4,681 research outputs found
Axial Anomaly from the BPHZ regularized BV master equation
A BPHZ renormalized form for the master equation of the field antifiled (or
BV) quantization has recently been proposed by De Jonghe, Paris and Troost.
This framework was shown to be very powerful in calculating gauge anomalies. We
show here that this equation can also be applied in order to calculate a global
anomaly (anomalous divergence of a classically conserved Noether current),
considering the case of QED. This way, the fundamental result about the
anomalous contribution to the Axial Ward identity in standard QED (where there
is no gauge anomaly) is reproduced in this BPHZ regularized BV framework.Comment: 10 pages, Latex, minor changes in the reference
Noncommutative Particles in Curved Spaces
We present a formulation in a curved background of noncommutative mechanics,
where the object of noncommutativity is considered as an
independent quantity having a canonical conjugate momentum. We introduced a
noncommutative first-order action in D=10 curved spacetime and the covariant
equations of motions were computed. This model, invariant under diffeomorphism,
generalizes recent relativistic results.Comment: 1+15 pages. Latex. New comments and results adde
Hamiltonian embedding of the massive noncommutative U(1) theory
We show that the massive noncommutative U(1) can be embedded in a gauge
theory by using the BFFT Hamiltonian formalism. By virtue of the peculiar
non-Abelian algebraic structure of the noncommutative massive U(1) theory,
several specific identities involving Moyal commutators had to be used in order
to make the embedding possible. This leads to an infinite number of steps in
the iterative process of obtaining first-class constraints. We also shown that
the involutive Hamiltonian can be constructed.Comment: 8 pages, Revtex (multicol
Hypogonadotropic hypogonadism due to compound heterozygous mutations TACR3 in siblings
The authors present a new association of two heterozygous TACR3 mutations (p.Arg230His and p.Trp275*) responsible for a clinical trait of normosmic congenital hypogonadotropic hypogonadism in a family.info:eu-repo/semantics/publishedVersio
Diversidade genética entre genótipos de bananeira detectada por marcadores SSR.
A bananicultura é uma atividade de elevada importância econômica e social, responde pela produção de alimento básico para as populações carentes de diversos paÃses. O uso de técnicas que apresentem elevada reprodutibilidade e que sejam estáveis, como os microssatélites, são importantes, pois auxiliam na caracterização de espécies economicamente importantes como bananeiras e na criação de perfis moleculares de variedades (1)
Diversidade genética em genótipos de bananeira por meio de variáveis morfoagronômicas e moleculares.
A cultura da banana possui grande importância econômica e social, presente na mesa de todas as camadas sociais da população. O Brasil é o sexto maior produtor do mundo com uma produção de 6.978.310 toneladas em uma área cultivada de 486.991ha (FAO, 2012). A caracterização é uma atividade primordial na geração de conhecimentos de germoplasma por identificar, descrever e diferenciar os genótipos de qualquer espécie, auxiliando, no manejo do germoplasma e no fornecimento de informações ao melhoramento genético (VICENTE et al., 2005)
Comparison between cluster methods using simultaneous analysis of qualitative and quantitative data in bananas.
Understanding the genetic variability in germplasm banks is essential to genetic breeding programs. Usually quantification of the variability is carried out using quantitative and qualitative data separately, which may not be enough to infer about the similarity between the genotypes evaluated
- …