[en] A general method is devised for the automatic generation of Feynman diagrams in gauge (and other) field theories. The performance of an implemented computer program is also described, as well as a number of tests that rely on complementary enumeration techniques. 17 refs., 1 fig., 2 tabs

[en] Using the invariance under BRS transformations we derive Ward identities for the Zγγ and ZZγ Green's functions. Anomalous contributions to these identities are also obtained using the path integral formalism. The results agree with our previous calculation in perturbation theory. (orig.)

[en] The development and design of this training has been done through an online platform robust which allows tracking and granular control of the course of effectively. Therefore this formation may have characteristics both nationally and internationally, being the latter case which has aroused greater demand in the last year, by the characteristics of training covering the master's degree in radiological protection. (Author)

[en] We examine the reaction e⁺e^-→γ+missing momentum in various majoron models that predict the existence of very light scalars coupled to the Z. The relevant features for neutrino counting experiments are obtained. (orig.)

[en] We calculate the contribution of an electric dipole ZZγ transition to the e⁺e^- → νanti νγ cross section. With suitable cuts in the photon spectrum, it should be possible to improve, by two orders of magnitude, the present bound on the coupling constant. (orig.)

[en] In this work we have developed a graphical interface applied to obtain radiographic equipment with digital imaging. which are replacing conventional analog image. This increased use of digital technology device requires a study of the analysis of the image quality obtained in this type of equipment, such analysis is necessary to ensure adequate images that allow a correct diagnosis.

[en] The cross section for single W^- production in e⁺e^- collisions is exactly computed for an arbitrary W magnetic moment. It is found that this process may give a first look at the WWγ vertex just below the two W threshold. A detailed comparison is made with previous calculations that used the equivalent photon approximation. (orig.)

[en] From the Group of WG7 internal dosimetry of the EURADOS Organization (European Radiation Dosimetry group, e.V.) which It coordinates CIEMAT, international action for the vivo measurement of americium has been conducted in three mannequins type skull with detectors of Germanium by gamma spectrometry and simulation by Monte Carlo methods. Such action has been raised as two separate exercises, with the participation of institutions in Europe, America and Asia. Other actions similar precede this vivo intercomparison of measurement and modeling Monte Carlo1. The preliminary results and associated findings are presented in this work. The laboratory of the body radioactivity (CRC) of service counter of dosimetry staff internal (DPI) of the CIEMAT, it has been one of the participants in vivo measures exercise. On the other hand part, the Group of numerical dosimetry of CIEMAT is participant of the Monte Carlo2 simulation exercise. (Author)

[en] A few chosen examples of Feynman diagram generation with special constraints-and which may be used to speed up some multiloop calculations-are presented in this paper. It will be shown that with a little help QGRAF can be used to solve some types of problems that may seem to be out of its current reach. Those examples also serve to expose some weaknesses of the package, which will hopefully be lessened in future releases

[en] In this work, we provide a triple master action interpolating among three self-dual descriptions of massive spin-3/2 particles in $D=2+1$ dimensions. Such result generalizes a master action previously suggested in the literature. We also show that, surprisingly a shorthand notation in terms of differential operators applied in the bosonic cases of spins 2 and 3 can also be defined to the fermionic case. With the help of projection operators, we have also obtained the propagator and analyzed unitarity in D dimensions of a second-order spin-3/2 doublet model. Once we demonstrate that this doublet model is free of ghosts, we provide a master action interpolating such model with a fourth-order theory which has several similarities with the spin-2 linearized New Massive Gravity theory.