A new look at the cosmic ray positron fraction M. Boudaud, S. Aupetit, S. Caroff, A. Putze, G. Belanger, Y. Genolini, C. Goy, V. Poireau, V. Poulin, S. Rosier et al. (3 more) A&A, 575 (2015) A67 Published online: 24 February 2015 DOI: 10.1051/0004-6361/201425197