9,102 research outputs found
Overview and Recent Results from BRAHMS
The BRAHMS experiment was designed to measure and characterize in particular
the properties of rapidity dependence of particle production in heavy ion
collisions. The data-taking is now over, results of several years of analysis
have been published and demonstrates several important features of the rapidity
dependence, not envisioned from the start of the RHIC program. The bulk
properties of the system formed at high rapidity resemble that of systems at
lower energies at mid-rapidity when referenced via the baryo-chemical
potential. New physics in AA are essentially observed at mid-rapidity including
the demonstration that high-\pT suppression is a final state effect. Another
key result is that in d+A collisions at forward rapidities where the very low-x
region of the nucleus was probed, a strong suppression of pion production was
observed consistent with the picture of gluon saturation. The latest results
examines the centrality and rapidity dependence of nuclear stopping, the
particle production of pions, collective expansion vs. rapidity, and the baryon
enhancement at intermediate values of \pT .Comment: 8 pages, 6 figures - To appear in the conference proceedings for
Quark Matter 2009, March 30 - April 4, Knoxville, Tennessee Fixed typos and
minor text issues as per organizers review reques
Dynamics of Particle Production in Relativistic Nuclear Collisions
Saturation models for particle production in relativistic nuclear collisions
are discussed. In particular, I show that the predictions from the high density
QCD for the qualitative shape of are very sensitive to the form of the
unintegrated gluon distribution.Comment: 4 pages, 4 figures, Proceedings for Quark Matter 200
Recommended from our members
The many roads to psychosis: recent advances in understanding risk and mechanisms.
Schizophrenia is a chronic and severe mental illness which frequently leads to substantial lifelong disability. The past five years have seen major progress in our understanding of the complex genetic architecture of this disorder. Two major barriers to understanding the core biological processes that underlie schizophrenia and developing better interventions are (1) the absence of etiologically defined biomarkers and (2) the clinical and genetic heterogeneity of the disorder. Here, we review recent advances that have led to changes in our understanding of risk factors and mechanisms involved in the development of schizophrenia. In particular, mechanistic and clinically oriented approaches have now converged on a focus on disruptions in early neurodevelopment and synaptic plasticity as being critical for both understanding trajectories and intervening to change them. Translating these new findings into treatments that substantively change the lives of patients is the next major challenge for the field
Non-degree Recital: Ruth Bearden, flute and piccolo
This recital is presented in partial fulfillment of requirements for the degree Minor in Music. Ms. Bearden studies flute with Cecilia Price.https://digitalcommons.kennesaw.edu/musicprograms/2140/thumbnail.jp
On positivity and roots in operator algebras
In earlier papers the second author and Charles Read have introduced and
studied a new notion of positivity for operator algebras, with an eye to
extending certain C*-algebraic results and theories to more general algebras.
The present paper consists of complements to some facts in the just mentioned
papers, concerning this notion of positivity. For example we prove a result on
the numerical range of products of the roots of commuting operators with
numerical range in a sector.Comment: 11 pages, to appear Integral Equations Operator Theor
Neutral Kaon System in Dense Matter and Heavy-Ion Collisions
Above a critical matter density the propagating modes of the neutral kaon
system are essentially eigenstates of strangeness, but below it they are almost
complete eigenstates of CP. We estimate the real and imaginary parts of the
energies of these modes and their mixing at all densities up to nuclear matter
density g/cm. In a heavy ion collision the strong
interactions create eigenstates of strangeness, and these propagate
adiabatically until the density has fallen to the critical value, whereupon the
system undergoes a sudden transition to (near) eigenstates of CP. We estimate
the critical density to be 20 g/cm, and that this density will be reached
about fm/c after the end of the collision.Comment: 9 page
An axiomatic developement of the ideas underlying Darwinian natural selection
Imperial Users onl
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