Speaker
Prof.
Hongbo Hu
(IHEP)
Description
The standard model of cosmic ray propagation has been very successful in explaining all kinds of the
Galactic cosmic ray spectra. However, high precision
measurement recently revealed the appreciable discrepancy between data and model expectation,
from spectrum observations of $\gamma$-rays, $e^+/e^-$ and probably the $B/C$ ratio starting from $\sim$10 GeV energy.
In this work, we propose that the fresh cosmic rays, which are supplied by the young accelerators
and detained by local magnetic field,
can contribute additional secondary particles interacting with local materials.
As this early cosmic ray has a hard
spectrum, the model calculation results in a two-component $\gamma$-ray spectrum,
which agree very well with the observation.
Simultaneously, the expected neutrino number from the galactic plane could
contribute $\sim60\%$ of IceCube observed neutrino number below a few hundreds of TeV.
The same pp-collision process can account for a significant amount of the positron excesses.
Under this model, it is expected that the excesses in $\overline p/p$ and $B/C$ ratio
will show up when energy is above $\sim$10 GeV.
We look forward that the model will be tested in the near future by
new observations from AMS02, IceCube, AS$\gamma$, HAWC and future experiments such
as LHASSO, HiSCORE and CTA.
| Registration number following "ICRC2015-I/" | 263 |
|---|---|
| Collaboration | ARGO-YBJ |
Author
Dr
Yiqing Guo
(IHEP)
