Desigualdades sociodemográficas e na assistência à maternidade entre puérperas no Sudeste do Brasil segundo cor da pele: dados do inquérito nacional Nascer no Brasil (2011-2012)

Historically, in Brazil, the health indicators of mothers and babies by skin color show an unfavorable picture to black and brown-skinned women. In the last decade, the reduction of disparities in income and education, as well as the universalization of health care, may have altered this situation to some extent. The objective of this study was to analyze the changes in socio-demographic inequalities and maternity care in Southeastern Brazil, by race/color, in the last decade. We used data from the national survey Born in Brazil (2011-2012). Descriptive statistical analysis was performed in order to define socio-demographic characteristics, access to antenatal care, clinical and obstetric history, and characteristics of birth assistance. We found differences unfavorable to black and brown-skinned women in education, income, and paid work; white women had more private health insurance plans, and increased age. Black and brown women had fewer medical appointments, fewer ultrasounds, more antenatal care considered inadequate, higher parity, and more hypertensive disorders. In childbirth, they had fewer companions and more vaginal deliveries, although the cesarean rate has grown twice as high among black women. More often they went into labor and had children born full term. There was no statistically significant difference in marital status, pregnancy complications, diabetes mellitus, anemia, syphilis, HIV, pilgrimage to delivery, neonatal or maternal near miss, and most of the interventions in vaginal delivery. Although major disparities persist, there was some reduction in sociodemographic differences as well as increased access to both appropriate and unnecessary and potentially harmful interventions.Historicamente, no Brasil, os indicadores de saúde de mães e bebês segundo cor da pele mostram quadro desfavorável às negras (pretas e pardas). Na última década, a redução das disparidades de renda e escolaridade, assim como a universalização da assistência à saúde, podem ter alterado esse quadro, em alguma medida. O objetivo deste artigo foi analisar as mudanças nas desigualdades sociodemográficas e na assistência à maternidade no Sudeste do Brasil, segundo raça/cor, na última década. Utilizamos dados do inquérito nacional Nascer no Brasil (2011-2012). Análise estatística descritiva foi realizada para a caracterização sociodemográfica, do acesso à assistência pré-natal, antecedentes clínicos e obstétricos, e características da assistência ao parto. Encontramos diferenças desfavoráveis às pretas e pardas quanto à escolaridade, renda e ao trabalho remunerado; as brancas tinham mais planos de saúde privados e maior idade. As pretas e pardas tiveram menor número de consultas, menos ultrassonografias, mais cuidado pré-natal considerado inadequado, maior paridade e mais síndromes hipertensivas. No parto, tiveram menos acompanhantes, mais partos vaginais, embora a cesárea tenha dobrado entre as negras, que com mais frequência entraram em trabalho de parto e tiveram filhos nascidos de termo pleno. Não houve diferença estatisticamente significativa quanto à situação conjugal, intercorrências da gestação, diabetes mellitus, anemias, sífilis, HIV, peregrinação para o parto, near miss materno ou neonatal e na maioria das intervenções no parto vaginal. Ainda que importantes disparidades persistam, houve alguma redução das diferenças sociodemográficas e um aumento do acesso, tanto a intervenções adequadas quanto às desnecessárias e potencialmente danosas

Opposite-side flavour tagging of B mesons at the LHCb experiment

The calibration and performance of the oppositeside flavour tagging algorithms used for the measurements of time-dependent asymmetries at the LHCb experiment are described. The algorithms have been developed using simulated events and optimized and calibrated with B + →J/ψK +, B0 →J/ψK ∗0 and B0 →D ∗− μ + νμ decay modes with 0.37 fb−1 of data collected in pp collisions at √ s = 7 TeV during the 2011 physics run. The oppositeside tagging power is determined in the B + → J/ψK + channel to be (2.10 ± 0.08 ± 0.24) %, where the first uncertainty is statistical and the second is systematic

Measurement of the Bs0→J/ψKS0B_s^0\to J/\psi K_S^0 branching fraction

The $B_s^0\to J/\psi K_S^0$ branching fraction is measured in a data sample corresponding to 0.41$fb^{-1}$ of integrated luminosity collected with the LHCb detector at the LHC. This channel is sensitive to the penguin contributions affecting the sin2$\beta$ measurement from $B^0\to J/\psi K_S^0$ The time-integrated branching fraction is measured to be $BF(B_s^0\to J/\psi K_S^0)=(1.83\pm0.28)\times10^{-5}$. This is the most precise measurement to date

Measurement of the CP-violating phase \phi s in Bs->J/\psi\pi+\pi- decays

Measurement of the mixing-induced CP-violating phase phi_s in Bs decays is of prime importance in probing new physics. Here 7421 +/- 105 signal events from the dominantly CP-odd final state J/\psi pi+ pi- are selected in 1/fb of pp collision data collected at sqrt{s} = 7 TeV with the LHCb detector. A time-dependent fit to the data yields a value of phi_s=-0.019^{+0.173+0.004}_{-0.174-0.003} rad, consistent with the Standard Model expectation. No evidence of direct CP violation is found.Comment: 15 pages, 10 figures; minor revisions on May 23, 201

Measurement of the CP-violating phase phi_s in the decay Bs->J/psi phi

We present a measurement of the time-dependent CP-violating asymmetry in B_s -> J/psi phi decays, using data collected with the LHCb detector at the LHC. The decay time distribution of B_s -> J/psi phi is characterized by the decay widths Gamma_H and Gamma_L of the heavy and light mass eigenstates of the B_s-B_s-bar system and by a CP-violating phase phi_s. In a sample of about 8500 B_s -> J/psi phi events isolated from 0.37 fb^-1 of pp collisions at sqrt(s)=7 TeV we measure phi_s = 0.15 +/- 0.18 (stat) +/- 0.06 (syst) rad. We also find an average B_s decay width Gamma_s == (Gamma_L + Gamma_H)/2 = 0.657 +/- 0.009 (stat) +/- 0.008 (syst) ps^-1 and a decay width difference Delta Gamma_s == Gamma_L - Gamma_H} = 0.123 +/- 0.029 (stat) +/- 0.011 (syst) ps^-1. Our measurement is insensitive to the transformation (phi_s,DeltaGamma_s --> pi - phi_s, - Delta Gamma_s.Comment: 9 pages, 3 figure

Search for CP violation in D+→K−K+π+D^{+} \to K^{-}K^{+}\pi^{+} decays

A model-independent search for direct CP violation in the Cabibbo suppressed decay $D^+ \to K^- K^+\pi^+$ in a sample of approximately 370,000 decays is carried out. The data were collected by the LHCb experiment in 2010 and correspond to an integrated luminosity of 35 pb$^{-1}$. The normalized Dalitz plot distributions for $D^+$ and $D^-$ are compared using four different binning schemes that are sensitive to different manifestations of CP violation. No evidence for CP asymmetry is found.Comment: 13 pages, 8 figures, submitted to Phys. Rev.