Search

Abstract: A gluon resonance G of mass below 1 TeV could be the origin of the forward–backward asymmetry observed at the Tevatron provided that new decay modes , with q a standard quark and Q its massive excitation, make G broad enough. We consider all the different cases, with q the top, the bottom or a light quark and dominant decay modes or . We show that current experimental searches are unable to probe the model, but that minimal departures from these analyses can explore a large region of its parameter space for the current LHC luminosity. This includes the challenging case with the new quarks decaying mostly into light quark flavors. In some channels not only the heavy quark but also the massive gluon can be reconstructed, which would stablish the origin of the asymmetry. Similar analyses can be applied to more general models with new massive gluons and vectorlike quarks. [Copyright &y& Elsevier]

Abstract: We find that a heavy gluon G of mass 800–900 GeV with small, mostly axial-vector couplings to the light quarks and relatively large vector and axial-vector couplings to the top quark can explain the forward–backward asymmetry observed at the Tevatron with no conflict with other top-quark or dijet data. The key ingredient is a complete treatment of energy-dependent width effects and a new decay mode , where q is a standard quark and Q a vector-like quark of mass 400–600 GeV. We show that this new decay channel makes the heavy gluon invisible in the invariant mass distribution and discuss its implications at the Tevatron and the LHC. [Copyright &y& Elsevier]

Abstract: Hepatitis B virus (HBV) is responsible for a worldwide mortality of 1 million people each year. It constitutes a major public health problem, especially in highly endemic zones, where it concerns the youngest children, primarily by a mother to child transmission, with a strong risk of chronic hepatitis infection and hepatocellular carcinoma. Immunisation of children versus HBV is known to be efficient and safe. In Mayotte, a French overseas territory in Indian Ocean, immunisation versus HBV has been introduced since 1993 in the vaccine schedule, starting at day 1 of life. We report hereby the local experience and practice on HBV infection, state of vaccine coverage, and difficulties met with this major public health issue. [Copyright &y& Elsevier]

The patobiographic data of 4 great xx century artists - Modigliani, Matisse, Portinari and Rebecca Horn - are reviewed. Their artistic careers were cut short at some moment due to the professional diseases they suffered in relation with the materials used in their works. In the case of Matisse, this was due to his own temperament by manipulation of the scars from surgery. However, they fought against such impediments and when they overcame them, they were able to find new ways of artistic expression to channel their creativity., (Copyright © 2013 Elsevier España, S.L. All rights reserved.)