84 research outputs found
System Size and Energy Dependence of Jet-Induced Hadron Pair Correlation Shapes in Cu+Cu and Au+Au Collisions at sqrt(s_NN) = 200 and 62.4 GeV
We present azimuthal angle correlations of intermediate transverse momentum
(1-4 GeV/c) hadrons from {dijets} in Cu+Cu and Au+Au collisions at sqrt(s_NN) =
62.4 and 200 GeV. The away-side dijet induced azimuthal correlation is
broadened, non-Gaussian, and peaked away from \Delta\phi=\pi in central and
semi-central collisions in all the systems. The broadening and peak location
are found to depend upon the number of participants in the collision, but not
on the collision energy or beam nuclei. These results are consistent with sound
or shock wave models, but pose challenges to Cherenkov gluon radiation models.Comment: 464 authors from 60 institutions, 6 pages, 3 figures, 2 tables.
Submitted to Physical Review Letters. Plain text data tables for the points
plotted in figures for this and previous PHENIX publications are (or will be)
publicly available at http://www.phenix.bnl.gov/papers.htm
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Measurement of Bottom versus Charm as a Function of Transverse Momentum with Electron-Hadron Correlations in p+p Collisions at sqrt(s)=200 GeV
The momentum distribution of electrons from semi-leptonic decays of charm and
bottom for mid-rapidity |y|<0.35 in p+p collisions at sqrt(s)=200 GeV is
measured by the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC)
over the transverse momentum range 2 < p_T < 7 GeV/c. The ratio of the yield of
electrons from bottom to that from charm is presented. The ratio is determined
using partial D/D^bar --> e^{+/-} K^{-/+} X (K unidentified) reconstruction. It
is found that the yield of electrons from bottom becomes significant above 4
GeV/c in p_T. A fixed-order-plus-next-to-leading-log (FONLL) perturbative
quantum chromodynamics (pQCD) calculation agrees with the data within the
theoretical and experimental uncertainties. The extracted total bottom
production cross section at this energy is \sigma_{b\b^bar}= 3.2
^{+1.2}_{-1.1}(stat) ^{+1.4}_{-1.3}(syst) micro b.Comment: 432 authors, 6 pages text, 3 figures. Submitted to Phys. Rev. Lett.
Plain text data tables for the points plotted in figures for this and
previous PHENIX publications are (or will be) publicly available at
http://www.phenix.bnl.gov/papers.htm
Presuming the Status Quo? The Impact of the Statutory Presumption of Parental Involvement
The courts’ treatment of domestic abuse within private law child arrangements disputes has attracted significant concern for many years, most recently culminating in the call for major reform by the Ministry of Justice’s expert review into the courts’ practice. The Ministry of Justice has since committed to a follow-up review into the operation of the statutory presumption of parental involvement (Children Act 1989, section 1(2A)). This paper provides timely insight into the impact of this presumption in cases involving domestic abuse, presenting the findings from the first empirical study to explore its impact on the lower courts. Forty-one semi-structured interviews were conducted with judges, barristers, solicitors, Cafcass practitioners and representatives from domestic abuse organisations. It also explores perceptions of whether the statutory presumption ought to be reversed to introduce a presumption against contact in domestic abuse cases. It is argued that whilst the statutory presumption does not appear to be changing the courts’ practice, its harm lies in the reinforcement of a dominant narrative that children ‘need’ contact. Whilst a presumption against contact might not hold the answer to changing this narrative, there remains an urgent need to reappraise the approach taken to the resolution of cases involving domestic abuse
Ecological restoration as a real-world experiment: designing robust implementation strategies in an urban environment
Contraction of the sheep middle cerebral, pulmonary and coronary arteries initiated by release of intracellular calcium
“That's Where the Arguments Come in”: A Qualitative Analysis of Booster Sessions following a Brief Intervention for Drug Use and Intimate Partner Violence in the Emergency Department
A comparative evaluation of cimetidine and sodium citrate to decrease gastric acidity: Effectiveness at the time of induction of anaesthesia
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