Síndrome de Fiebre Severa con Trombocitopenia como Problema de Salud Pública Emergente

La trombocitopenia, como la fiebre y la anemia, son signos que en todos los casos debe aclararse su etiología, estos en su mayoría, suelen estar asociados a enfermedades infecciosas, especialmente tropicales y zoonóticas. La primera se presenta por falta de producción o por aumento en la destrucción de las plaquetas. Las plaquetas son células extremadamente importantes para los organismos vertebrados, pues son ellas las que previenen e interrumpen las hemorragias, actuando en la formación de coágulos y participando en la coagulación sanguínea. En años pasados se ha descrito un síndrome, de etiología viral, que recibe el nombre de Síndrome de Trombocitopenia con Fiebre Severa (SFTS). El Síndrome de Trombocitopenia con Fiebre Severa es una enfermedad infecciosa transmitida por garrapatas (arbovirus), con una alta tasa de letalidad

Síndrome de Fiebre Severa con Trombocitopenia como Problema de Salud Pública Emergente

La trombocitopenia, como la fiebre y la anemia, son signos que en todos los casos debe aclararse su etiología, estos en su mayoría, suelen estar asociados a enfermedades infecciosas, especialmente tropicales y zoonóticas. La primera se presenta por falta de producción o por aumento en la destrucción de las plaquetas. Las plaquetas son células extremadamente importantes para los organismos vertebrados, pues son ellas las que previenen e interrumpen las hemorragias, actuando en la formación de coágulos y participando en la coagulación sanguínea. En años pasados se ha descrito un síndrome, de etiología viral, que recibe el nombre de Síndrome de Trombocitopenia con Fiebre Severa (SFTS). El Síndrome de Trombocitopenia con Fiebre Severa es una enfermedad infecciosa transmitida por garrapatas (arbovirus), con una alta tasa de letalidad

Search for the standard model Higgs boson in the H to ZZ to 2l 2nu channel in pp collisions at sqrt(s) = 7 TeV

A search for the standard model Higgs boson in the H to ZZ to 2l 2nu decay channel, where l = e or mu, in pp collisions at a center-of-mass energy of 7 TeV is presented. The data were collected at the LHC, with the CMS detector, and correspond to an integrated luminosity of 4.6 inverse femtobarns. No significant excess is observed above the background expectation, and upper limits are set on the Higgs boson production cross section. The presence of the standard model Higgs boson with a mass in the 270-440 GeV range is excluded at 95% confidence level.Comment: Submitted to JHE

Search for New Physics with Jets and Missing Transverse Momentum in pp collisions at sqrt(s) = 7 TeV

A search for new physics is presented based on an event signature of at least three jets accompanied by large missing transverse momentum, using a data sample corresponding to an integrated luminosity of 36 inverse picobarns collected in proton--proton collisions at sqrt(s)=7 TeV with the CMS detector at the LHC. No excess of events is observed above the expected standard model backgrounds, which are all estimated from the data. Exclusion limits are presented for the constrained minimal supersymmetric extension of the standard model. Cross section limits are also presented using simplified models with new particles decaying to an undetected particle and one or two jets

Constraints on the χ_(c1) versus χ_(c2) polarizations in proton-proton collisions at √s = 8 TeV

The polarizations of promptly produced χ_(c1) and χ_(c2) mesons are studied using data collected by the CMS experiment at the LHC, in proton-proton collisions at √s=8  TeV. The χ_c states are reconstructed via their radiative decays χ_c → J/ψγ, with the photons being measured through conversions to e⁺e⁻, which allows the two states to be well resolved. The polarizations are measured in the helicity frame, through the analysis of the χ_(c2) to χ_(c1) yield ratio as a function of the polar or azimuthal angle of the positive muon emitted in the J/ψ → μ⁺μ⁻ decay, in three bins of J/ψ transverse momentum. While no differences are seen between the two states in terms of azimuthal decay angle distributions, they are observed to have significantly different polar anisotropies. The measurement favors a scenario where at least one of the two states is strongly polarized along the helicity quantization axis, in agreement with nonrelativistic quantum chromodynamics predictions. This is the first measurement of significantly polarized quarkonia produced at high transverse momentum