Professor Rafael Asdrúbal Morales Rivero, an example of dedication

Al decidirnos a realizar esta semblanza, nos apoyamos en el ejemplo que nos ha transmitido el profesor Dr. Rafael Asdrúbal Morales Rivero durante todos estos años como docente de varias asignaturas de la carrera de Estomatología, quien ha contribuido a la formación humanista y patriótica de varios de los egresados, quienes hoy laboran en nuestro país.</p

Actitudes y percepciones de la población de La Habana sobre la COVID-19

Objective: To explore the attitudes and perceptions of the population of Havana about COVID-19. Material and methods: A cross-sectional descriptive study was carried out in a population of 2012 citizens of Havana who, anonymously and voluntarily, answered an online questionnaire distributed on social networks between May and June 2021. Variables on demographic characterization and related to the object of study grouped into causes to which they attribute the current epidemiological situation: social, state and external. The ꭕ2 statistical test and the Corrected Residuals model were used. Results: the participants from the municipalities of “Playa” (14.1%), “Plaza de la Revolución” (13.2%) and “10 de Octubre” (12.7%) were the most predominant. The three predominant causes according to more than 80% of citizens were "Violation of social distancing", "Cracking of social discipline" and "Celebration and festivities". The referred causes related to the state dimension highlighted the violations of social distancing, the opening of airports, and the elimination of active investigations in the community. 43.5% (13,411) of the responses to 14 of the 32 indicated by the respondents are related to the population's low perception of risk. Conclusions: From the perception of the population, it is evident that it is not possible to attribute the epidemiological situation of Havana due to COVID-19 only as a consequence of the low perception of risk in society, this is a multi-causal phenomenon with causes attributed to state action / inaction and social behavior.Objetivo: Explorar sobre las actitudes y percepciones de la población de La Habana sobre la COVID-19. Material y métodos: Se realizó un estudio descriptivo transversal en una población de 2012 ciudadanos habaneros que, de forma anónima y voluntaria, respondieron un cuestionario en línea distribuido en redes sociales entre mayo y junio de 2021. Se emplearon variables sobre la caracterización demográfica y las relacionadas con el objeto de estudio agrupadas en causas a las que atribuyen la situación epidemiológica actual: sociales, estatales y externas. Se utilizó prueba estadística ꭕ2 y modelo de los Residuos Corregidos. Resultados: los participantes de los municipios de Playa (14,1%), Plaza de la revolución (13,2%) y 10 de octubre (12,7%) fueron los más predominantes. Las tres causas predominantes según más del 80% los ciudadanos fueron “Violación del distanciamiento social”, “Resquebrajamiento de la disciplina social” y “Celebración y festividades”. Las causas referidas relacionadas con la dimensión estatal se destacaron las violaciones del distanciamiento social, la apertura de los aeropuertos, y la eliminación de las pesquisas activa en la comunidad. El 43.5% (13,411) de las respuestas a 14 de las 32 señaladas por los encuestados están relacionadas con la baja percepción de riesgo de la población. Conclusiones: Desde la percepción de la población se evidencia que no es posible atribuir la situación epidemiológica de La Habana debido a la COVID-19 solo a consecuencia de la baja percepción de riesgo de la sociedad, este es un fenómeno multicausal con causas atribuidas a la acción/inacción estatal y al comportamiento social

Profesor Rafael Asdrúbal Morales Rivero, ejemplo de dedicación

Al decidirnos a realizar esta semblanza, nos apoyamos en el ejemplo que nos ha transmitido el profesor Dr. Rafael Asdrúbal Morales Rivero durante todos estos años como docente de varias asignaturas de la carrera de Estomatología, quien ha contribuido a la formación humanista y patriótica de varios de los egresados, quienes hoy laboran en nuestro país

Tratamiento endodóntico radical en pulpa no vital en una sola visita

1024x768 Introducción: la Endodoncia durante el último siglo refleja una tendencia a realizar el tratamiento endodóntico radical en dos o más visitas ante los diagnósticos que indican una pulpa no vital. La simplificación del procedimiento en cuanto al número de visitas se refiere fue posible teniendo en cuenta la historia de la enfermedad pulpar. Objetivo: evaluar la efectividad del tratamiento endodóntico radical en pulpa no vital, en una sola visita. Material y métodos: se realizó un estudio descriptivo de corte transversal a una muestra de 171 dientes provenientes de 157 pacientes que acudieron a dos clínicas estomatológicas del municipio Playa, los cuales presentaron diferentes patologías pulpares tributarias al objeto de la investigación; aplicándoseles el tratamiento endodóntico convencional en una sola sesión. Resultados: se obtuvo que el 81.87% de los pacientes tratados evolucionaron de forma asintomática, solo el 18.13% presentó algún signo de periodontitis apical antes de la semana de tratados. Al comparar estos resultados con otros autores se encontró similitud con escasa diferencia porcentual. Conclusiones: el tratamiento endodóntico en una visita para dientes con pulpa no vital es factible de realizar en cualquier patología pulpar, resultando favorable tanto para el operador como para el paciente. Palabras clave: tratamiento endodóntico radical, pulpa no vital, patología pulpar. Normal 0 21 false false false ES X-NONE X-NONE <!--[endif] --

Tratamiento endodóntico radical en pulpa no vital en una sola visita

Introducción: la Endodoncia durante el último siglo refleja una tendencia a realizar el tratamiento endodóntico radical en dos o más visitas ante los diagnósticos que indican una pulpa no vital. La simplificación del procedimiento en cuanto al número de visitas se refiere fue posible teniendo en cuenta la historia de la enfermedad pulpar. Objetivo: evaluar la efectividad del tratamiento endodóntico radical en pulpa no vital, en una sola visita. Material y métodos: se realizó un estudio descriptivo de corte transversal a una muestra de 171 dientes provenientes de 157 pacientes que acudieron a dos clínicas estomatológicas del municipio Playa, los cuales presentaron diferentes patologías pulpares tributarias al objeto de la investigación; aplicándoseles el tratamiento endodóntico convencional en una sola sesión. Resultados: se obtuvo que el 81.87% de los pacientes tratados evolucionaron de forma asintomática, solo el 18.13% presentó algún signo de periodontitis apical antes de la semana de tratados. Al comparar estos resultados con otros autores se encontró similitud con escasa diferencia porcentual. Conclusiones: el tratamiento endodóntico en una visita para dientes con pulpa no vital es factible de realizar en cualquier patología pulpar, resultando favorable tanto para el operador como para el paciente

Elliptic anisotropy measurement of the f0_0(980) hadron in proton-lead collisions and evidence for its quark-antiquark composition

International audienceDespite the f$_0$(980) hadron having been discovered half a century ago, the question about its quark content has not been settled: it might be an ordinary quark-antiquark ($\mathrm{q\bar{q}}$) meson, a tetraquark ($\mathrm{q\bar{q}q\bar{q}}$) exotic state, a kaon-antikaon ($\mathrm{K\bar{K}}$) molecule, or a quark-antiquark-gluon ($\mathrm{q\bar{q}g}$) hybrid. This paper reports strong evidence that the f$_0$(980) state is an ordinary $\mathrm{q\bar{q}}$ meson, inferred from the scaling of elliptic anisotropies ($v_2$) with the number of constituent quarks ($n_\mathrm{q}$), as empirically established using conventional hadrons in relativistic heavy ion collisions. The f$_0$(980) state is reconstructed via its dominant decay channel f$_0$(980) $\to$$\pi^+\pi^-$, in proton-lead collisions recorded by the CMS experiment at the LHC, and its $v_2$ is measured as a function of transverse momentum ($p_\mathrm{T}$). It is found that the $n_q$ = 2 ($\mathrm{q\bar{q}}$ state) hypothesis is favored over $n_q$ = 4 ($\mathrm{q\bar{q}q\bar{q}}$ or $\mathrm{K\bar{K}}$ states) by 7.7, 6.3, or 3.1 standard deviations in the $p_\mathrm{T}$$\lt$ 10, 8, or 6 GeV/$c$ ranges, respectively, and over $n_\mathrm{q}$ = 3 ($\mathrm{q\bar{q}g}$ hybrid state) by 3.5 standard deviations in the $p_\mathrm{T}$$\lt$ 8 GeV/$c$ range. This result represents the first determination of the quark content of the f$_0$(980) state, made possible by using a novel approach, and paves the way for similar studies of other exotic hadron candidates

Extracting the speed of sound in the strongly interacting matter created in ultrarelativistic lead-lead collisions at the LHC

International audienceUltrarelativistic nuclear collisions create a strongly interacting state of hot and dense quark-gluon matter that exhibits a remarkable collective flow behavior with minimal viscous dissipation. To gain deeper insights into its intrinsic nature and fundamental degrees of freedom, we extracted the speed of sound in this medium created using lead-lead (PbPb) collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. The data were recorded by the CMS experiment at the CERN LHC and correspond to an integrated luminosity of 0.607 nb$^{-1}$. The measurement is performed by studying the multiplicity dependence of the average transverse momentum of charged particles emitted in head-on PbPb collisions. Our findings reveal that the speed of sound in this matter is nearly half the speed of light, with a squared value of 0.241 $\pm$ 0.002 (stat) $\pm$ 0.016 (syst) in natural units. The effective medium temperature, estimated using the mean transverse momentum, is 219 $\pm$ 8 (syst) MeV. The measured squared speed of sound at this temperature aligns precisely with predictions from lattice quantum chromodynamic (QCD) calculations. This result provides a stringent constraint on the equation of state of the created medium and direct evidence for a deconfined QCD phase being attained in relativistic nuclear collisions

Search for CPCP violation in D0^0→\to KS0^0_\mathrm{S}KS0^0_\mathrm{S} decays in proton-proton collisions at s\sqrt{s} = 13 TeV

International audienceA search is reported for charge-parity D$^0$$\to$ K$^0_\mathrm{S}$K$^0_\mathrm{S}$$CP$ violation in D$^0$$\to$ K$^0_\mathrm{S}$K$^0_\mathrm{S}$ decays, using data collected in proton-proton collisions at $\sqrt{s}$ = 13 TeV recorded by the CMS experiment in 2018. The analysis uses a dedicated data set that corresponds to an integrated luminosity of 41.6 fb$^{-1}$, which consists of about 10 billion events containing a pair of ẖadrons, nearly all of which decay to charm hadrons. The flavor of the neutral D meson is determined by the pion charge in the reconstructed decays D$^{*+}$$\to$ D$^0\pi^+$ and D$^{*-}$$\to$ D$^0\pi^-$. The D$^0$$\to$ K$^0_\mathrm{S}$K$^0_\mathrm{S}$$CP$ asymmetry in D$^0$$\to$ K$^0_\mathrm{S}$K$^0_\mathrm{S}$ is measured to be $A_{CP}$( K$^0_\mathrm{S}$K$^0_\mathrm{S}$) = (6.2 $\pm$ 3.0 $\pm$ 0.2 $\pm$ 0.8)%, where the three uncertainties represent the statistical uncertainty, the systematic uncertainty, and the uncertainty in the measurement of the D$^0$ $\to$ K$^0_\mathrm{S}$K$^0_\mathrm{S}$ $CP$ asymmetry in the D$^0$ $\to$ K$^0_\mathrm{S}\pi^+\pi^-$ decay. This is the first D$^0$ $\to$ K$^0_\mathrm{S}$K$^0_\mathrm{S}$ $CP$ asymmetry measurement by CMS in the charm sector as well as the first to utilize a fully hadronic final state

Test of lepton flavor universality in B± ⁣→ ⁣K±μ+μ− {\mathrm{B}^{\pm}} \!\to\! \mathrm{K^{\pm}}\mu^{+}\mu^{-} and B± ⁣→ ⁣K±e+e− {\mathrm{B}^{\pm}} \!\to\! \mathrm{K^{\pm}}\mathrm{e}^+\mathrm{e}^- decays in proton-proton collisions at s= \sqrt{s} = 13 TeV

A test of lepton flavor universality in ${\mathrm{B}^{\pm}} \!\to\! \mathrm{K^{\pm}}\mu^{+}\mu^{-}$ and ${\mathrm{B}^{\pm}} \!\to\! \mathrm{K^{\pm}}\mathrm{e}^+\mathrm{e}^-$ decays, as well as a measurement of differential and integrated branching fractions of a nonresonant ${\mathrm{B}^{\pm}} \!\to\! \mathrm{K^{\pm}}\mu^{+}\mu^{-}$ decay are presented. The analysis is made possible by a dedicated data set of proton-proton collisions at $\sqrt{s} =$ 13 TeV recorded in 2018, by the CMS experiment at the LHC, using a special high-rate data stream designed for collecting about 10 billion unbiased b hadron decays. The ratio of the branching fractions $\mathcal{B}({\mathrm{B}^{\pm}} \!\to\! \mathrm{K^{\pm}}\mu^{+}\mu^{-})$ to $\mathcal{B}({\mathrm{B}^{\pm}} \!\to\! \mathrm{K^{\pm}}\mathrm{e}^+\mathrm{e}^-)$ is determined from the measured double ratio $R(\mathrm{K})$ of these decays to the respective branching fractions of the ${\mathrm{B}^{\pm}} \!\to\! {\mathrm{J}/\psi} \mathrm{K^{\pm}}$ with ${\mathrm{J}/\psi} \!\to\!\mu^{+}\mu^{-}$ and $\mathrm{e}^+\mathrm{e}^-$ decays, which allow for significant cancellation of systematic uncertainties. The ratio $R(\mathrm{K})$ is measured in the range 1.1 $< q^2 <$ 6.0 GeV$^2$, where $q$ is the invariant mass of the lepton pair, and is found to be $R(\mathrm{K})=$ 0.78 $^{+0.47}_{-0.23}$, in agreement with the standard model expectation $R(\mathrm{K}) \approx$ 1. This measurement is limited by the statistical precision of the electron channel. The integrated branching fraction in the same $q^2$ range, $\mathcal{B}({\mathrm{B}^{\pm}} \!\to\! \mathrm{K^{\pm}}\mu^{+}\mu^{-}) =$ (12.42 $\pm$ 0.68) $\times$ 10$^{-8}$, is consistent with the present world-average value and has a comparable precision.A test of lepton flavor universality in B$^{\pm}$$\to$ K$^{\pm}\mu^+\mu^-$ and B$^{\pm}$$\to$ K$^{\pm}$e$^+$e$^-$ decays, as well as a measurement of differential and integrated branching fractions of a nonresonant B$^{\pm}$$\to$ K$^{\pm}\mu^+\mu^-$ decay are presented. The analysis is made possible by a dedicated data set of proton-proton collisions at $\sqrt{s}$ = 13 TeV recorded in 2018, by the CMS experiment at the LHC, using a special high-rate data stream designed for collecting about 10 billion unbiased b hadron decays. The ratio of the branching fractions $\mathcal{B}$(B$^{\pm}$$\to$ K$^{\pm}\mu^+\mu^-$) to $\mathcal{B}$(B$^{\pm}$$\to$ K$^{\pm}$e$^+$e$^-$) is determined from the measured double ratio $R$(K) of these decays to the respective branching fractions of the B$^\pm$$\to$ J/$\psi$K$^\pm$ with J/$\psi$$\to$$\mu^+\mu^-$ and e$^+$e$^-$ decays, which allow for significant cancellation of systematic uncertainties. The ratio $R$(K) is measured in the range 1.1 $\lt q^2 \lt$ 6.0 GeV$^2$, where $q$ is the invariant mass of the lepton pair, and is found to be $R$(K) = 0.78$^{+0.47}_{-0.23}$, in agreement with the standard model expectation $R$(K) $\approx$ 1. This measurement is limited by the statistical precision of the electron channel. The integrated branching fraction in the same $q^2$ range, $\mathcal{B}$(B$^{\pm}$$\to$ K$^{\pm}\mu^+\mu^-$) = (12.42 $\pm$ 0.68) $\times$ 10$^{-8}$, is consistent with the present world-average value and has a comparable precision

Observation of the Ξb−\Xi^-_\mathrm{b}→\toψ\psi(2S)Ξ−\Xi^- decay and studies of the Ξb∗0\Xi_\mathrm{b}^{\ast{}0} baryon in proton-proton collisions at s\sqrt{s} = 13 TeV

International audienceThe first observation of the decay $\Xi^-_\mathrm{b}$$\to$$\psi$(2S)$\Xi^-$ and measurement of the branching ratio of $\Xi^-_\mathrm{b}$$\to$$\psi$(2S)$\Xi^-$ to $\Xi^-_\mathrm{b}$$\to$ J/$\psi$$\Xi^-$ are presented. The J/$\psi$ and $\psi$(2S) mesons are reconstructed using their dimuon decay modes. The results are based on proton-proton colliding beam data from the LHC collected by the CMS experiment at $\sqrt{s}$ = 13 TeV in 2016-2018, corresponding to an integrated luminosity of 140 fb$^{-1}$. The branching fraction ratio is measured to be $\mathcal{B}$($\Xi^-_\mathrm{b}$$\to$$\psi$(2S)$\Xi^-$)/$\mathcal{B}$($\Xi^-_\mathrm{b}$$\to$ J/$\psi$$\Xi^-$) = 0.84$^{+0.21}_{-0.19}$ (stat) $\pm$ 0.10 (syst) $\pm$ 0.02 ($\mathcal{B}$), where the last uncertainty comes from the uncertainties in the branching fractions of the charmonium states. New measurements of the $\Xi_\mathrm{b}^{\ast{}0}$ baryon mass and natural width are also presented, using the $\Xi_\mathrm{b}^-\pi^+$ final state, where the $\Xi^-_\mathrm{b}$ baryon is reconstructed through the decays J/$\psi \Xi^-$, $\psi$(2S)$\Xi^-$, J/$\psi \Lambda$K$^-$, and J/$\psi \Sigma^0$K$^-$. Finally, the fraction of the $\Xi^-_\mathrm{b}$ baryons produced from $\Xi_\mathrm{b}^{\ast{}0}$ decays is determined