13,136 research outputs found
Capacity of Sum-networks for Different Message Alphabets
A sum-network is a directed acyclic network in which all terminal nodes
demand the `sum' of the independent information observed at the source nodes.
Many characteristics of the well-studied multiple-unicast network communication
problem also hold for sum-networks due to a known reduction between instances
of these two problems. Our main result is that unlike a multiple unicast
network, the coding capacity of a sum-network is dependent on the message
alphabet. We demonstrate this using a construction procedure and show that the
choice of a message alphabet can reduce the coding capacity of a sum-network
from to close to
Energy dependence of (1020) production at mid-rapidity in pp collisions with ALICE at the LHC
Hadronic resonances are unique tools to investigate the interplay of
re-scattering and regeneration effects during the hadronization phase in
heavy-ion collisions. Measurements in small collision systems provide a
necessary baseline for heavy-ion data, help to tune pQCD inspired event
generators and give insight into the search for the onset of collective
effects. As the meson has a longer lifetime compared to other
resonances, it is expected that its production would be much less affected by
regeneration and re-scattering processes. We report on measurements of
meson production in minimum bias pp collisions at different beam energies and
as a function of charged particle multiplicity with the ALICE detector at the
LHC. The results include the transverse momentum
distributions of as well as the particle yield ratios. Finally, we have
also studied the effective strangeness content by comparing our results
to theoretical calculations.Comment: 3 pages, 2 figures, Presented in XXVIIth International Conference on
Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter 2018
- …