Probing the spin-parity of the Higgs boson via jet kinematics in vector boson fusion

Determining the spin and the parity quantum numbers of the recently discovered Higgs-like boson at the LHC is a matter of great importance. In this paper, we consider the possibility of using the kinematics of the tagging jets in Higgs production via the vector boson fusion (VBF) process to test the tensor structure of the Higgs-vector boson ($HVV$) interaction and to determine the spin and CP properties of the observed resonance. We show that an anomalous $HVV$ vertex, in particular its explicit momentum dependence, drastically affects the rapidity between the two scattered quarks and their transverse momenta and, hence, the acceptance of the kinematical cuts that allow to select the VBF topology. The sensitivity of these observables to different spin-parity assignments, including the dependence on the LHC center of mass energy, are evaluated. In addition, we show that in associated Higgs production with a vector boson some kinematical variables, such as the invariant mass of the system and the transverse momenta of the two bosons and their separation in rapidity, are also sensitive to the spin--parity assignments of the Higgs--like boson.Comment: 15 pages, 5 figure

Azimuthal Angle Probe of Anomalous HWW Couplings at the LHeC

A high energy ep collider, such as the proposed LHeC, possesses the unique facility of permitting direct measurement of the HWW coupling without contamination from the HZZ coupling. At such a machine, the fusion of two W bosons through the HWW vertex would give rise to typical charged current (CC) events accompanied by a Higgs boson. We demonstrate that azimuthal angle correlations between the observable CC final states could then be a sensitive probe of the nature of the HWW vertex and hence of the CP properties of the Higgs boson.Comment: Revised version to appear in Physical Review Letters, some typos and mis-labellings corrected, references reorganised and update

Normalizing Weak Boson Pair Production at the Large Hadron Collider

The production of two weak bosons at the Large Hadron Collider will be one of the most important sources of SM backgrounds for final states with multiple leptons. In this paper we consider several quantities that can help normalize the production of weak boson pairs. Ratios of inclusive cross-sections for production of two weak bosons and Drell-Yan are investigated and the corresponding theoretical errors are evaluated. The possibility of predicting the jet veto survival probability of VV production from Drell-Yan data is also considered. Overall, the theoretical errors on all quantities remain less than 5-20%. The dependence of these quantities on the center of mass energy of the proton-proton collision is also studied.Comment: 11 pages; added references, minor text revisions, version to appear in Phys. Rev.

A comparative study of the electrochemical properties of vitamin B-6 related compounds at physiological pH

A comparative study of vitamin B6 group and related compounds in buffered solutions using electrochemical techniques has been performed at neutral pH. Irreversible bi- or tetra-electronic processes are observed for these substances, and the electron transfer coefficient (αn) calculated. It was concluded that either the first or second electron transfer were the rate determining step of the electrode process. The diffusion coefficient of these substances was calculated and the values given follow an inverse tendency to the molecular size. For aldehydes the values obtained were corrected of the hydration reaction. It is important to remark that catalytic waves were reported for the first time for these compounds. Using a model involving the nitrogen of the basic structure the kinetic constants were calculated for most of them

The role of cognitive individual differences in digital versus pen-and-paper writing

It is unknown whether and to what extent cognitive individual differences may play different roles in paper versus computer-based second language (L2) writing. This exploratory study is a first attempt to explore this issue, focusing on the effects of working memory and language aptitude on the quality of paper versus computer-based L2 writing performance. Forty-two Spanish learners of L2 English performed a problem-solving task either digitally or on paper, took a working memory n-back test, and completed LLAMA tests to measure language aptitude. The quality of their L2 written texts was assessed in terms of complexity, accuracy and fluency (CAF) measures. The results indicated that the role of cognitive individual differences may vary depending on the writing environment

Estimating turbulence kinetic energy dissipation rates in numerically simulated stratocumulus cloud-top and convective boundary layer flow: Evaluation of different methods.

We perform analysis of direct numerical simulation (DNS) data of two flow cases: stratocumulus cloud-top (SCT) and convective boundary layer (CBL). We test different methods for turbulence kinetic energy dissipation rate (EDR) retrieval. Among others we investigate performance of a new, iterative method, proposed recently in Wacławczyk et al. (2017), where an analytical model for energy spectra in the dissipative range is needed. We argue, the new method has some advantages over the standard spectral retrieval techniques. To apply it, only the information on the signals’ cut-off wavelength is needed and it is not necessary to define the fitting range in the inertial part of the spectrum. With this, the new method could be a basis of a general algorithm for EDR retrieval, applicable to a wide range of different atmospheric data (e.g. from commercial aircrafts). Moreover, we investigate how the presence of anisotropy due to shear, buoyancy and external intermittency in the flow affects the EDR retrieval based on the classical K41 for isotropic turbulence (Kolmogorov, 1941). © 2019 International Symposium on Turbulence and Shear Flow Phenomena, TSFP. All rights reserved

La dimensión afectiva olvidada del conocimiento didáctico del contenido de los profesores de ciencias

Shulman se refería al paradigma olvidado de la investigación sobre el profesor el que no se hubiese considerado el contenido de la materia específica, lo que le llevó a desarrollar el Conocimiento Didáctico del Contenido (CDC). Sin embargo la dimensión afectiva y emocional podemos considerarla la parte olvidada del CDC. Shulman consideraba que el CDC es una forma de razonamiento y de acción didáctica por medio de la cual los profesores transforman el contenido en representaciones comprensibles a los estudiantes. Investigaciones recientes indican que no hay acción humana, sin una emoción que la haga posible. Desde esta perspectiva es indudable que las emociones del profesor formarían parte del CDC. En el simposio mostraremos la relación entre lo cognitivo y lo afectivo del profesor y la necesidad de incluir la dimensión afectiva en el CDC de los profesores de ciencias

The numeric-vectorial component for analysing the infinite limit of a sequence in preservice teachers

This article studies how preservice teachers consider the concept of the infinite limit of a sequence in relation totheir future teaching practice through the numeric-vectorial component. During the research, 27 prospective secondaryeducation and Baccalaureate (secondary school)-level teachers were organised into groups and were asked to debate differentfragments setting out the above-mentioned limit that had been extracted from textbooks from different publishers. In theanalysis, phenomenology was considered in the sense defined by Freudenthal, from two possible approaches—intuitive andformal, and by applying four systems of representation: verbal, tabular, graphic, and symbolic; in addition, Elementary andAdvanced Mathematical Thinking levels were considered in order to classify the phenomena chosen. Based on this analysis,we were able to determine five individual and three group level phenomenological profiles. We have used these data to offersome insights into teaching and learning of the infinite limit of a sequence from the perspective of prospective teachers