Observing an invisible Higgs boson

Given its weak coupling to bottom quarks and tau leptons, the Higgs boson may predominantly decay into invisible particles like gravitinos, neutralinos, or gravitons. We consider the manifestation of such an invisibly decaying Higgs boson in weak boson fusion at the CERN LHC. Distinctive kinematic distributions of the two quark jets of the signal as compared to Zjj and Wjj backgrounds allow to restrict the Higgs branching ratio to 'invisible' final states to some 13% with 10 fb(-1) of data, provided events with two energetic forward jets of high dijet invariant mass and with substantial missing transverse momentum can be triggered efficiently. It is also possible to discover these particles with masses up to 480 GeV in weak boson fusion, at the 5 sigma level, provided their invisible branching ratio is close to 100%. (C) 2000 Elsevier B.V. B.V. All rights reserved.

Spontaneous breaking of the lepton number and invisible majoron in a 3-3-1 model

In this work we implement the spontaneous breaking of lepton number in version II of the 3-3-1 models and study their phenomenological consequences. The main result of this work is that our majoron is invisible even though it belongs to a triplet representation by the 3-3-1 symmetry.

Invisible axion and neutrino masses

We show that in any invisible axion model due to the effects of effective nonrenormalizable interactions related to an energy scale near the Peccei-Quinn, grand unification or even the Planck scale, active neutrinos necessarily acquire masses in the sub-eV range. Moreover, if sterile neutrinos are also included and if appropriate cyclic Z(N) symmetries are imposed, it is possible that some of these neutrinos are heavy while others are light.

Grenada: a gender impact assessment of hurricane Ivan - making the invisible visible

Includes bibliography

The invisible face of child labour in Latin America and the Caribbean

Child labour has a gender bias related to the dominant stereotypes regarding gender roles. While out-of-home paid work is carried out predominantly by boys, girls bear the greater burden in unpaid domestic tasks, whether in their own homes or the homes of others. Boys are more exposed to the risks of being out on the street and find it more difficult to combine work and education. For girls it may be easier to reconcile the spheres of work and education, but they suffer costs that remain hidden and that reinforce their disadvantages throughout the life cycle. On the one hand, they are marked by the assumption that the burden of the care economy is entirely their responsibility, which determines future labour prospects. Indeed, even when girls show greater educational achievement, their occupational options are more limited. On the other hand, girls are exposed to risk within the household, where overexploitation, maltreatment and abuse are as frequent as they are unpunished.

Trabajo infantil en América Latina y el Caribe: su cara invisible

El trabajo infantil tiene un sesgo de género relacionado con los estereotipos dominantes en la distribución social de los roles sexuales. Mientras en los varones prevalece el trabajo remunerado fuera de casa, las niñas cargan con el mayor peso en las tareas domésticas, sea en hogares propios o ajenos. Esto tiene para ellas costos que permanecen ocultos y que refuerzan desventajas en todo el ciclo vital vinculadas a la asignación social y cultural del cuidado y el trabajo reproductivo a las mujeres. Este número de Desafíos es sobre la cara invisible del trabajo infantil donde se destaca el mayor peso que tienen las niñas en el trabajo doméstico remunerado y no remunerado en América Latina y el Caribe, y los riesgos a los que se exponen.

The invisible blackness of Harryette Mullen's poetry: writing, miscegenation and what remais to be seen

Este ensaio aborda a poética de Harryette Mullen, poetisa afro-americana cuja obra questiona os limites que moldam as expectativas pela inteligibilidade acessível na literatura afro-americana. Os poemas de Mullen exploram as bordas da inteligibilidade, avançando para além das expectativas por uma forma visível/ Rev. Let., São Paulo, v.52, n.1, p.101-120, jan./jun. 2012. 119 inteligível de linguagem que abarcaria a experiência da negritude. Argumenta-se que a escrita na poesia de Mullen funciona como um processo de miscigenação ao jogar com a ilegibilidade da negritude, para além de uma linha visível de distinção entre o que é ou que deveria ser considerado como parte apropriada da negritude, o que possibilita novas formas de reflexão sobre a poesia como um instrumento politicamente significativo para se repensar o papel da poetisa e do poeta negros no espaço da diáspora negra.

Search for invisible decays of Higgs bosons in the vector boson fusion and associated ZH production modes

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

A tradução de Invisible Man, de Ralph Ellison: o jogo entre racialidade e integracionismo

Relating the surface of a translated text to discourse is one of the focuses in the connection between Translation Studies and African- -American literature. In this respect, “Invisible Man”, by Ralph Ellison, and its Brazilian translation, by Márcia Serra, present themselves as material for analyzing contexts which evoke a sense of community and racial identity. Therefore, this paper centers precisely upon nuances in meaning of the linguistic displays of bonding and race. It could be noticed that these aspects were less marked in the translation, whereas the integrationist project featured in the novel was to a certain extent rewritten in words that called forth a sense of racial dichotomy. Thus, the translation displays at once the non-racialized perspective peculiar to the Brazilian view of race and assumptions in regard to the perspective of the African-American Other on race relations.

The Invisible Blackness of Harryette Mullen's Poetry: Writing, Miscegenation, and What Remains to Be Seen

This essay addresses the poetics of Harryette Mullen, an awarded African-American female poet whose work questions the boundaries that shape the expectations for accessible intelligibility in African-American literature. Mullen’s poems skirt the edges of intelligibility by going beyond the expectations for a visible/intelligible form of language that would embrace the experience of blackness. I argue that writing in Mullen’s poetry works as process of miscegenation by playing on the illegibility of blackness, beyond a visible line of distinction between what is or should be considered part of blackness itself, which engages new forms of reflection on poetry as a politically meaningful tool for rethinking the role of the black (female) poet within the black diaspora.

A tradução da identidade linguística afro-americana em Invisible Man, de Ralph Ellison: questões de integração racial e negritude no uso do inglês vernacular afro-americano

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Influence of Clinically Invisible, but Optical Coherence Tomography Detected, Optic Disc Margin Anatomy on Neuroretinal Rim Evaluation

PURPOSE. We previously demonstrated that most eyes have regionally variable extensions of Bruch's membrane (BM) inside the clinically identified disc margin (DM) that are clinically and photographically invisible. We studied the impact of these findings on DM- and BM opening (BMO)-derived neuroretinal rim parameters. METHODS. Disc stereo-photography and spectral domain optical coherence tomography (SD-OCT, 24 radial B-scans centered on the optic nerve head) were performed on 30 glaucoma patients and 10 age-matched controls. Photographs were colocalized to SD-OCT data such that the DM and BMO could be visualized in each B-scan. Three parameters were computed: (1) DM-horizontal rim width (HRW), the distance between the DM and internal limiting membrane (ILM) along the DM reference plane; (2) BMO-HRW, the distance between BMO and ILM along the BMO reference plane; and (3) BMO-minimum rim width (MRW), the minimum distance between BMO and ILM. Rank-order correlations of sectors ranked by rim width and spatial concordance measured as angular distances between equivalently ranked sectors were derived. RESULTS. The average DM position was external to BMO in all quadrants, except inferotemporally. There were significant sectoral differences among all three rim parameters. DM- HRW and BMO-HRW sector ranks were better correlated (median rho = 0.84) than DM- HRW and BMO-MRW (median rho = 0.55), or BMO-HRW and BMO-MRW (median rho = 0.60) ranks. Sectors with the narrowest BMO-MRW were infrequently the same as those with the narrowest DM-HRW or BMO-HRW. CONCLUSIONS. BMO-MRW quantifies the neuroretinal rim from a true anatomical outer border and accounts for its variable trajectory at the point of measurement. (Invest Ophthalmol Vis Sci. 2012;53:1852-1860) DOI:10.1167/iovs.11-9309

Living Invisible: HTLV-1-Infected Persons and the Lack of Care in Public Health

Introduction: Human T-cell lymphotropic virus type 1 (HTLV-1) infection is intractable and endemic in many countries. Although a few individuals have severe symptoms, most patients remain asymptomatic throughout their lives and their infections may be unknown to many health professionals. HTLV-1 can be considered a neglected public health problem and there are not many studies specifically on patients' needs and emotional experiences. Objective: To better understand how women and men living with HTLV-1 experience the disease and what issues exist in their healthcare processes. Methods: A qualitative study using participant observation and life story interview methods was conducted with 13 symptomatic and asymptomatic patients, at the outpatient clinic of the Emilio Ribas Infectious Diseases Institute, in Sao Paulo, Brazil. Results and Discussion: The interviewees stated that HTLV-1 is a largely unknown infection to society and health professionals. Counseling is rare, but when it occurs, focuses on the low probability of developing HTLV-1 related diseases without adequately addressing the risk of infection transmission or reproductive decisions. The diagnosis of HTLV-1 can remain a stigmatized secret as patients deny their situations. As a consequence, the disease remains invisible and there are potentially negative implications for patient self-care and the identification of infected relatives. This perception seems to be shared by some health professionals who do not appear to understand the importance of preventing new infections. Conclusions: Patients and medical staff referred that the main focus was the illness risk, but not the identification of infected relatives to prevent new infections. This biomedical model of care makes prevention difficult, contributes to the lack of care in public health for HTLV-1, and further perpetuates the infection among populations. Thus, HTLV-1 patients experience an "invisibility" of their complex demands and feel that their rights as citizens are ignored.

Tradurre la saggistica: proposta di traduzione di un estratto di "The invisible history of the human race"

The aim of this dissertation is to propose the translation of four chapters from "The invisible history of the human race", an essay by the Australian author and journalist Christine Kenneally. This essay offers a non-systematic overview upon genealogy in connection to the idea of personal identity; above all, the author wants to persuade the reader that genealogy could be the perfect linking point between history and science, family lines and DNA. The translated chapters particularly concentrate on the reasons of the current underestimation of genealogy, which, according to Kenneally, lies in the Nazi’s distorted use of ancestry and in the exploitation of the idea of biological diversity in order to discriminate people. The dissertation is composed of four chapters. The first chapter consists in a concise analysis of the characteristics of the textual genre and in a theoretical introduction and approach to the translation of essays, where the main generic and essay-specific translation strategies are outlined. The second chapter presents a detailed illustration of the topics treated in the essay and particularly in the translated pages. The third chapter contains the translation and the fourth presents a systematic comment to the translation and to the choices made during the translation of the text.