44 research outputs found
Measurement of B meson production cross-sections in proton-proton collisions at âs= 7 TeV
The production cross-sections of B mesons are measured in pp collisions at a centre-of-mass energy of 7 TeV using data collected with the LHCb detector corresponding to a integrated luminosity of 0.36fbâ1. The B+, B0 and B0s mesons are reconstructed in the exclusive decays B+âJ/ÏK+, B0âJ/ÏKâ0 and B0sâJ/ÏÏ, with J/ÏâÎŒ+ÎŒâ, Kâ0âK+Ïâ and ÏâK+Kâ. The differential cross-sections are measured as functions of B meson transverse momentum pT and rapidity y, in the range 0 < pT<40GeV/c2 and 2.0<y<4.5. The integrated cross-sections in the same pT and y ranges, including charge-conjugate states, are measured to be
Ï(ppâB++X)=38.9±0.3(stat.)±2.5(syst.)±1.3(norm.)ÎŒb,
Ï(ppâB0+X)=38.1±0.6(stat.)±3.7(syst.)±4.7(norm.)ÎŒb,
Ï(ppâB0s+X)=10.5±0.2(stat.)±0.8(syst.)±1.0(norm.)ÎŒb,
where the third uncertainty arises from the pre-existing branching fraction measurements
PrĂĄcticas del enfermero en el contexto de la atenciĂłn bĂĄsica: scoping review
Objective: to identify and categorize the practices performed by nurses working in Primary Health Care and Family Health Strategy Units in light of responsibilities established by the professionâs legal and programmatic frameworks and by the Brazilian Unified Health System. Method: a scoping review was conducted in the following databases: LILACS, IBECS, BDENF, CINAHL and MEDLINE, and the Cochrane and SciELO libraries. Original research papers written by nurses addressing nursing practices in the primary health care context were included. Results: the review comprised 30 studies published between 2005 and 2014. Three categories emerged from the analysis: practices in the service; practices in the community; and management and education practices. Conclusion: the challenges faced by nurses are complex, as care should be centered on the populationâs health needs, which requires actions at other levels of clinical and health responsibility. Brazilian nursing has achieved important advancements since the implementation of policies intended to reorganize work. There is, however, a need to shift work processes from being focused on individual procedures to being focused on patients so that an enlarged clinic is the ethical-political imperative guiding the organization of services and professional intervention.Objetivo: identificar e categorizar as prĂĄticas exercidas pelos enfermeiros junto Ă s Unidades BĂĄsicas e Ă s Equipes de SaĂșde da FamĂlia, Ă luz das atribuiçÔes previstas pelos marcos legais e programĂĄticos da profissĂŁo e do Sistema Ănico de SaĂșde. MĂ©todo: realizou-se uma revisĂŁo da literatura com o mĂ©todo scoping review, nas bases LILACS, IBECS, BDENF, CINAHL e MEDLINE, e nas bibliotecas Cochrane e SciELO. IncluĂram-se artigos de pesquisa original, produzidos com enfermeiros, sobre as prĂĄticas de enfermagem no contexto dos cuidados de saĂșde primĂĄrios. Resultados: a revisĂŁo abrangeu trinta estudos publicados entre 2005 e 2014. Da anĂĄlise, resultaram trĂȘs categorias: prĂĄticas no serviço, prĂĄticas na comunidade e prĂĄticas de gestĂŁo e formação. ConclusĂŁo: os desafios dos enfermeiros sĂŁo complexos, posto que o cuidado deve estar centrado nas necessidades de saĂșde da população, o que remete Ă ação para outros nĂveis de responsabilidade clĂnica e sanitĂĄria. A enfermagem brasileira mostra importantes avanços desde a implantação das polĂticas de reorganização do trabalho. Necessita, entretanto, avançar no que se refere ao deslocamento dos processos de trabalho, focados em procedimentos individuais, para um processo mais voltado aos usuĂĄrios, onde a clĂnica ampliada seja o imperativo Ă©tico-polĂtico da organização dos serviços e da intervenção profissional.Objetivo: identificar y categorizar las prĂĄcticas ejercidas por los enfermeros en las Unidades BĂĄsicas y los Equipos de Salud de la Familia, desde el punto de vista de las atribuciones previstas por los marcos legales y programĂĄticos de la profesiĂłn y del Sistema Ănico de la Salud. MĂ©todo: se realizĂł una revisiĂłn de la literatura con el mĂ©todo scoping review, en las bases LILACS, IBECS, BDENF, CINAHL y MEDLINE, y en las bibliotecas Cochrane y SciELO. Se incluyeron artĂculos de investigaciĂłn original, producidos con enfermeros, sobre las prĂĄcticas de enfermerĂa en el contexto de los cuidados de salud primarios. Resultados: la revisiĂłn abarcĂł treinta estudios publicados entre 2005 y 2014. Del anĂĄlisis, resultaron tres categorĂas: prĂĄcticas en el servicio; prĂĄcticas en la comunidad; y, prĂĄcticas de administraciĂłn y formaciĂłn. ConclusiĂłn: los desafĂos de los enfermeros son complejos, ya que el cuidado debe estar centrado en las necesidades de salud de la poblaciĂłn, lo que conduce a la acciĂłn para otros niveles de responsabilidad clĂnica y sanitaria. La enfermerĂa brasileña muestra importantes avances a partir de la implantaciĂłn de las polĂticas de reorganizaciĂłn del trabajo. Necesita, entre tanto, avanzar en lo que se refiere al desplazamiento de los procesos de trabajo, enfocados en procedimientos individuales, para un proceso mĂĄs dirigido a los usuarios, en donde la clĂnica ampliada sea el imperativo Ă©tico polĂtico de la organizaciĂłn de los servicios y de la intervenciĂłn profesional.info:eu-repo/semantics/publishedVersio
Study of production and cold nuclear matter effects in pPb collisions at=5 TeV
Production of mesons in proton-lead collisions at a nucleon-nucleon centre-of-mass energy = 5 TeV is studied with the LHCb detector. The analysis is based on a data sample corresponding to an integrated luminosity of 1.6 nb(-1). The mesons of transverse momenta up to 15 GeV/c are reconstructed in the dimuon decay mode. The rapidity coverage in the centre-of-mass system is 1.5 < y < 4.0 (forward region) and -5.0 < y < -2.5 (backward region). The forward-backward production ratio and the nuclear modification factor for (1S) mesons are determined. The data are compatible with the predictions for a suppression of (1S) production with respect to proton-proton collisions in the forward region, and an enhancement in the backward region. The suppression is found to be smaller than in the case of prompt J/psi mesons
Measurement of J/Ï production in pp collisions at sâ=2.76TeV
The production of J/Ï mesons is studied with the LHCb detector using data from pp collisions at sâ=2.76 TeV corresponding to an integrated luminosity of 71 nbâ1. The differential cross-section for inclusive J/Ï production is measured as a function of its transverse momentum p T. The cross-section in the fiducial region 0â<âp Tâ <â12 GeV/c and rapidity 2.0â< y <4.5 is measured to be 5.6â±â0.1 (stat)â±â0.4 (syst) ÎŒb, with the assumption of unpolarised J/Ï production. The fraction of J/Ï production from b-hadron decays is measured to be (7.1â±â0.6 (stat)â±â0.7 (syst))%
Measurement of asymmetries and polarisation fractions in decays
An angular analysis of the decay is
performed using collisions corresponding to an integrated luminosity of
collected by the LHCb experiment at a centre-of-mass energy
TeV. A combined angular and mass analysis separates six helicity
amplitudes and allows the measurement of the longitudinal polarisation fraction
for the decay. A large scalar contribution from the
and resonances is found, allowing the
determination of additional asymmetries. Triple product and direct
asymmetries are determined to be compatible with the Standard Model
expectations. The branching fraction is measured to be