1,083 research outputs found
Studying the effect of the hadronic phase in nuclear collisions with PYTHIA and UrQMD
In this work, we couple Pb-Pb events simulated with the PYTHIA Angantyr event
generator at and ~TeV with the hadronic cascade
simulator UrQMD to study the effect of the hadronic phase on observables such
as charged-particle multiplicity densities, transverse momentum spectra and
identified particle ratios, giving special emphasis to short-lived resonances.Comment: 4 pages, to appear in proceedings of Strangeness in Quark Matter 201
{\Lambda} polarization from thermalized jet energy
We examine the formation of vortical "smoke rings" as a result of
thermalization of energy lost by a jet. We simulate the formation and evolution
of these rings using hydrodynamics and define an observable that allows to
probe this phenomenon experimentally. We argue that observation of vorticity
associated with jets would be an experimental confirmation of the
thermalization of the energy lost by quenched jets, and also a probe of shear
viscosity.Comment: 8 pages, 7 figure
Measurement of the cosmic ray spectrum above eV using inclined events detected with the Pierre Auger Observatory
A measurement of the cosmic-ray spectrum for energies exceeding
eV is presented, which is based on the analysis of showers
with zenith angles greater than detected with the Pierre Auger
Observatory between 1 January 2004 and 31 December 2013. The measured spectrum
confirms a flux suppression at the highest energies. Above
eV, the "ankle", the flux can be described by a power law with
index followed by
a smooth suppression region. For the energy () at which the
spectral flux has fallen to one-half of its extrapolated value in the absence
of suppression, we find
eV.Comment: Replaced with published version. Added journal reference and DO
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