5 research outputs found
Inclusive Jet and Hadron Suppression in a Multi-Stage Approach
We present a new study of jet interactions in the Quark-Gluon Plasma created
in high-energy heavy-ion collisions, using a multi-stage event generator within
the JETSCAPE framework. We focus on medium-induced modifications in the rate of
inclusive jets and high transverse momentum (high-) hadrons.
Scattering-induced jet energy loss is calculated in two stages: A high
virtuality stage based on the MATTER model, in which scattering of highly
virtual partons modifies the vacuum radiation pattern, and a second stage at
lower jet virtuality based on the LBT model, in which leading partons gain and
lose virtuality by scattering and radiation. Coherence effects that reduce the
medium-induced emission rate in the MATTER phase are also included. The
\trento\ model is used for initial conditions, and the (2+1)D VISHNU model is
used for viscous hydrodynamic evolution. Jet interactions with the medium are
modeled via 2-to-2 scattering with Debye screened potentials, in which the
recoiling partons are tracked, hadronized, and included in the jet clustering.
Holes left in the medium are also tracked and subtracted to conserve transverse
momentum. Calculations of the nuclear modification factor ()
for inclusive jets and high- hadrons are compared to
experimental measurements at RHIC and the LHC. Within this framework, we find
that two parameters for energy-loss, the coupling in the medium and the
transition scale between the stages of jet modification, suffice to
successfully describe these data at all energies, for central and semi-central
collisions, without re-scaling the jet transport coefficient .Comment: 33 pages, 23 figure
Multi-scale evolution of charmed particles in a nuclear medium
Parton energy-momentum exchange with the quark gluon plasma (QGP) is a
multi-scale problem. In this work, we calculate the interaction of charm quarks
with the QGP within the higher twist formalism at high virtuality and high
energy using the MATTER model, while the low virtuality and high energy portion
is treated via a (linearized) Boltzmann Transport (LBT) formalism. Coherence
effect that reduces the medium-induced emission rate in the MATTER model is
also taken into account. The interplay between these two formalisms is studied
in detail and used to produce a good description of the D-meson and charged
hadron nuclear modification factor RAA across multiple centralities. All
calculations were carried out utilizing the JETSCAPE framework
Analysis of climatic changes based on indicators of temperature extremes in the Balkan and in the Mediterranean region
Realization of this study is based on research and processing of climatic temperature indicators reflected in materials science in 2008. After receiving the data, processing is done on the basis of deductive logic, based on environmental arguments which are changing due to climate change impacts. Space climate change affects countries and regions around the globe. This overview on the ends of the temperature indicator for Balkan and Mediterranean countries, gives us an opportunity to pass on to deeper studies, because the impact of climate change on physical and biological environment has no borders. The risk of global climate change is becoming increasingly apparent, there is a true need to focus on efforts to limit greenhouse gases and to minimize this issue the impacts on climate change. Lower extremity temperatures ranging up to - 32 0C station Rozaje, Montenegro and high ends of the temperature station Kebili +50 oC
Effects of climatic factors and soil salinity on the distribution of vegetation types containing Anabasis aphylla in Iran: a multivariate factor analysis
Fermilab Test Beam Facility Annual Report: FY19
This Technical Memorandum (TM) summarizes the Fermilab Test Beam Faciltiy (FTBF) operations for FY2019. It is one of a series of annual publications intended to gather information in one place. This TM discusses the experiments performed at the Test Beam from November 2018 to July 2019. The experiments are listed in Table 1. Each experiment wrote a summary that was edited for clarity and is included in this report