Colecciones Institucionales

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Browsing Colecciones Institucionales by browse.metadata.fuente "BioMed Central"

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    Measurements of the production cross-sections of a Higgs boson in association with a vector boson and decaying into WW* with the ATLAS detector at s = 13 TeV
    (2025) Aad, G.; Aakvaag, E.; Abbott, B.; Abdelhameed, S.; Abeling, K.; Abicht, N. J.; Abidi, S. H.; Aboelela, M.; Aboulhorma, A.; Abramowicz, H.; Abreu, H.; Abulaiti, Y.; Acharya, B. S.; Ackermann, A.; Adam Bourdarios, C.; Adamczyk, L.; Addepalli, S. V.; Urrejola Pereira, Pedro Salvador; Diaz Gutierrez, Marco Aurelio; Garay Walls, Francisca ; The ATLAS collaboration
    Measurements of the total and differential Higgs boson production cross-sections, via WH and ZH associated production using H → WW* → ℓνℓν and H → WW* → ℓνjj decays, are presented. The analysis uses proton-proton events delivered by the Large Hadron Collider at a centre-of-mass energy of 13 TeV and recorded by the ATLAS detector between 2015 and 2018. The data correspond to an integrated luminosity of 140 fb−1. The sum of the WH and ZH cross-sections times the H → WW* branching fraction is measured to be 0.44 − 0.09 + 0.10 stat . − 0.05 + 0.06 syst . pb, in agreement with the Standard Model prediction. Higgs boson production is further characterised through measurements of the differential cross-section as a function of the transverse momentum of the vector boson and in the framework of Simplified Template Cross-Sections.
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    Precision measurement of the B 0 meson lifetime using  B 0 → J / ψ K ∗ 0 decays with the ATLAS detector
    (2025) Aad, G.; Aakvaag, E. ; Abbott, B.; Abdelhameed, S. ; Abeling, K. ; Abicht, N. J. ; Aboelela, M.; Aboulhorma, A.; Abramowicz, H. ; Abreu, H. ; Abulaiti, Y. ; Acharya, B. S.; Ackermann, A.; Adam Bourdarios, C.; Adamczyk, L.; Addepalli, S. V. ; Abidi, S. H.; Diaz,Marco Aurelio; Garay Walls, Francisca; Urrejola Pereira, Pedro Salvador
    A measurement of the B 0 meson lifetime using B 0 → J / ψ K ∗ 0 decays in data from 13  TeV proton–proton collisions with an integrated luminosity of 140 fb - 1 recorded by the ATLAS detector at the LHC is presented. The measured effective lifetime is τ = 1.5053 ± 0.0012 ( stat . ) ± 0.0035 ( syst . ) ps . The average decay width extracted from the effective lifetime, using parameters from external sources, is Γ d = 0.6639 ± 0.0005 ( stat . ) ± 0.0016 ( syst . ) ± 0.0038 (ext.) ps - 1 , where the uncertainties are statistical, systematic and from external sources. The earlier ATLAS measurement of Γ s in the B s 0 → J / ψ ϕ decay was used to derive a value for the ratio of the average decay widths Γ d and Γ s for B 0 and B s 0 mesons respectively, of Γ d Γ s = 0.9905 ± 0.0022 (stat.) ± 0.0036 (syst.) ± 0.0057 (ext.) . The measured lifetime, average decay width and decay width ratio are in agreement with theoretical predictions and with measurements by other experiments. This measurement provides the most precise result of the effective lifetime of the B 0 meson to date.
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    Sex differences in work-related accidents extracted from free text in Spanish using natural language processing
    (2025) Dunstan Escudero, Jocelyn Mariel; Campaña Herrera, Valentina Andrea; Miranda, Luis; Ladron De Guevara Jara, Rocio Helena; Pincheira, Pablo; Rocco, Victor; Moyano Dávila, Daniela Paz
    Evidence from the global north shows that women and men significantly differ in work accidents and occupational disease rates. However, more data is needed for countries elsewhere. Methods Using natural language processing (NLP), we extracted accident mechanisms from 350,000 admission reports from the largest occupational health provider in Chile. In addition, using the same technique, we normalize occupations written in free text, following the nomenclature from the International Labour Organization (ILO). Results We found that in 57.3% of accidents, a man is affected, while in 42.7% is a woman. The most common occupation for men is operator, while for women, it is related to cleaning duties. The most common form of accident for women is falling from the same height while for men is contact with sharp objects. In this work, we demonstrate the power of NLP in the massive analysis of work-related accidents by reporting the use of large language models with human expert annotation to evaluate mechanisms extraction. Conclusion By sharing our prompts and code, we aim to help other institutions and countries extract crucial information from free text to a controlled vocabulary of ILO. Future work includes the analysis of commuting accidents and occupational diseases.