10,372 research outputs found
Constraining Elko Dark Matter at the LHC with Monophoton Events
A mass dimension one fermion, also known as Elko, constitutes a dark matter
candidate which might interact with photons at the tree level in a specific
fashion. In this work, we investigate the constraints imposed by unitarity and
LHC data on this type of interactions using the search for new physics in
monophoton events. We found that Elkos which can explain the dark matter relic
abundance mainly through electromagnetic interactions are excluded at the
95\%CL by the 8 TeV LHC data for masses up to 1 TeV.Comment: 6 pages, 4 figure
O extrativismo de mangaba é "trabalho de mulher"? duas situações empíricas no nordeste e norte do Brasil.
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Adubação NPK na cultura do arroz (Oryza sativa, L), conduzida em sistema de pesquisa participativa em agricultura familiar, no município de Ponta de Pedras, PA.
bitstream/item/39956/1/Com-Tec-40-Am-Oriental.pd
Resonant Lepton-Gluon Collisions at the Large Hadron Collider
We study the lepton-induced resonant production of color-adjoint leptons
(leptogluons) at the LHC employing the lepton parton density function of the
proton. We demonstrate that this production mechanism can be useful to extend
the LHC ability to search for leptogluons beyond purely quark/gluon initiated
production processes up to ~ 3.5 TeV leptogluon masses and O(1) TeV
compositeness scales. Discerning leptogluons from scalar and vector leptoquarks
is also possible in this channel, given a data sample containing the order of
100 signal events. We argue that the resonant channel can be combined with
leptogluon pair and associated leptogluon-lepton productions to boost exclusion
limits and discovery prospects at the LHC.Comment: 15 pages, 8 figure
Compactação de sulco de plantio e inseticidas no controle de cupins rizófagos em arroz de terras altas.
Este trabalho teve como objetivo determinar o efeito da compactação de sulco combinada com inseticidas aplicados via tratamento de sementes, no dano por ataque de cupins na cultura do arroz de terras altas, em plantio direto.Conpeex 2012
Planejamento de uso das áreas em integração lavoura-pecuária-floresta no bioma pampa.
bitstream/item/79444/1/Circular-137.pd
Short-Circuit Impedance of Power Transformers: the Fractional Order Calculus Approach
First IFAC Workshop on Fractional Differentiation and Its Application - 19-21 July 2004, Enseirb, Bordeaux, France - FDA'04This paper reports investigation on the modeling of the short circuit
impedance of power transformers, using fractional order calculus, analyzing the
influence of the diffusion phenomena in the windings. This aims to better
characterize the medium frequency range behavior of leakage inductances of power
transformer models, which include terms to represent the magnetic field diffusion in
the windings. Calculated and measured values are shown and compared
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