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 for Theoretical Physics. https://pirsa.org/13050015

MLA

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

BibTex

          @misc{ scivideos_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 for Theoretical Physics},
            year = {2013},
            month = {may},
            note = {PIRSA:13050015 see, \url{https://scivideos.org/index.php/pirsa/13050015}}
          }
          
Talk numberPIRSA:13050015
Source RepositoryPIRSA

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.