Massive and Massless Scalar Field and Confinement

Generalization of QCD motivated classical SU(2) Yang--Mills theory coupled to the scalar field is discussed. The massive scalar field, corresponding the scalar glueball, provides a confining potential for static, point-like, external sources. In case of massless scalar field screening solutions are found. However, there is a confining sector as well. Both, massive and massless confining solutions are compared with phenomenological potentials. The case of non-dynamical permittivity is also discussed.Comment: 10 pages, LaTeX, Accepted for publication in Eur. Phys. J.

Quark-antiquark potentials from a scalar field in SU(2) YM

A generalized Dick model with a potential term is discussed. The solution originating from a static, pointlike, color source is found to have a confining part. The comparison with a wide spectrum of phenomenological quark-antiquark potentials is presented.Comment: 6 pages, LaTeX; to appear in Eur. Phys. J.

Economic and Financial Situation of Furniture Removal Services (H4923.04) and Bridge and Viaduct Construction (F4210.32) Enterprises

The primary objective of this investigative work was to determine among the ISICs analyzed – the furniture removal services (H4923.04) and construction of bridges and viaducts (F4210.32), both of which maintain good operation and management – the ISIC that has better economic operation than the other. Bibliographic materials and calculations were studied, and a quantitative approach based on a deductive scheme was applied. Data were analyzed using the Microsoft Excel sheet. It was found that Ciiu 1: H4923.04 – FURNITURE MOVING SERVICES – has had a better economic standing in its operation compared to Ciiu 2 F4210.32 – CONSTRUCTION OF BRIDGES AND VIADUCTS – that presents values at 0 in its financial ratios, that is to say, its financial performance is not positive. The means obtained from each financial ratio were analyzed together with the coefficient of variation which showed that the data tend to be more dispersed in Ciiu 1: H4923.04 – FURNITURE MOVING SERVICES – since Ciiu 2 did not present data. Therefore, to conclude, it was possible to obtain the means of each of the ISICs in question in order to obtain a comparison between the two and to know the benefits they have obtained in the years 2018 and 2019. Keywords: ciiu, financial analysis, means, variation coefficient. Resumen El presente trabajo investigativo tuvo como objetivo principal determinar entre los CIIU analizados servicios de mudanzas de muebles (H4923.04) y construcción de puentes y viaductos (F4210.32) cual ha tenido una buena situación económica en su ejercicio con el fin de determinar que CIIU ha tenido mejores operaciones en su ejercicio, se utilizó para el desarrollo del trabajo materiales bibliográficos y materiales de calculo que nos sirvieron para realizar el estudio respectivo, el método de enfoque aplicado a esta investigación es cuantitativo, el método se basa en un esquema deductivo y lógico, después de haber tenido el marco metodológico se pasó al análisis de resultados realizados en Excel y obtuvimos que el Ciiu 1 :H4923.04 - SERVICIOS DE MUDANZAS DE MUEBLES ha tenido una mejor situación económica en su ejercicio en comparación al Ciiu 2 F4210.32 - CONSTRUCCIÓN DE PUENTES Y VIADUCTOS que presenta valores en 0 en sus ratios financieros es decir que su desenvolvimiento financiero no es positivo, en la discusión se analizaron las medias obtenidas de cada ratio financiero junto con el coeficiente de variación y nos mostró que los datos tienden a ser más dispersos en el Ciiu 1: H4923.04 - SERVICIOS DE MUDANZAS DE MUEBLES ya que en el ciiu 2 no presentan datos, como conclusión obtuvimos que se pudo llegar a conseguir las medias de cada uno de los CIIU en cuestión para así poder obtener una comparación entre ambos y conocer cuáles son los beneficios que han obtenido en los años 2018 y 2019. Palabras Clave: ciiu, análisis financiero, medias, coeficiente de variació

Unconventional cosmology on the (thick) brane

We consider the cosmology of a thick codimension 1 brane. We obtain the matching conditions leading to the cosmological evolution equations and show that when one includes matter with a pressure component along the extra dimension in the brane energy-momentum tensor, the cosmology is of non-standard type. In particular one can get acceleration when a dust of non-relativistic matter particles is the only source for the (modified) Friedman equation. Our equations would seem to violate the conservation of energy-momentum from a 4D perspective, but in 5D the energy-momentum is conserved. One could write down an effective conserved 4D energy-momentum tensor attaching a ``dark energy'' component to the energy-momentum tensor of matter that has pressure along the extra dimension. This extra component could, on a cosmological scale, be interpreted as matter-coupled quintessence. We comment on the effective 4D description of this effect in terms of the time evolution of a scalar field (the 5D radion) coupled to this kind of matter.Comment: 9 pages, v2. eq.(17) corrected, comments on effective theory change