26,349 research outputs found
Inclusive hadron and photon production at LHC in dipole momentum space
Using a momentum space model for the dipole scattering amplitude we present
an analysis of the saturation effects at LHC energies, describing the data on
proton-proton and proton-lead collisions. The model is based on the asymptotic
solutions of the Balitsky-Kovchegov equation, being ideal in the saturation
domain where the target wave function has a high occupation number. We also
make predictions for the nuclear modification ratios on charged hadron and
prompt photon production in the forward region, where the high parton density
effects are important.Comment: New section added and typos corrected. To be published in PR
First study of the gluon-quark-antiquark static potential in SU(3) Lattice QCD
We study the long distance interaction for hybrid hadrons, with a static
gluon, a quark and an antiquark with lattice QCD techniques. A Wilson loop
adequate to the static hybrid three-body system is developed and, using a 24^3
x 48 periodic lattice with beta=6.2 and a ~ 0.075 fm, two different geometries
for the gluon-quark segment and the gluon-antiquark segment are investigated.
When these segments are perpendicular, the static potential is compatible with
confinement realized with a pair of fundamental strings, one linking the gluon
to the quark and another linking the same gluon to the antiquark. When the
segments are parallel and superposed, the total string tension is larger and
agrees with the Casimir Scaling measured by Bali. This can be interpreted with
a type-II superconductor analogy for the confinement in QCD, with repulsion of
the fundamental strings and with the string tension of the first topological
excitation of the string (the adjoint string) larger than the double of the
fundamental string tension.Comment: 4 pages RevTeX, 4 figure
Nematic liquid crystal dynamics under applied electric fields
In this paper we investigate the dynamics of liquid crystal textures in a
two-dimensional nematic under applied electric fields, using numerical
simulations performed using a publicly available LIquid CRystal Algorithm
(LICRA) developed by the authors. We consider both positive and negative
dielectric anisotropies and two different possibilities for the orientation of
the electric field (parallel and perpendicular to the two-dimensional lattice).
We determine the effect of an applied electric field pulse on the evolution of
the characteristic length scale and other properties of the liquid crystal
texture network. In particular, we show that different types of defects are
produced after the electric field is switched on, depending on the orientation
of the electric field and the sign of the dielectric anisotropy.Comment: 7 pages, 12 figure
Chaotic Interaction of Langmuir Solitons and Long Wavelength Radiation
In this work we analyze the interaction of isolated solitary structures and
ion-acoustic radiation. If the radiation amplitude is small solitary structures
persists, but when the amplitude grows energy transfer towards small spatial
scales occurs. We show that transfer is particularly fast when a fixed point of
a low dimensional model is destroyed.Comment: LaTex + 4 eps file
e-Termos: a computer-supported collaborative work system for terminological management.
The e-Termos is a Web Collaborative Environment composed of six working modules to automatize tasks for managing terminological products. Each module is responsible for tasks inherent to the process of creating terminologies having different tools that assist the Natural Language Processing activities and also collaborative tools for supporting the communication and interaction needs of team members. The main contributions of e-Termos are the collaborative aspect instantiated in terminological practice, the flexible creation of Terminological Records and the possibility of being used for teaching terminology, lexicography and translation.Propor 2010. Demonstration
Desenvolvimento, caracterização fĂsico-quĂmica e sensorial de biscoito com farinha de soja orgânica de cultivares especiais para a alimentação humana.
Carcass measurements and finishing of purebred and crossbred steers in two different feeding systems.
Solos da Unidade Experimental da Embrapa Uva e Vinho em Bento Gonçalves, RS.
Apresenta a identificação e o levantamento pedolĂłgico da Unidade Experimental da Embrapa Uva e Vinho, no municĂpio de Bento Gonçalves, RS. A área estudada, localiza-se na RegiĂŁo do Vale dos Vinhedos
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