Description
Moderator: Alexandre Kisselev
Panelists: Fernando Arqueros, Henning Gast, Vladimir Solovov
Questions:
1. What is the origin of the GZK-like suppression of the cosmic ray (CR) flux? Is it due to energy loss during propagation or due to reaching maximum energy achievable in a source?
2. Are the data on mass composition of ultra- high energy CRs consistent with a hypothesis that primary particles are 100% proton? Or an admixture of heavy nuclei is also allowed?
3. Does the deficit of muons in LHC-tuned MC simulations mean that current hadronic interaction models must be seriously corrected?
4. Does the anomalous positron fraction (PF) approach a stable asymptotic value or a sharp cutoff at higher energies is possible?
5. Do we observe annihilation of a dark matter or nearby pulsar contribution? Will anisotropy in an arrival direction of CR leptons rule out a dark matter interpretation of PF?
6. Is low-mass WIMP region completely excluded by the data?
