The BES f_0(1810): a new glueball candidate

We analyze the f_0(1810) state recently observed by the BES collaboration via radiative J/\psi decay to a resonant \phi\omega spectrum and confront it with DM2 data and glueball theory. The DM2 group only measured \omega\omega decays and reported a pseudoscalar but no scalar resonance in this mass region. A rescattering mechanism from the open flavored KKbar decay channel is considered to explain why the resonance is only seen in the flavor asymmetric \omega\phi branch along with a discussion of positive C parity charmonia decays to strengthen the case for preferred open flavor glueball decays. We also calculate the total glueball decay width to be roughly 100 MeV, in agreement with the narrow, newly found f_0, and smaller than the expected estimate of 200-400 MeV. We conclude that this discovered scalar hadron is a solid glueball candidate and deserves further experimental investigation, especially in the K-Kbar channel. Finally we comment on other, but less likely, possible assignments for this state.Comment: 11 pages, 4 figures. Major substantive additions, including an ab-initio, QCD-based computation of the glueball inclusive decay width, evaluation of final state effects, and enhanced discussion of several alternative possibilities. Our conclusions are unchanged: the BES f_0(1810) is a promising glueball candidat

A biphotons double slit experiment

In this paper we present a double slit experiment where two undistinguishable photons produced by type I PDC are sent each to a well defined slit. Data about the diffraction and interference patterns for coincidences are presented and discussed. An analysis of these data allows a first test of standard quantum mechanics against de Broglie-Bohm theory

Belostoma estevezae Ribeiro and Alecrim (Heteroptera: Belostomatidae) reveals a new karyotype complement in Belostoma Latreille from mitotic metaphases

Belostoma Latreille comprende 74 especies de insectos acuáticos depredadores, con 42 de ellas registradas en Brasil. Este grupo se caracteriza por presentar cromosomas holocéntricos con sistemas de determinación sexual múltiple o simple. En Belostomatidae Leach, unas pocas especies presentan microcromosomas. Belostoma estevezae Ribeiro y Alecrim, especie endémica de Brasil, pertenece al grupo plebejum y se parece mucho a Belostoma micantulum Stål. En este trabajo describimos el complemento cromosómico y el contenido y distribución de la heterocromatina C constitutiva en machos de B. estevezae. Las células mitóticas de B. estevezae fueron obtenidas a partir de embriones provenientes de tres masas de huevos. Las preparaciones cromosómicas fueron teñidas con Giemsa 2% para la caracterización cariotípica de la especie y para la técnica de bandas C implementada. El cariotipo masculino de B. estevezae fue estimado como 26 + 4m + XY (2n = 32), lo que representa un complemento cariotípico nuevo para Belostoma. El sistema de determinación sexual y los patrones de distribución de bandas-C registrados en está especie son similares a los observados en B. plebejum y B. micantulum. Diferentes eventos de fisión de autosomas pueden explicar el alto número diploide encontrado en B. estevezae

Regulation of biological paternity investigation: comparative perspective

O objetivo deste artigo analisar comparativamente a legisla o relativa investiga o de paternidade biológica de crianças nascidas fora do casamento no brasil e em países europeus, com base em pesquisa de documentos legislativos pela internet e na consulta de bibliografia jurídica no mbito do direito da família. Foi elaborada uma tipologia legislativa verdade biológica absoluta e verdade biológica relativa atendendo s seguintes variáveis: formas de atribui o da paternidade (voluntária/ordem do tribunal); tipo de consentimento exigido para realiza o do teste genético (voluntário/forçado); autor da investiga o (estado/outros); e limite temporal da investiga o (existência de prazos processuais/ausência de prazo processual). A verdade biológica absoluta ocorre quando a investigação de paternidade decorre obrigatoriamente, podendo ser ordenado e forçado pelo tribunal o recurso ao teste genético. observou-se a prevalência da verdade biológica relativa. Em todos os países analisados verificou-se que o recurso ao teste genético preponderante no estabelecimento das relações de filiação. Mesmo em países em que necessário o consentimento para a realização de teste de DNA existem modalidades de submiss o mais subtis, que incluem a aplicação de multas ou a gera o da presunção da paternidade com base na recusa em realizar exame genético.The aim of this article is to do a comparative analysis relative to the investigation of biological paternity of children born out of wedlock in Brazil and european countries, based on the research of legislative documents through the internet and the consultation of legal bibliography in the area of family law. The legislative typology was made - absolute biological truth and relative biological truth according to the following variables: forms of paternal attribution (voluntary/court ordered), type of demanded consent for the performance of the genetic test (voluntary/forced), author of the investigation (state/other) and the time limit of the investigation (existence of process deadlines/no process deadlines). The absolute biological truth occurs when the investigation of paternity is compulsory and the court might order and force the submission to a genetic test. The dominating trend is relative biological truth. In all analysed countries it has been verified that the resource to genetic testing is preponderant when establishing affiliation relations. Even in countries where it's not possible to force an individual to the submission of a genetic exam, there are more subtle ways of submission, that include the application of fines or the assumption of paternity based on a refusal to perform the genetic exam.info:eu-repo/semantics/publishedVersio

Embryonic dormancy in seeds of Bactris gasipaes Kunth (peach-palm)

Bactris gasipaes is a domesticated palm whose fruits are of great importance for the Amazonian people and whose heart of palm is also receiving economic interest in other brazilian and Latin America regions. The aim of this study was verify embryonic dormancy and its correlation with first cataphyll emergence in B. gasipaes seeds collected from four plants at Manaus city and four others at Coari city, both in the Amazonas state, Brazil. After extraction and cleaning, some of the seeds (4 replications of 25 per plant) were sown in a seedbed with a sawdust and sand mixture as substrate, and embryos (4 replications of 10 per plant), after extraction, were inoculated into half strength Murashige and Skoog cultures. Were used 100 seeds and 40 embryo per treatment. Whole seed and embryo germination varied between the different source plants and locations, with the greatest difference observed for the emergence of first cataphyll from seeds in the seedbed. For the most part of variables, results of seed and embryo were positively associated, namely, as one went up the other also, and vice versa. These results suggesting that, at least in part, seed dormancy in Bactris gasipaes is associated with embryonic dormancy. © 2017, Associacao Brasileira de Tecnologia de Sementes. All rights reserved