36 research outputs found

    The structure of the Yang-Mills spectrum for arbitrary simple gauge algebras

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    The mass spectrum of pure Yang-Mills theory in 3+1 dimensions is discussed for an arbitrary simple gauge algebra within a quasigluon picture. The general structure of the low-lying gluelump and two-quasigluon glueball spectrum is shown to be common to all algebras, while the lightest C=C=- three-quasigluon glueballs only exist when the gauge algebra is Ar2_{r\geq 2}, that is in particular su(N3)\mathfrak{su}(N\geq3). Higher-lying C=C=- glueballs are shown to exist only for the Ar2_{r\geq2}, Doddr4_{{\rm odd}-r\geq 4} and E6_6 gauge algebras. The shape of the static energy between adjoint sources is also discussed assuming the Casimir scaling hypothesis and a funnel form; it appears to be gauge-algebra dependent when at least three sources are considered. As a main result, the present framework's predictions are shown to be consistent with available lattice data in the particular case of an su(N)\mathfrak{su}(N) gauge algebra within 't Hooft's large-NN limit.Comment: 21 pages, 4 figures; remarks added, typos corrected in v2. v3 to appear in EPJ

    Long-Baseline Neutrino Facility (LBNF) and Deep Underground Neutrino Experiment (DUNE) Conceptual Design Report Volume 2: The Physics Program for DUNE at LBNF

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    The Physics Program for the Deep Underground Neutrino Experiment (DUNE) at the Fermilab Long-Baseline Neutrino Facility (LBNF) is described

    Osteopatia hipertrófica em sete cães

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    Os achados clínico-patológicos de sete casos de osteopatia hipertrófica em cães foram estudados. Os cães afetados apresentavam sinais clínicos indicativos de envolvimento ósseo e lesões macroscópicas principalmente nos ossos longos dos membros. As lesões consistiram de neoformação óssea periosteal detectada em exame radiográfico, na inspeção óssea durante a necropsia e, com grande nível de detalhamento, em espécimes ósseos macerados. A proliferação óssea observada era parcialmente circunferencial e ocorreu principalmente na diáfise dos ossos longos. Era constituída por trabéculas ósseas de tamanho e espessura irregulares que estavam dispostas de forma perpendicular ao córtex ósseo original. Em todos os casos as lesões de osteopatia hipertrófica foram associadas a neoplasmas pulmonares (primários ou metastáticos)
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