Towards the P-wave nucleon-pion scattering amplitude in the Δ(1232)\Delta (1232) channel

We use lattice QCD and the L\"uscher method to study elastic pion-nucleon scattering in the isospin $I = 3/2$ channel, which couples to the $\Delta(1232)$ resonance. Our $N_f=2+1$ flavor lattice setup features a pion mass of $m_\pi \approx 250$ MeV, such that the strong decay channel $\Delta \rightarrow \pi N$ is close to the threshold. We present our method for constructing the required lattice correlation functions from single- and two-hadron interpolating fields and their projection to irreducible representations of the relevant symmetry group of the lattice. We show preliminary results for the energy spectra in selected moving frames and irreducible representations, and extract the scattering phase shifts. Using a Breit-Wigner fit, we also determine the resonance mass $m_\Delta$ and the $g_{\Delta-\pi N}$ coupling.Comment: 14 pages, 7 figures, Proceedings of the 36th Annual International Symposium on Lattice Field Theory (Lattice 2018), 22-28 July 2018, Michigan State University, East Lansing, Michigan US

Coastal and submarine features on MSS imagery of Southeastern Massachusetts: Comparison with conventional maps

Three ERTS-1, MSS images of southeastern Massachusetts, including Cape Cod Bay, Cape Cod, and Nantucket Sound, show a variety of dynamic geologic and hydrologic phenomena. Coastal features imaged include the coastline at different time in the tidal cycle, harbors, lakes and ponds, marshes (wetlands), and beach and dune areas; submarine features include tidal flats, shoals, dredged and natural channels, and bars. Comparison with conventional maps at 1:1,000,000 and 1:250,000 scales show many inaccuracies between the ERTS imagery and the two map scales. The ERTS-1 imagery can be used to increase the accuracy of these maps, portray additional environmental information, and provide the capability for frequent updating of maps at such scales. ERTS-1 imagery provides a very cost effective method for provision of certain types of environmental data for Cape Cod and environs

Application of ERTS-1 imagery and underflight photography in the detection and monitoring of forest insect infections in the Sierra Nevada Mountains of California

The author has identified the following significant results. Analysis of ERTS-1 imagery with underflight aerial photo support including U-2, in the Sierra Nevada Mountains of California, indicates promising possibilities of detecting and monitoring forest insect outbreaks visually with some mechanical support utilizing the VP-8 image analyzer. Visually, it is possible at a scale of 1:1,000,000 to discriminate between large areas of damaged and undamaged forests; timbered and non-timbered areas; pasture land and cultivated fields; desert and riparian vegetation. At a scale of 1:80,000 it is possible to distinguish among three classes of tree mortality; defoliated and undefoliated areas; non-host mixed conifers; and mountain meadows, rock domes, lakes and glaciers. Machine tests showed significant differences in image densities among various bands and mortality areas

Utilização de radiação Ultravioleta (UV-C) como tecnologia alternativa aos sulfitos para a estabilização microbiológica de vinho tinto:resultados prévios

Neste trabalho avaliou -se o efeito da radiação UV -C sobre a estabilidade microbiológica do vinho tinto e, também, a sua influência sobre alguns parâmetros físico -químicos e sobre o perfil sensorial. Assim, o vinho sem sulfitos foi submetido a radiação UV -C com duas doses diferentes, 778 J.L-1 e 1415 J.L-1, e procedeu -se ainda à preparação de um controlo a que foi adicionado 40 mg.L-1 de dióxido de enxofre. Os vinhos (C, dose 1 e dose 2) foram analisados ao longo do tempo (0, 1, 2, 3, 6 e 9 meses). Os resultados obtidos demonstram que a tecnologia UV -C é eficaz no controlo microbiológico do vinho, não se diferenciando do tratamento tradicional para os parâmetros considerados. No que respeita às características físico -químicas, não se verificou diferenças entre os vários tratamentos para a maioria dos parâmetros analisados. Verifica -se que esta tecnologia tem um efeito muito positivo sobre a estabilidade da cor (intensidade e tonalidade) ao longo do tempo, comparativamente com o vinho com dióxido de enxofre. A análise sensorial revelou que os vinhos submetidos ao tratamento com radiação UV -C apresentaram uma melhor estabilização da cor, contudo verificou -se alguma depreciação no aroma e no sabor dos vinhos, que se atenuou ao longo do tempo.This work consisted in the evaluation of the effect of UV -C radiation on the microbiological stability of red wine as well as its and also its influence on some physical and chemical parameters and on the sensory profile. Thus, wine without sulfites was subjected to UV -C radiation in two different doses, 778 J.L-1 and 1415 J.L-1, and a control sample was also prepared to which 40 mg.L-1 of sulfur dioxide was added. The wines (C dose 1 and dose 2) were analyzed over time (0, 1, 2, 3, 6 and 9 months). The results show that UV -C technology is effective in the microbiological control of wine, without any differences to the standard method for the considered parameters. As for the physical -chemical characteristics, there were no differences between the various treatments for the majority of parameters which were analyzed. It has been verified that this technology has a very positive effect on the stability of the colour (intensity and hue) over time, compared with the wine with sulfur dioxide. The sensory analysis of the wines showed that the wine subjected to treatment with UV -C radiation had better stabilization of colour, but there was some depreciation in the aroma and flavour of the wine, which attenuated over time.info:eu-repo/semantics/publishedVersio

Photocouplings at the Pole from Pion Photoproduction

The reactions $\gamma p\to\pi^0 p$ and $\gamma p\to\pi^+ n$ are analyzed in a semi-phenomenological approach up to $E\sim2.3$ GeV. Fits to differential cross section and single and double polarization observables are performed. A good overall reproduction of the available photoproduction data is achieved. The J\"ulich2012 dynamical coupled-channel model -which describes elastic $\pi N$ scattering and the world data base of the reactions $\pi N\to\eta N$, $K\Lambda$, and $K\Sigma$ at the same time - is employed as the hadronic interaction in the final state. The framework guarantees analyticity and, thus, allows for a reliable extraction of resonance parameters in terms of poles and residues. In particular, the photocouplings at the pole can be extracted and are presented.Comment: 37 pages, 31 figures. Angles of the photocouplings at the pole adapted to the convention of Phys. Rev. C 87, 068201 (2013

Landmark Report (Vol. 5, no. 5)

Newsletter published by the Landmark Association; this local group advocates the preservation, protection and maintenance of architectural, cultural and archaeological resources in Bowling Green and Warren County, Kentucky