2,290 research outputs found
Anomalous quartic couplings in collisions at the LHeC and the FCC-he
We conducted a study on measuring production and on the sensitivity
limits at Confidence Level on thirteen anomalous couplings obtained by
dimension-8 operators which are related to the anomalous quartic
couplings. We consider the main reaction with the sub-process at
the Large Hadron electron Collider (LHeC) and the Future Circular
Collider-hadron electron (FCC-he). For the LHeC, energies of the beams
are taken to be and 140 GeV and the energy of the beams is taken
to be TeV. For the FCC-he, energies of the beams are taken to
be and 140 GeV and the energy of the beams is taken to be TeV, respectively. It is interesting to notice that the LHeC and the FCC-he
will lead to model-independent limits on the anomalous quartic
couplings which are one order of magnitude stringent than the CMS Collaboration
limits, in addition to being competitive with other limits reported in the
literature.Comment: 28 pages, 10 Figures and 13 Table
Chiral Mono- and α-Diimines and Their Pd(II) Complexes with Anticancer Activity
The aim of this review is to provide mainly an outlook of the synthesis and characterization of chiral mono- and α-diimines ligands and their Pd(II) complexes carried out in our group in the last few years. Some other issues with simple chiral imines synthesized in our lab are also outlined. The report includes details about their versatile coordination patterns, biological activity in cancer cell lines, and engaging properties in different fields, such as materials science
New Approaches for Teaching Soil and Rock Mechanics Using Information and Communication Technologies
Soil and rock mechanics are disciplines with a strong conceptual and methodological basis. Initially, when engineering students study these subjects, they have to understand new theoretical phenomena, which are explained through mathematical and/or physical laws (e.g. consolidation process, water flow through a porous media). In addition to the study of these phenomena, students have to learn how to carry out estimations of soil and rock parameters in laboratories according to standard tests. Nowadays, information and communication technologies (ICTs) provide a unique opportunity to improve the learning process of students studying the aforementioned subjects. In this paper, we describe our experience of the incorporation of ICTs into the classical teaching-learning process of soil and rock mechanics and explain in detail how we have successfully developed various initiatives which, in summary, are: (a) implementation of an online social networking and microblogging service (using Twitter) for gradually sending key concepts to students throughout the semester (gradual learning); (b) detailed online virtual laboratory tests for a delocalized development of lab practices (self-learning); (c) integration of different complementary learning resources (e.g. videos, free software, technical regulations, etc.) using an open webpage. The complementary use to the classical teaching-learning process of these ICT resources has been highly satisfactory for students, who have positively evaluated this new approach.This work has been developed in the framework of the RECLAND Project. It has been funded by the European Union under Lifelong Learning Programme, Erasmus Programme: Erasmus Multilateral Projects, 526746-LLP-1-2012-1-ES-ERASMUS-EMCR, MSc Programme in Climate Change and Restoration of Degraded Land
Limits on the Electromagnetic and Weak Dipole Moments of the Tau-Lepton in E_6 Superstring Models
We obtain limits on the electromagnetic and weak dipole moments of the
tau-lepton in the framework of a Left-Right symmetric model (LRSM) and a class
of inspired models with an additional neutral vector boson .
Using as an input the data obtained by the L3 and OPAL Collaborations for the
reaction , we get a stringent limit on the LRSM
mixing angle , , which in
turn induces bounds on the tau weak dipole moments which are consistent with
the bounds obtained recently by the DELPHI and ALEPH Collaborations from the
reaction . We also get similar bounds for the weak
dipole moments of the tau lepton in the framework of superstring models.Comment: 18 pages, 5 figure
Study of the projected sensitivity on the anomalous quartic gauge couplings via production at the CLIC
Gauge boson self-couplings are completely defined by the non-Abelian gauge
symmetry of the Standard Model (SM), thus direct search for these couplings are
extremely significant in understanding the gauge structure of the SM. The
possible deviation from the SM predictions of gauge boson self-couplings would
be a sign of the presence of new physics beyond the SM. In this work, we study
the sensitivities on the anomalous couplings defined by dimension-8 operators
related to the and quartic vertices
through the process with Z-boson decaying to charged
leptons at the Compact Linear Collider (CLIC). We analyze the center-of-mass
energy of 3 TeV, integrated luminosities of ,
systematic uncertainties of , and unpolarized and
polarized electron beams for extraction of expected sensitivity on the
anomalous couplings at confidence level, which are
especially sensitive to the channel. It is clear from the
results that if the systematic error is improved, we expect better limits on
the couplings. The best limits obtained on the anomalous quartic couplings for
the process with TeV,
and can be approximately improved up to about
two times better than the limits obtained with . Our
sensitivities on the anomalous quartic couplings with can
set more stringent sensitivity by two orders of magnitude concerning the best
sensitivity derived from the current experimental limits. Finally, with initial
electron beam polarization, the sensitivity of the anomalous quartic couplings
improves by almost a factor of 1.2.Comment: 38 pages, 22 figure
Flavor-changing top quark rare decays in the Bestest Little Higgs Model
This paper investigates the effects of parameters in the Bestest Little Higgs
Model (BLHM) on rare flavor-changing decays of the top quark. As a result,
flavor-changing phenomena are introduced in the BLHM for the first time. In
this study, we incorporate new flavor mixing terms between the light quarks of
the Standard Model (SM) and the fermions and bosons of the BLHM. We compute the
one-loop contributions from the heavy quark and the heavy bosons
. Our findings demonstrate
that the branching ratios of decays and , where
and , exhibit improvements compared to their counterparts in
the SM, except for the gluon case. Moreover, we observe that the processes with
higher sensitivity are , and within the appropriate parameter
space.Comment: 13 pages and 10 figure
Propiedades de las rocas volcánicas de Canarias (España) utilizadas como material de escollera
In the Canary Islands, there is a wide spectrum of volcanic rocks with different properties to be used in public works. The aim of this study is to analyse the physical-mechanical properties of all the volcanic rocks present in the Canary Island archipelago in order to determine their suitability for use in maritime construction works. The great variety of volcanic rocks present on the islands have been grouped into lithotypes based on similar geo-mechanical behaviour. The laboratory test results obtained for these lithotypes establish their suitability or not to be used as breakwater material in accordance with Spanish regulations.En el archipiélago canario existe un amplio espectro de rocas volcánicas con diferentes propiedades para ser utilizadas en obras públicas. El objetivo de este estudio es analizar las propiedades físico-mecánicas de todas las rocas volcánicas presentes en el archipiélago canario con el fin de determinar su idoneidad para ser utilizadas en obras de construcción marítima. La gran variedad de rocas volcánicas presentes en las islas, se han agrupado en litotipos basados en un comportamiento geomecánico similar. Los resultados de los ensayos de laboratorio obtenidos para estos litotipos establecen su idoneidad o no para ser utilizados como material de escollera de acuerdo con la normativa española
Study on the anomalous quartic couplings of electroweak bosons in collisions at the LHeC and the FCC-he
In this paper, a study is carried out on the production to probe quartic couplings
using 10, 100 of collisions data at = 1.30,
1.98 GeV at the Large Hadron electron Collider (LHeC) and 100, 1000 with = 3.46, 5.29 GeV at the Future Circular
Collider-hadron electron (FCC-he). Production cross-sections are determined for
both at leptonic and hadronic decay channel of the -boson. With the data
from future colliders, it is possible to obtain sensitivity measures at
C.L. on the anomalous and
couplings which are competitive with the limits obtained by the LHC, as well as
with others limits reported in the literature. The production mode in collisions offers a window for
study the quartic electroweak bosons couplings at the LHeC
and the FCC-he, which provides a much cleaner collision environment than the
LHC.Comment: 27 pages , 10 figure
Reflexiones sobre la integración de programas bilingües en los estudios de ingeniería
Un 80 % de las ofertas de trabajo en el sector de la ingeniería requieren un amplio conocimiento de una lengua extranjera, principalmente el inglés. En ocasiones este requisito se valora más que el expediente académico. Un grado bilingüe es aquel que se ha estudiado, totalmente o en parte, en otro idioma. Cada vez son más los estudios de ingeniería que integran, gradualmente, la impartición de asignaturas en el formato bilingüe, adoptando como segundo idioma, el inglés. Las ventajas que ofrece esta opción a los futuros egresados son notables. A esto se suma, que cada vez un número mayor de estudiantes, realiza programas de intercambio con otras universidades europeas, esto ha sido potenciado por la creación de convenios y dobles titulaciones. No obstante, en todo este proceso se detectan unas carencias e impedimentos para poder integrar masivamente los programas bilingües y sus ventajas. El presente artículo estudia algunas iniciativas de implantación de estos programas, problemas detectados y las lecciones aprendidas
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