20,550 research outputs found
Gluino production in ultrarelativistic heavy ion collisions and nuclear shadowing
In this article we investigate the influence of nuclear effects in the
production of gluinos in nuclear collisions at the LHC, and estimate the
transverse momentum dependence of the nuclear ratios and . We
demonstrate that depending on the magnitude of the nuclear effects, the
production of gluinos could be enhanced, compared to proton-proton collisions.
The study of these observables can be useful to determine the magnitude of the
shadowing and antishadowing effects in the nuclear gluon distribution.
Moreover, we test different SPS scenarios, corresponding to different soft SUSY
breaking mechanisms, and find that the nuclear ratios are strongly dependent on
that choice.Comment: 7 pages, 5 figures; results and discussions changed/added. Accepted
for publication in Physical Review
Soft and hard QCD dynamics in hadroproduction of charmonium
Both hard and soft QCD dynamics are important in charmonium production, as
presented here through a next-to-leading order QCD matrix element calculation
combined with the colour evaporation model. Observed and
distributions of in hadroproduction at fixed target and
collider energies are reproduced. Quite similar results can also be obtained in
a more phenomenologically useful Monte Carlo event generator where the
perturbative production of \ccbar pairs is instead obtained through leading
order matrix elements and the parton shower approximation of the higher order
processes. The soft dynamics may alternatively be described by the soft colour
interaction model, originally introduced in connection with rapidity gaps. We
also discuss the relative rates of different charmonium states and introduce an
improved model for mapping the continuous \ccbar mass spectrum on the physical
charmonium resonances.Comment: 21 pages, 13 eps figure
Soft and hard QCD in charmonium production
Hard and soft QCD dynamics are both important in charmonium hadroproduction,
as presented here through a next-to-leading order QCD matrix element
calculation combined with the colour evaporation model. Observed and
distributions of in hadroproduction are reproduced. Quite
similar results can also be obtained with a Monte Carlo event generator where
\ccbar pairs are instead produced through leading order matrix elements and the
parton shower approximation of higher order processes. The soft dynamics may
alternatively be described by the soft colour interaction model. We also
discuss the relative rates of different charmonium states and introduce an
improved model for mapping the continuous ccbar mass spectrum on the physical
charmonium resonances.Comment: Presented at Pan American Advanced Studies Institute (PASI 2002),
Campos do Jord\~ao, Brazil, January 7-18, 200
Separation of suspended particles by arrays of obstacles in microfluidic devices
The stochastic transport of suspended particles through a periodic pattern of
obstacles in microfluidic devices is investigated by means of the Fokker-Planck
equation. Asymmetric arrays of obstacles have been shown to induce the
continuous separation of DNA molecules of different length. The analysis
presented here of the asymptotic distribution of particles in a unit cell of
these systems shows that separation is only possible in the presence of a
driving force with a non-vanishing normal component at the surface of the solid
obstacles. In addition, vector separation, in which different species move, in
average, in different directions within the device, is driven by differences on
the force acting on the various particles and not by differences in the
diffusion coefficient. Monte-Carlo simulations performed for different
particles and force fields agree with the numerical solutions of the
Fokker-Planck equation in the periodic system
The Core of Care Management: The Role of Authentic Relationships in Caring for Patients with Frequent Hospitalizations.
In the movement to improve the health of patients with multiple chronic conditions and vulnerabilities, while reducing the need for hospitalizations, care management programs have garnered wide attention and support. The qualitative data presented in this paper sheds new light on key components of successful chronic care management programs. By going beyond a task- and temporal-based framework, this analysis identifies and defines the importance of authentic healing relationships in driving individual and systemic change. Drawing on the voices of 30 former clients of the Camden Coalition of Healthcare Providers, the investigators use qualitative methods to identify and elaborate the core elements of the authentic healing relationship-security, genuineness, and continuity-a relationship that is linked to patient motivation and active health management. Although not readily found in the traditional health care delivery system, these authentic healing relationships present significant implications for addressing the persistent health-related needs of patients with frequent hospitalizations. (Population Health Management 2016;19:248-256)
College Readiness Initiative: AVID and Navigation 101
The purpose of this report is to provide summative feedback to personnel at the Office of Superintendent of Public Instruction (OSPI) and at the College Spark Washington regarding evidence of implementation and impact of the Advancement via Individual Determination (AVID) and Navigation 101 programs in schools funded by the College Readiness Initiative (CRI) in Washington State. The report, while addressing the effects of both programs, is also designed to provide formative feedback to assist in ongoing program development
- …