Observation of an Excited Bc+ State

Using pp collision data corresponding to an integrated luminosity of 8.5 fb-1 recorded by the LHCb experiment at center-of-mass energies of s=7, 8, and 13 TeV, the observation of an excited Bc+ state in the Bc+π+π- invariant-mass spectrum is reported. The observed peak has a mass of 6841.2±0.6(stat)±0.1(syst)±0.8(Bc+) MeV/c2, where the last uncertainty is due to the limited knowledge of the Bc+ mass. It is consistent with expectations of the Bc∗(2S31)+ state reconstructed without the low-energy photon from the Bc∗(1S31)+→Bc+γ decay following Bc∗(2S31)+→Bc∗(1S31)+π+π-. A second state is seen with a global (local) statistical significance of 2.2σ (3.2σ) and a mass of 6872.1±1.3(stat)±0.1(syst)±0.8(Bc+) MeV/c2, and is consistent with the Bc(2S10)+ state. These mass measurements are the most precise to date

Measurement of the inelastic pp cross-section at a centre-of-mass energy of 13TeV

The cross-section for inelastic proton-proton collisions at a centre-of-mass energy of 13TeV is measured with the LHCb detector. The fiducial cross-section for inelastic interactions producing at least one prompt long-lived charged particle with momentum p > 2 GeV/c in the pseudorapidity range 2 < η < 5 is determined to be ϭ acc = 62:2 ± 0:2 ± 2:5mb. The first uncertainty is the intrinsic systematic uncertainty of the measurement, the second is due to the uncertainty on the integrated luminosity. The statistical uncertainty is negligible. Extrapolation to full phase space yields the total inelastic proton-proton cross-section ϭ inel = 75:4 ± 3:0 ± 4:5mb, where the first uncertainty is experimental and the second due to the extrapolation. An updated value of the inelastic cross-section at a centre-of-mass energy of 7TeV is also reported

LA COMUNICACIÓN EDUCATIVA Y EL DESARROLLO DE LA DIMENSIÓN SOCIO AFECTIVA DE LA PERSONALIDAD: Nuevos Retos a la Educación Social

La educación de la personalidad impone conocer y consideraraquellas estructuras psicológicas que constituyen resortes deldesarrollo en un momento dado, presupuesto que gana especialsentido cuando se trata de la estimulación del desarrollo de ladimensión socioafectiva de la personalidad. Sobre esta base sedebe organizar el proceso educativo como comunicación queinvolucre aquellos recursos del sujeto (de la personalidad y delgrupo) y del contexto (ámbitos socioeducativos significativos)que participan de la regulación consciente e intencional de lasinteracciones sociales. Este proceder exige de la formación habilidades específicas en los educadores, rescatando elprotagonismo, la iniciativa y la creatividad de los participantes

Virtual Reality for Teacher Training : An Experiential Approach to Classroom Conflict Management

This chapter discusses the use of virtual reality (VR) in the training of preservice secondary education teachers in Spain as an integral part of their learning process. The authors propose some premises from which to design a training program to improve preservice teachers' communicative competence and their ability to manage conflict impacting the classroom climate. First, it explains the experiential and experimental potential of a virtual learning environment (VLE), its ability to create personalized virtual worlds, as well as the possibility to generate insightful instant feedback and feedforward. Finally, an example of a prototype scenario designed on this conceptual basis is provided. Furthermore, the chapter presents an overview of an educational proposal to implement this experiential immersive opportunity for preservice teachers to interact and manage disruptive situations in a safe and reliable environment conducive to the development of key communicative competences and strategies to turn conflict into a learning opportunity

Observation of D⁰ Meson Decays to Π⁺π⁻μ⁺μ⁻ and K⁺K⁻μ⁺μ⁻ Final States

The first observation of the D⁰→π⁺π⁻μ⁺μ⁻ and D⁰→K⁺K⁻μ⁺μ⁻ decays is reported using a sample of proton-proton collisions collected by LHCb at a center-of-mass energy of 8 TeV, and corresponding to 2  fb⁻¹ of integrated luminosity. The corresponding branching fractions are measured using as normalization the decay D⁰→K⁻π⁺[μ⁺μ⁻][subscript ρ⁰/ω], where the two muons are consistent with coming from the decay of a ρ⁰ or ω meson. The results are B(D⁰→π⁺π⁻μ⁺μ⁻)=(9.64±0.48±0.51±0.97)×10⁻⁷ and B(D⁰→K⁺K⁻μ⁺μ⁻)=(1.54±0.27±0.09±0.16)×10⁻⁷, where the uncertainties are statistical, systematic, and due to the limited knowledge of the normalization branching fraction. The dependence of the branching fraction on the dimuon mass is also investigated

Cloud Computing: A Systematic Literature Review and Future Agenda

Global competition has extended the scope of trade and extended the supply chains causing information management to be an essential part of business. Many new technologies have recently been adapted by organizations in the era of digitalization. Cloud computing has an important place in these technologies and has been integrated widely. In recent days, unexpected and risky periods such as the global pandemic increased the interest towards cloud computing both academically and practically. The purpose of this study is to analyze and classify the contributions of the studies published in the cloud computing field. The cloud literature is analyzed systematically from the management and business points of view. The review is limited to journal articles and papers published between 2014 and 2019. This research summarizes the current research attempts, discovers the research gaps, and provides a research agenda for future research on cloud computing within the context of information management in business and management from a global perspective

Competencia comunicativa intercultural: prácticas docentes inclusivas en contextos educativos de diversidad cultural y lingüística en Cataluña

This study aims at identifying pedagogical practices that demonstrate the intercultural communicative competence (ICC) of kindergarten and primary school teachers, who have worked in vulnerable educational contexts during the COVID-19 pandemic lockdown. A multiple case study was conducted with two public schools in Catalonia.  In-depth semi-structured interviews were conducted with schools management teams (n=2), as well as with families (n=2); and a focus group was held with the teaching staff (n=18) for data collection. Thematic analysis in ATLAS.ti v9 revealed four key themes: personalizing teaching and understanding diversity, building an inclusive school culture, using technological and digital tools, and building positive relationships. It is proposed that a contextualized and planned training specifically oriented towards the development of ICC could be an appropriate and timely tool to address the needs of a culturally and linguistically diverse multicultural school.El objetivo de este estudio fue explorar prácticas educativas que evidenciaran la competencia comunicativa intercultural (CCI) del profesorado de infantil y primaria que había trabajado en contextos educativos vulnerables en el marco del confinamiento por la pandemia de COVID-19. Se realizó una investigación de caso múltiple en la que participaron dos escuelas públicas de Cataluña a partir de entrevistas semiestructuradas en profundidad a equipos directivos (n=2) y familias (n=2) y un grupo focal al profesorado (n=18). El análisis temático en ATLAS.ti v9 reveló cuatro temas clave: personalización de la enseñanza y comprensión de la diversidad, construcción de una cultura escolar inclusiva, uso de herramientas tecnológicas y digitales, y construcción de relaciones positivas. De acuerdo con esto, se plantea que una formación contextualizada y planificada, orientada específicamente hacia el desarrollo de la CCI, puede ser una herramienta adecuada y oportuna para abordar las necesidades de una escuela multicultural y lingüísticamente diversa

Updated Determination of D⁰–D¯⁰Mixing and CP Violation Parameters with D⁰→K⁺π⁻ Decays

We report measurements of charm-mixing parameters based on the decay-time-dependent ratio of D⁰→K⁺π⁻ to D⁰→K⁻π⁺ rates. The analysis uses a data sample of proton-proton collisions corresponding to an integrated luminosity of 5.0  fb⁻¹ recorded by the LHCb experiment from 2011 through 2016. Assuming charge-parity (CP) symmetry, the mixing parameters are determined to be x′²=(3.9±2.7)×10⁻⁵, y′=(5.28±0.52)×10⁻³, and R[subscript D]=(3.454±0.031)×10⁻³. Without this assumption, the measurement is performed separately for D⁰ and D[over ¯]⁰ mesons, yielding a direct CP-violating asymmetry A[subscript D]=(-0.1±9.1)×10⁻³, and magnitude of the ratio of mixing parameters 1.00<|q/p|<1.35 at the 68.3% confidence level. All results include statistical and systematic uncertainties and improve significantly upon previous single-measurement determinations. No evidence for CP violation in charm mixing is observed

Measurement of CP observables in B± → D(⁎)K± and B± → D(⁎)π± decays

Measurements of CP observables in B ± →D (⁎) K ± and B ± →D (⁎) π ± decays are presented, where D (⁎) indicates a neutral D or D ⁎ meson that is an admixture of D (⁎)0 and D¯ (⁎)0 states. Decays of the D ⁎ meson to the Dπ 0 and Dγ final states are partially reconstructed without inclusion of the neutral pion or photon, resulting in distinctive shapes in the B candidate invariant mass distribution. Decays of the D meson are fully reconstructed in the K ± π ∓ , K + K − and π + π − final states. The analysis uses a sample of charged B mesons produced in pp collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 2.0, 1.0 and 2.0 fb −1 taken at centre-of-mass energies of s=7, 8 and 13 TeV, respectively. The study of B ± →D ⁎ K ± and B ± →D ⁎ π ± decays using a partial reconstruction method is the first of its kind, while the measurement of B ± →DK ± and B ± →Dπ ± decays is an update of previous LHCb measurements. The B ± →DK ± results are the most precise to date