PIRSA:13050015

AMS02 results support the secondary origin of cosmic ray positrons

APA

Blum, K. (2013). AMS02 results support the secondary origin of cosmic ray positrons. Perimeter Institute. https://pirsa.org/13050015

MLA

Blum, Kfir. AMS02 results support the secondary origin of cosmic ray positrons. Perimeter Institute, May. 03, 2013, https://pirsa.org/13050015

BibTex

          @misc{ pirsa_13050015,
            doi = {10.48660/13050015},
            url = {https://pirsa.org/13050015},
            author = {Blum, Kfir},
            keywords = {Particle Physics},
            language = {en},
            title = {AMS02 results support the secondary origin of cosmic ray positrons},
            publisher = {Perimeter Institute},
            year = {2013},
            month = {may},
            note = {PIRSA:13050015 see, \url{https://pirsa.org}}
          }
          

Abstract

We show that the recent AMS02 positron fraction measurement is perfectly consistent with a secondary origin for positrons, and does not require additional primary sources such as pulsars or dark matter. Within the secondary model the AMS02 data imply a cosmic ray propagation time in the
Galaxy of about one Myr and an average traversed interstellar matter density of about 1/cc at a rigidity of 300 GV. These results may hint that high energy cosmic rays are confined to a thin halo of scale height similar to the gaseous disk.