8,803 research outputs found
The Left-Right SU(3)(L)xSU(3)(R)xU(1)(X) Model with Light, keV and Heavy Neutrinos
We construct a full left-right model for the electroweak interactions based
on the gauge symmetry. The fermion
content of the model is such that anomaly cancellation restricts the number of
families to be a multiple of three. One of the most important features of the
model is the joint presence of three light active neutrinos, three additional
neutrinos at keV mass scale, and six heavy ones with masses
around\textbf{} GeV. They form a well-motivated part of the spectrum
in the sense they address challenging problems related to neutrino oscillation,
warm dark matter, and baryogenesis through leptogenesis.Comment: 11 pages. Small corrections and typos fixed. Accepted for publication
in PR
Crystal ball, virtual gallery C reation system for immersive environments
This paper presents a concept and a tool suite for authoring, configuring, organizing and displaying 3D virtual galleries, depicting multimedia content, like art, picture, movie or any other kind of media, which are appropriate for large-scale immersive virtual environments such as the CAVE™. A comparison was established by the authors with standard PC environments while experimenting virtual environments produced by Crystal Ball, showing the superior experience obtained by an installation of the type of CAVE™ that is in operation at Lousal, south of Portugal.info:eu-repo/semantics/publishedVersio
Percolation of strings and the first RHIC data on multiplicity and tranverse momentum distributions
The dependence of the multiplicity on the number of collisions and the
transverse momentum distribution for central and peripheral Au-Au collisions
are studied in the model of percolation of strings relative to the experimental
conditions at RHIC. The comparison with the first RHIC data shows a good
agreement.Comment: RevTeX, 11 pages, 4 eps figures included using epsfi
Neutrino Decay and Neutrinoless Double Beta Decay in a 3-3-1 Model
In this work we show that the implementation of spontaneous breaking of the
lepton number in the 3-3-1 model with right-handed neutrinos gives rise to fast
neutrino decay with majoron emission and generates a bunch of new contributions
to the neutrinoless double beta decay.Comment: Version accepted for publication in the Phys. Rev.
Avaliação de combinações híbridas de melancia no Submédio São Francisco.
As cultivares de melancia no Brasil apresentam frutos de bom teor de açúcar, mas são pouco produtivas, suscetíveis a doenças (Sphaerotheca fuliginea, Didimella bryoniae e viroses) e têm frutos grandes. Considerando a existência de linhas diplóides e tetraplóides com boa homozigose e que a resistência é monogênica e dominante, foram obtidas combinações híbridas diplóides e triplóides as quais foram avaliadas em 2001 e 2002 no Campo Experimental de Bebedouro, em Petrolina-PE, utilizando-se irrigação por gotejamento no espaçamento de 3 m entre fileiras e 0,80 m entre plantas. Na colheita foram avaliados produção por planta e peso de fruto (kg), teor de sólidos solúveis (°Brix), ocamento da polpa e número de sementes perfeitas nas ombinações triplóides. A maioria das combinações híbridas apresentou mais de dez quilogramas por planta, frutos de 4 a 12 kg e teor de sólidos solúveis acima de 10 °Brix e e, portanto, muito semelhantes às testemunhas. No entanto, algumas combinações híbridas apresentaram ocamento da polpa e sementes perfeitas (combinações triplóides) necessitando continuar a seleção para esses dois caracteres.Suplemento.Edição de Resumos expandidos e palestras do 43. Congresso Brasileiro de Olericultura, Recife, jul. 2003
Particle production azimuthal asymmetries in a clustering of color sources model
The collective interactions of many partons in the first stage of the
collisions is the usual accepted explanation of the sizable elliptical flow.
The clustering of color sources provides a framework of partonic interactions.
In this scheme, we show a reasonable agreement with RHIC data for pT<1.5 GeV/c
in both the dependence of v2 transverse momentum and in the shape of the
nuclear modified factor on the azimuthal angle for different centralities. We
show the predictions at LHC energies for Pb-Pb. In the case of proton-proton
collisions a sizable v2 is obtained at this energy.Comment: To appear in Journal of Physics
Cultura da melancia.
Importancia socieconomica no Nordeste brasileiro. Condicoes de irrigacao e de chuva. Tratos culturais e cultivo de cultura.bitstream/item/136245/1/ID-7033.pdfApostila do Curso de Atualizacao Tecnica para Engenheiros Agronomos do Banco do Brasil, Petrolina, 1995
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