A hadronic explanation of the lepton anomaly
Research output: Contribution to journal › Journal article › Research › peer-review
Standard
A hadronic explanation of the lepton anomaly. / Mertsch, Philipp; Sarkar, Subir.
In: Journal of Physics - Conference Series, Vol. 531, No. 1, 012008, 01.01.2014.Research output: Contribution to journal › Journal article › Research › peer-review
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - A hadronic explanation of the lepton anomaly
AU - Mertsch, Philipp
AU - Sarkar, Subir
PY - 2014/1/1
Y1 - 2014/1/1
N2 - The rise in the positron fraction, observed by PAMELA, Fermi-LAT and mostrecently by AMS-02, has created a lot of interest, fuelled by speculations about an origin in dark matter annihilation in the Galactic halo. However, other channels, e.g. antiprotons or gamma-rays, now severely constrain dark matter interpretations, thus requiring astrophysical sources of positrons. We have investigated the possibility that supernova remnants, the most likely sources of Galactic cosmic rays, can in fact also produce a hard spectrum of secondary positrons, by spallation and acceleration at the shock. This mechanism is guaranteed if hadronic CRs are present and would also lead to observable signatures in other secondary channels like the boron-to-carbon or antiproton-to-proton ratios. If such features were borne out by upcoming AMS-02 data, this would rule out other explanations.
AB - The rise in the positron fraction, observed by PAMELA, Fermi-LAT and mostrecently by AMS-02, has created a lot of interest, fuelled by speculations about an origin in dark matter annihilation in the Galactic halo. However, other channels, e.g. antiprotons or gamma-rays, now severely constrain dark matter interpretations, thus requiring astrophysical sources of positrons. We have investigated the possibility that supernova remnants, the most likely sources of Galactic cosmic rays, can in fact also produce a hard spectrum of secondary positrons, by spallation and acceleration at the shock. This mechanism is guaranteed if hadronic CRs are present and would also lead to observable signatures in other secondary channels like the boron-to-carbon or antiproton-to-proton ratios. If such features were borne out by upcoming AMS-02 data, this would rule out other explanations.
U2 - 10.1088/1742-6596/531/1/012008
DO - 10.1088/1742-6596/531/1/012008
M3 - Journal article
VL - 531
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012008
ER -
ID: 129923973