5,533 research outputs found
radiative decay of resonances dynamically generated from the vector meson-vector meson interaction
We evaluate the radiative decay into a vector a pseudoscalar and a photon of
several resonances dynamically generated from the vector vector interaction.
The process proceeds via the decay of one of the vector components into a
pseudoscalar and a photon, which have an invariant mass distribution very
different from phase space as a consequence of the two vector structure of the
resonances. Experimental work along these lines should provide useful
information on the nature of these resonances.Comment: 13 pages, 5 figure
Radiative open charm decay of the Y(3940), Z(3930), X(4160) resonances
We determine the radiative decay amplitudes for decay into and , or and of some of the charmonium like
states classified as X,Y,Z resonances, plus some other hidden charm states
which are dynamically generated from the interaction of vector mesons with
charm. The mass distributions as a function of the or
invariant mass show a peculiar behavior as a consequence of
the nature of these states. The experimental search of these
magnitudes can shed light on the nature of these states.Comment: 18 pages, 9 figure
Three body systems with strangeness and exotic systems
We report on four 's and three 's, in the 1500 - 1800 MeV
region, as two meson - one baryon S-wave resonances found by solving
the Faddeev equations in the coupled channel approach, which can be associated
to the existing = -1, low lying baryon resonances. On the
other hand we also report on a new, hidden strangeness state, mostly made
of , with mass around 1920 MeV, which we think could be
responsible for the peak seen in the around this
energy. Finally we address a very novel topic in which we show how few body
systems of several mesons can be produced, with their spins aligned up
to J=6, and how these states found theoretically can be associated to several
known mesons with spins J=2,3,4,5,6.Comment: Talk at the 21st European Conference on Few Body Problems in Physics,
Salamanca, Sep. 201
Effect of Greenhouse Film Cover on the Development of Fungal Diseases on Tomato (Solanum lycopersicum L.) and Pepper (Capsicum annuum L.) in a Mediterranean Protected Crop
Greenhouses on the Mediterranean coast mainly use plastic materials as their cover. The
influence of light exerted by these materials directly affects the crops by modifying the environment in which they develop. The aim of this study was to analyze the effect of the use of two plastic films in an experimental greenhouse on the development of fungal diseases in two spring–summer crop cycles: tomato (Solanum lycopersicum L.) from february to July 2021 and pepper (Capsicum annuum L.) from February to July 2022. The study was carried out in Almeria (Spain) in a multispan greenhouse divided transversely into two sectors by a polyethylene sheet. A commercial film was installed in the east sector (90% of transmissivity and 55% diffusivity) and an experimental film was
installed in the west sector (85% of transmissivity and 60% diffusivity). In addition, the effect of the yield and quality of the harvested fruit was determined. In this study, two diseases were established
naturally on the crop: (i) powdery mildew (Leveillula taurica) in both the tomato and the pepper crop cycles and (ii) early blight (Alternaria solani) in the tomato. The analyses of both diseases showed that the areas of the greenhouse that used the plastic cover, which presented a lower sunlight
transmissivity, showed higher levels of disease than the areas that used the plastic cover that allowed greater transmissivity of light within the greenhouse, differing statistically in some phases of the crop. The marketable yield was 4.2% (for tomato) and 3.1% (for pepper) higher in the sector
with the experimental film with high transmissivity. For both crops, the quality of the fruits did not show statistically significant difference
Two, three, many body systems involving mesons
In this talk we show recent developments on few body systems involving
mesons.
We report on an approach to Faddeev equations using chiral unitary dynamics,
where an explicit cancellation of the two body off shell amplitude with three
body forces stemming from the same chiral Lagrangians takes place. This removal
of the unphysical off shell part of the amplitudes is most welcome and renders
the approach unambiguous, showing that only on shell two body amplitudes need
to be used. Within this approach, systems of two mesons and one baryon are
studied, reproducing properties of the low lying states. On the other
hand we also report on multirho and multirho states which can be
associated to known meson resonances of high spin.Comment: Talk given in the International School of Nuclear Physics, Erice 201
Aprendizaje del Fibrobroncoscopio del Servicio de Anestesiología del Hospital Universitario de Getafe: Programa de aprendizaje
Las complicaciones más severas en Anestesiología son las relacionadas con la Vía Aérea, y una dificultad de intubación o ventilación del paciente originan una gran mórbida/mortalidad.
En los últimos años, para mejorar la seguridad del paciente en este campo, ha habido una evolución muy importante en el manejo de la Vía Aérea Difícil (VAD).
Las Sociedades internacionales más prestigiosas de este campo aconsejan en sus últimos trabajos y guías (ASA [Sociedad Americana de Vía Aérea Difícil] en el algoritmo del 2013, y la DAS [Difficult Airway Society] en el NAP4 y las guías de 2015….) aconsejan que todos los miembros del servicio de Anestesiología sean capaces de poder realizar una intubación con Fibroscopio (FOB) en paciente despierto cuando se precise. Es decir, en aquellos pacientes que tienen una intubación difícil conocida, y en los que administrarles anestesia general para realizar una intubación, perdiendo la respiración espontanea, supone un riesgo muy importante para ellos
Study of the , , and in the radiative decays
In this paper we present an approach to study the radiative decay modes of
the into a photon and one of the tensor mesons ,
, as well as the scalar ones and .
Especially we compare predictions that emerge from a scheme where the states
appear dynamically in the solution of vector meson--vector meson scattering
amplitudes to those from a (admittedly naive) quark model. We provide evidence
that it might be possible to distinguish amongst the two scenarios, once
improved data are available.Comment: The large Nc argument improved; version published in EPJA
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