Lattice constraints on the thermal photon rate

We estimate the photon production rate from an SU(3) plasma at temperatures of about 1.1Tc and 1.3Tc. Lattice results for the vector current correlator at spatial momenta k ~ (2-6)T are extrapolated to the continuum limit and analyzed with the help of a polynomial interpolation for the corresponding spectral function, which vanishes at zero frequency and matches to high-precision perturbative results at large invariant masses. For small invariant masses the interpolation is compared with the NLO weak-coupling result, hydrodynamics, and a holographic model. At vanishing invariant mass we extract the photon rate which for k \gsim 3T is found to be close to the NLO weak-coupling prediction. For k \lsim 2T uncertainties remain large but the photon rate is likely to fall below the NLO prediction, in accordance with the onset of a strongly interacting behaviour characteristic of the hydrodynamic regime.Comment: 20 pages. v2: clarifications adde

F-bearing sediments and rocks in the East African Rift: characterization and evaluation of F release capacity

Fluoride represents one of the most severe natural contaminant that affects groundwater as well as rivers and soils. More than 200 million people worldwide consume water with fluoride concentration exceeding the WHO guideline of 1.5 mg L-1 (WHO, 2008)

Music therapy for supporting informal carers of adults with life-threatening illness pre- and post-bereavement; a mixed-methods systematic review

Funding Information: This systematic review is funded by the Music Therapy Charity Scoping Project Competition (UK), grant funding awarded from 2021–2022. The funder had no role in the design of the study, data collection, analysis, and interpretation of data and in writing the manuscript.Peer reviewe

Heavy-flavor production and medium properties in high-energy nuclear collisions --What next?

Open and hidden heavy-flavor physics in high-energy nuclear collisions are entering a new and exciting stage towards reaching a clearer understanding of the new experimental results with the possibility to link them directly to the advancement in lattice Quantum Chromo-Dynamics (QCD). Recent results from experiments and theoretical developments regarding open and hidden heavy-flavor dynamics have been debated at the Lorentz Workshop Tomography of the Quark-Gluon Plasma with Heavy Quarks, which was held in October 2016 in Leiden, The Netherlands. In this contribution, we summarize identified common understandings and developed strategies for the upcoming five years, which aim at achieving a profound knowledge of the dynamical properties of the quark-gluon plasma

QCD and strongly coupled gauge theories : challenges and perspectives

We highlight the progress, current status, and open challenges of QCD-driven physics, in theory and in experiment. We discuss how the strong interaction is intimately connected to a broad sweep of physical problems, in settings ranging from astrophysics and cosmology to strongly coupled, complex systems in particle and condensed-matter physics, as well as to searches for physics beyond the Standard Model. We also discuss how success in describing the strong interaction impacts other fields, and, in turn, how such subjects can impact studies of the strong interaction. In the course of the work we offer a perspective on the many research streams which flow into and out of QCD, as well as a vision for future developments.Peer reviewe

Desensitization of the D1 dopamine receptors in rats reproduces a model of escape deficit reverted by imipramine

The present study investigated the effect of long-term D1 dopamine receptor stimulation on an animal model of depression derived from the learned helplessness paradigm. 2. The model used is based on the escape deficit produced by a series of unavoidable shocks administered to rats 24 h before the test session. SKF 38393 administered acutely, completely prevented the development of animal hyporeactivity, while given repeatedly produced tolerance to its own protective effect. Moreover it also reduced the spontaneous escape reactivity of rats not exposed to the inescapable shocks. Animals chronically receiving SKF 38393 and showing a clearcut escape deficit, were treated daily with either imipramine, fluoxetine, or clomipramine. After 21 days of combined treatment the 3 antidepressants appeared equally effective in reverting the behavioral deficit. Moreover, long term administration of both imipramine or SKF 38393 down regulated D1 dopamine receptor number in the prefrontal cortex, while the association of the two drugs resulted in a receptor density similar to that of control rats. 3. The present results further support the crucial role played by D1 dopamine receptors in the control of animal reactivity to stressful stimuli and in the mechanism of action of imipramine. Moreover they show that the D1 dopamine receptor related escape deficit is sensitive also to compounds selectively acting through the serotonergic neuronal system