AMS-02 antiproton over proton ratio prediction

Bobik, P.; Boschini, M. J.; Consolandi, C.; Torre, S. Della; Gervasi, M.; Grandi, D.; Kudela, K.; Pensotti, S.; Rancoita, P. G.

doi:doi:10.5194/astra-7-245-2011

Astrophys. Space Sci. Trans., 7, 245-249, 2011
www.astrophys-space-sci-trans.net/7/245/2011/
doi:10.5194/astra-7-245-2011
© Author(s) 2011. This work is distributed
under the Creative Commons Attribution 3.0 License.

Volume 7, issue 3

04 Jul 2011

Antiproton modulation in the Heliosphere and AMS-02 antiproton over proton ratio prediction
P. Bobik¹, M. J. Boschini^2,4, C. Consolandi², S. Della Torre^2,5, M. Gervasi^2,3, D. Grandi², K. Kudela¹, S. Pensotti^2,3, and P. G. Rancoita²
¹Institute of Experimental Physics, Kosice, Slovak Republic
²Istituto Nazionale di Fisica Nucleare, INFN Milano-Bicocca, Milano, Italy
³Department of Physics, University of Milano Bicocca, Milano, Italy
⁴CILEA, Segrate (MI), Italy
⁵Department of Physics and Maths, University of Insubria, Como, Italy

Received: 15 Nov 2010 – Revised: 22 Jan 2011 – Accepted: 30 Jan 2011 – Published: 04 Jul 2011

Abstract. We implemented a quasi time-dependent 2-D stochastic model of solar modulation describing the transport of cosmic rays (CR) in the heliosphere. Our code can modulate the Local Interstellar Spectrum (LIS) of a generic charged particle (light cosmic ions and electrons), calculating the spectrum at 1 AU. Several measurements of CR antiparticles have been performed. Here we focused our attention on the CR antiproton component and the antiproton over proton ratio. We show that our model, using the same heliospheric parameters for both particles, fit the observed p/p ratio. We show a good agreement with BESS-97 and PAMELA data and make a prediction for the AMS-02 experiment.

Citation: Bobik, P., Boschini, M. J., Consolandi, C., Della Torre, S., Gervasi, M., Grandi, D., Kudela, K., Pensotti, S., and Rancoita, P. G.: Antiproton modulation in the Heliosphere and AMS-02 antiproton over proton ratio prediction, Astrophys. Space Sci. Trans., 7, 245-249, doi:10.5194/astra-7-245-2011, 2011.

Astrophysics and Space Sciences Transactions

An Open Access Journal of the Arbeitsgemeinschaft Extraterrestrische Forschung e.V.