35,840 research outputs found
Jet quenching measurements with ATLAS at LHC
A broad program of measurements is planned for heavy ion collisions in ATLAS.
With up to a factor of 30 increase in collision energy compared to existing
data, significant new insights are anticipated to be obtained with the first
data measured. Global features of the LHC collisions will be accessible with
the early data and will set the stage for the precision measurements to follow.
ATLAS is particularly well suited for exploration of "jet quenching," the
extinction of energetic jets in the hot dense medium. Observations of heavy
quark jet suppression will be possible with unprecedented energy reach and
statistical precision, potentially yielding new insights into the basic
mechanisms involved.Comment: 5 pages, 3 figure
J/{\Psi} and {\Psi}(2S) Production in p-Pb Collisions at 5.02 TeV with ATLAS
The production rates of heavy quarkonia in ion-ion collisions provide
sensitive probes in the studies of the hot and dense matter formed in these
collisions at high energies. However, a reference for understanding the
behavior in the hot medium is necessary; p-A collisions open the possibility to
study heavy quarkonia states in a smaller system of much lower average
temperature. This is an important step in forming a baseline for understanding
A-A collisions, as well as an investigation into the nature of modifications of
the parton distributions in the nucleus. Using data collected at the LHC in
2013, we show results on the prompt J/{\Psi} and {\Psi}(2S) nuclear
modification factors and the double ratio, {\Psi}(2S) divided by J/{\Psi} in
p-Pb divided by the same in p-p, in p-Pb collisions at 5.02 TeV. The charmonia
states were reconstructed via the dimuon decay channel and the yield is
analyzed differentially in bins of transverse momentum, rapidity, and event
activity.Comment: Proceedings contribution for the HARD PROBES 2015 Conference at
McGill University in Montreal, June 29 - July 3, 2015. Four pages. To be
published in Nuclear Physics B Proceedings Supplemen
Propagation of QCD Color through Strongly Interacting Systems
The propagation of QCD color through atomic nuclei is studied via a new
analysis using a geometric model of semi-inclusive deep inelastic scattering.
The experimental data were previously published by the HERMES Collaboration and
consisted of the multiplicity ratio observable (2007) and the transverse
momentum broadening observable (2010). We perform a simultaneous fit of these
two observables to estimate (1) the color lifetime of the quark, (2) quark
energy loss, (3) the transport coefficient, and (4) the cross section
for hadronic interaction with the medium. We present preliminary results for
this fit.Comment: 4 pages, 3 figures; proceedings for the Eighth International
Conference on Quarks and Nuclear Physics (QNP2018), Tsukuba, Japan.
https://www-conf.kek.jp/qnp2018
Building on the cultural and linguistic capital of English learner (EL) students
Approaches and strategies that value and build upon the cultural and linguistic capital of English learner students are described. Through implementing such strategies, teachers can impress upon students and families that multiculturalism and multilingualism are highly beneficial to the classroom, school, and community
A Census of the Carina Nebula -- II. Energy Budget and Global Properties of the Nebulosity
The first paper in this series took a direct census of energy input from the
known OB stars in the Carina Nebula, and in this paper we study the global
properties of the surrounding nebulosity. We find that the total IR luminosity
of Carina is about 1.2E7 Lsun, accounting for only about 50-60% of the known
stellar luminosity from Paper I. Similarly, the ionizing photon luminosity --
(abridged; many important details omitted). Synchronized star formation around
the periphery of Carina provides a strong case that star formation here was
indeed triggered by stellar winds and UV radiation. This second generation
appears to involve a cascade toward preferentially intermediate- and low-mass
stars, but this may soon change when eta Car and its siblings explode. If the
current reservoir of atomic and molecular gas can be tapped at that time,
massive star formation may be rejuvinated around the periphery of Carina much
as if it were a young version of Gould's Belt. Also, when these multiple SNe
occur, the triggered second generation will be pelted repeatedly with SN ejecta
bearing short-lived radioactive nuclides. Carina may therefore represent the
most observable analog to the cradle of our own Solar System.Comment: MNRAS accepted, 14 pages, fig 1 in colo
Why the "Struggling Reader" label Is harmful (and what educators can do about it)
The authors featured in this department column share instructional practices that support transformative literacy teaching and disrupt “struggling reader” and “struggling writer” labels.Accepted manuscrip
Systematic Review of Physiotherapy during Acute Exacerbations of Chronic Obstructive Pulmonary Disease (AECOPD)
In COPD patients, acute exacerbations are important events. Reviews of studies investigating treatment during AECOPD focus on medical management, with little discussion of physiotherapy. Therefore a systematic review was undertaken of the studies pertaining to physiotherapy during AECOPD. Methods: Studies were identified by searching databases and scanning reference lists. Appropriate studies were reviewed by two independent investigators. Data were extracted using a standardized form. Where possible, a score was assigned using the PEDro scale for assessment of study quality.
HIll, K., Patman, S., & Brooks, D. (2008). Systematic review of physiotherapy during Acute Exacerbations of Chronic Obstructive Pulmonary Disease (AECOPD). American Journal of Respiratory and Critical Care Medicine, 177, Abstracts Issue, A137.
ISSN: 1073-449
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