Luciano Abreu

Aug 12, 2024 | link.aps.org | Luciano Abreu |Instituto de Física

We present a coupled channel treatment of meson-meson dynamics, for systems with spin-parity 1+, and determine the corresponding amplitudes by solving the Bethe-Salpeter equations, which lead to the generation of two axial resonances when mesons are considered as the degrees of freedom in the model. One of them is narrow and has properties in good agreement with those of D1(2420). The other pole is wider, but its real and imaginary parts do not match well with the mass and width of D1(2430).

Sep 7, 2023 | link.aps.org | Instituto de Física |Campus Ondina |Jing Song |Luciano Abreu

We search for a B decay mode where one can find a peak for a DD¯ bound state predicted in effective theories and in lattice QCD calculations, which has also been claimed from some reactions that show an accumulated strength in DD¯ production at threshold. We find a good candidate in the B+→K+ηη reaction, by looking at the ηη mass distribution.

Feb 8, 2023 | g1.globo.com | Valéria Oliveira |Luciano Abreu |Rede Amazônica

Uma tropa com 100 policiais da Força Nacional chegou a Boa Vista na noite dessa terça-feira (8) para reforçar a segurança na Terra Indígena Yanomami, onde há invasão de garimpeiros e indígenas doentes, principalmente, com malária e desnutrição por conta dos invasores ilegais no território. Os agentes chegaram em um avião da Força Aérea Brasileira.