Mass problem in the Standard Model

We propose a new $\mathrm{SU}(3)_C \otimes \mathrm{SU}(2)_{L}\otimes \mathrm{U}(1)_{Y}\otimes \mathrm{U}(1)_{X}$ gauge model which is non universal respect to the three fermion families of the Standard Model. We introduce additional one top-like quark, two bottom-like quarks and three right handed neutrinos in order to have an anomaly free theory. We also consider additional three right handed neutrinos which are singlets respect to the gauge symmetry of the model to implement see saw mechanism and give masses to the light neutrinos according to the neutrino oscillation phenomenology. In the context of this horizontal gauge symmetry we find mass ansatz for leptons and quarks. In particular, from the analysis of solar, atmospheric, reactor and accelerator neutrino oscillation experiments, we get the allow region for the Yukawa couplings for the charge and neutral lepton sectors according with the mass squared differences and mixing angles for the two neutrino hierarchy schemes, normal and inverted.Comment: Conference proceedings from 6th International Conference on New Frontiers in Physics (ICNFP 2017) from August 17th to 29th of 2017 at the Conference Center of the Orthodox Academy of Creta (OAC) in Kolymbari (Crete), Greec

Diphoton decay for a 750 GeV scalar boson in a SU(6)⊗U(1)XSU(6)\otimes U(1)_{X} model

We propose a new $SU(6)\otimes U(1)_{X}$ GUT model free from anomalies, with a 750 GeV scalar candidate which can decay into two photons, compatible with the recent diphoton signal reported by ATLAS and CMS collaborations. This model gives masses to all fermions and may explain the 750GeV signal through one loop decays to $\gamma\gamma$ with charged vector and charged Higgs bosons, as well as up- and electron-like exotic particles that arise naturally from the condition of cancellation of anomalies of the $SU(6)\otimes U(1)_{X}$ group. We obtain, for different width approximations, allowed mass regions from 900 GeV to 3 TeV for the exotic up-like quark, in agreement with ATLAS and CMS collaborations data.Comment: 4 figures, discussion extended, 1 new figur

PETROGENETIC CONSIDERATIONS AND GEOCHRONOLOGY OF PORPHYRITIC IGNEOUS ROCKS EXPOSED IN THE VENTANAS CREEK (ARBOLEDAS, NORTE DE SANTANDER - COLOMBIA): METALLOGENIC IMPLICATIONS

En el sector de la quebrada Ventanas (sector suroccidental del municipio Arboledas; Norte de Santander), se reconoce la presencia de rocas ígneas porfiríticas de composición riodacítica, las cuales fueron datadas por U-Pb en circones mediante el método de LA-ICP-MS (Laser Ablation – Inductively Coupled Plasma –Mass Spectrometry), arrojando una edad de 13.9±0.2 Ma (Langhian; Mioceno, Neógeno). Los datos petrográficos y geoquímicos de éstas rocas, indican que éstas se formaron en un contexto de subducción, en ambientes de arco magmático de margen continental. Las altas relaciones Sr/Y (entre ~44.0 y 94.3) y la ausencia de anomalía negativa en Eu en éstas rocas, apuntan a que éstos magmas debieron tener un alto contenido de volátiles y por lo tanto pueden tener un alto potencial para formar mineralizaciones de tipo pórfido de Cu-Au-Mo. Considerando que el magmatismo del Neógeno se manifiesta igualmente en el Distrito Minero de Vetas y California (unos 40 km al SW del área de estudio); en donde ha sido relacionado con procesos de interés metalogénico; es posible suponer que el emplazamiento de estos magmas debió haber sido facilitado por la alta permeabilidad cortical generada por algunas fallas de dirección NE que afectan al Macizo de Santander (por ejemplo: Suratá-Arboledas y Cucutilla). Por consiguiente, las áreas localizadas a lo largo de estas estructuras pueden tener un gran interés para la exploración de depósitos minerales relacionados con procesos magmático-hidrotermales.Around the Ventanas creek (southwestern sector of the Arboledas town, North Santander), porphyritic igneous rocks of rhyodacitic composition have been recognized and dated by zircon U-Pb methods using LA-ICP-MS (Laser Ablation - Inductively Coupled Plasma - Mass Spectrometry) yielding an age of 13.9 ± 0.2 Ma (Langhian; Miocene, Neogene). Petrographic and geochemical data obtained from these rocks indicate that their origin is likely subduction-related, and that they were emplaced in a continental magmatic arc context. The high Sr/Y values (between ~ 44.0 and 94.3) and the absence of marked negative Eu anomalies suggest that the related magmas had high volatile contents, and therefore may have a high potential to form Cu-Au-Mo porphyry mineralization. Considering that the Neogene magmatism has been also reported in the California-Vetas Mining District (located ~40 km to SW of the studied area), where it is known to be related to metallogenic processes, we infer that the magma emplacement could have been facilitated by the high crust permeability generated by NE-trending faults affecting the Santander Massif (e.g. Arboledas-Suratá and Cucutilla faults). Therefore, other areas located along these structures can be considered of great interest for mineral exploration because of the related magmatic-hydrothermal processes

PETROGENETIC CONSIDERATIONS AND GEOCHRONOLOGY OF PORPHYRITIC IGNEOUS ROCKS EXPOSED IN THE VENTANAS CREEK (ARBOLEDAS, NORTE DE SANTANDER - COLOMBIA): METALLOGENIC IMPLICATIONS

En el sector de la quebrada Ventanas (sector suroccidental del municipio Arboledas; Norte de Santander), se reconoce la presencia de rocas ígneas porfiríticas de composición riodacítica, las cuales fueron datadas por U-Pb en circones mediante el método de LA-ICP-MS (Laser Ablation – Inductively Coupled Plasma –Mass Spectrometry), arrojando una edad de 13.9±0.2 Ma (Langhian; Mioceno, Neógeno). Los datos petrográficos y geoquímicos de éstas rocas, indican que éstas se formaron en un contexto de subducción, en ambientes de arco magmático de margen continental. Las altas relaciones Sr/Y (entre ~44.0 y 94.3) y la ausencia de anomalía negativa en Eu en éstas rocas, apuntan a que éstos magmas debieron tener un alto contenido de volátiles y por lo tanto pueden tener un alto potencial para formar mineralizaciones de tipo pórfido de Cu-Au-Mo. Considerando que el magmatismo del Neógeno se manifiesta igualmente en el Distrito Minero de Vetas y California (unos 40 km al SW del área de estudio); en donde ha sido relacionado con procesos de interés metalogénico; es posible suponer que el emplazamiento de estos magmas debió haber sido facilitado por la alta permeabilidad cortical generada por algunas fallas de dirección NE que afectan al Macizo de Santander (por ejemplo: Suratá-Arboledas y Cucutilla). Por consiguiente, las áreas localizadas a lo largo de estas estructuras pueden tener un gran interés para la exploración de depósitos minerales relacionados con procesos magmático-hidrotermales.Around the Ventanas creek (southwestern sector of the Arboledas town, North Santander), porphyritic igneous rocks of rhyodacitic composition have been recognized and dated by zircon U-Pb methods using LA-ICP-MS (Laser Ablation - Inductively Coupled Plasma - Mass Spectrometry) yielding an age of 13.9 ± 0.2 Ma (Langhian; Miocene, Neogene). Petrographic and geochemical data obtained from these rocks indicate that their origin is likely subduction-related, and that they were emplaced in a continental magmatic arc context. The high Sr/Y values (between ~ 44.0 and 94.3) and the absence of marked negative Eu anomalies suggest that the related magmas had high volatile contents, and therefore may have a high potential to form Cu-Au-Mo porphyry mineralization. Considering that the Neogene magmatism has been also reported in the California-Vetas Mining District (located ~40 km to SW of the studied area), where it is known to be related to metallogenic processes, we infer that the magma emplacement could have been facilitated by the high crust permeability generated by NE-trending faults affecting the Santander Massif (e.g. Arboledas-Suratá and Cucutilla faults). Therefore, other areas located along these structures can be considered of great interest for mineral exploration because of the related magmatic-hydrothermal processes

Rumo a um Observatório Latino-Americano do Clima e da Saúde: Seminário sobre Instrumentos e Metodologias

The study of the relationship between health and climate requires articulating various actors and disciplines. This paper presents the experience of the Latin American Seminar on Instruments and Methodologies for a climate and health observatory— held in Buenos Aires in 2019 and supported by the Latin American Center for Interdisciplinary Training (CELFI)—as a linking and training facility referencing the projects that are being carried out in this field throughout Latin American. This paper presents the design, contents, didactic approach and execution of the seminar, as well as its results regarding participation, products and evaluation. Likewise, the methodologies that could allow articulating different disciplines in a process of gainingknowledge about the climate-health relationship are reflected throughout this process. Finally, the main guidelines for this observatory, arising from an exchange with key actors, are set forth herein. The execution of the seminar, the projects presented as the products thereof, the discussions that arose during the exchange, and the need to continue with this work over the following months point out to the importance and necessity of building this observatory for Latin America and the Caribbean in an interdisciplinary way.El estudio de la relación entre clima y salud requiere la articulación de diversos actores y disciplinas. En este artículo se presenta la experiencia del Seminario Latinoamericano Instrumentos y Metodologías para un observatorio de clima y salud, realizado en Buenos Aires en 2019, apoyado por el Centro Latinoamericano de Formación Interdisciplinaria (CELFI), como un espacio de vinculación, capacitación y referencia a experiencias que se vienen desarrollando en este campo en América Latina. En este trabajo se presenta el diseño del seminario, su contenido, didáctica y desarrollo, así como los resultados en cuanto a participación, productos y evaluación. Asimismo, durante el proceso se reflexiona en torno a las metodologías que permitan articular diferentes disciplinas en un proceso de construcción de conocimiento sobre la relación clima-salud. Finalmente, se explicitan los principales lineamientos del observatorio, surgidos de una instancia de intercambio con actores clave. El desarrollo del seminario, los proyectos presentados como producto, las discusiones surgidas durante el intercambio y la continuidad de trabajo en los meses posteriores permiten dar cuenta de la importancia y necesidad de construir interdisciplinariamente este observatorio para América Latina y el Caribe.O estudo da relação entre o clima e a saúde requere a articulação de diversos atores e disciplinas. Neste artigo, apresenta-se a experiência do Seminário Latino-americano Instrumentos e Metodologias para um observatório de clima e saúde, realizado em Buenos Aires em 2019. Foi apoiado pelo Centro Latino-americano de Formação Interdisciplinar (CELFI), como espaço de vinculação, capacitação e referência das experiências que se estão a desenvolver neste campo na América Latina. Neste trabalho, apresenta- se a conceção do seminário, o seu conteúdo, dinâmica e desenvolvimento, bem como, os resultados em termos de participação, produtos e avaliação. Da mesma forma, durante o processo, é feita uma reflexão sobre as metodologias que permitem a articulação de diferentes disciplinas, num processo de construção do conhecimento sobre a relação clima-saúde. Por fim, explicitam-se as principais diretrizes do observatório, decorrentes de uma plataforma de intercâmbio dos atores chave. O desenvolvimento do seminário, os projetos apresentados como produto, as discussões ocorridas durante o intercâmbio e a continuidade de trabalho nos meses seguintes, permitem perceber a importância e a necessidade de construir este observatório interdisciplinar, para a América Latina e Caribe