Reducing the environmental impact of surgery on a global scale: systematic review and co-prioritization with healthcare workers in 132 countries

Abstract Background Healthcare cannot achieve net-zero carbon without addressing operating theatres. The aim of this study was to prioritize feasible interventions to reduce the environmental impact of operating theatres. Methods This study adopted a four-phase Delphi consensus co-prioritization methodology. In phase 1, a systematic review of published interventions and global consultation of perioperative healthcare professionals were used to longlist interventions. In phase 2, iterative thematic analysis consolidated comparable interventions into a shortlist. In phase 3, the shortlist was co-prioritized based on patient and clinician views on acceptability, feasibility, and safety. In phase 4, ranked lists of interventions were presented by their relevance to high-income countries and low–middle-income countries. Results In phase 1, 43 interventions were identified, which had low uptake in practice according to 3042 professionals globally. In phase 2, a shortlist of 15 intervention domains was generated. In phase 3, interventions were deemed acceptable for more than 90 per cent of patients except for reducing general anaesthesia (84 per cent) and re-sterilization of ‘single-use’ consumables (86 per cent). In phase 4, the top three shortlisted interventions for high-income countries were: introducing recycling; reducing use of anaesthetic gases; and appropriate clinical waste processing. In phase 4, the top three shortlisted interventions for low–middle-income countries were: introducing reusable surgical devices; reducing use of consumables; and reducing the use of general anaesthesia. Conclusion This is a step toward environmentally sustainable operating environments with actionable interventions applicable to both high– and low–middle–income countries

Search for Scalar Leptoquark Pair Production Decaying into Top-Quarks and Leptons at s\sqrt{s} = 13 TeV with ATLAS detector

This poster presents a search for pair-produced scalar leptoquarks decaying to leptons and hadronic top quarks using 139 $\text{fb}^{-1}$ of data recorded by the ATLAS detector at $\sqrt{s}$ = 13 TeV. As well as being predicted by various extensions of the Standard Model to describe the similarity between the quark and lepton sectors, leptoquarks provide a promising explanation for anomalies observed in both the lepton universality tests in B decays and muon anomalous magnetic moment measurement. Searches for pair-produced scalar leptoquarks decaying to electron-top or muon-top pairs have been performed in final states with exactly two leptons. A parameterized gradient boosted decision trees approach is used to suppress the standard model background. Improved exclusion limits are set on the leptoquark masses are set at 95% confidence level

Vers le public : un nouveau paradigme

Results from latest searches for pair-produced scalar leptoquarks using 36.1 $\text{fb}^{-1}$ of $pp$-collision data recorded by the ATLAS detector at $\sqrt{s}$ = 13 TeV are presented. No statistically significant excess of data over Standard Model prediction is observed. The observed limits on first (second) generation leptoquark masses are excluded up to 1400 (1560) GeV with $\beta$=1. Third generation leptoquark masses are excluded up to 1000 GeV with symmetric final states for both up-type and down-type leptoquarks

Searches for new phenomena in final states involving leptons and jets using the ATLAS detector

Many beyond the Standard Model signatures predict new particles that decay into final state containing both leptons and jets. This talk will present new search results for massive particles by the ATLAS experiment using the full Run 2 dataset. A particular focus is given to searches for leptoquarks (LQ), that offer an attractive potential explanation for the lepton flavour anomalies seen at flavour factories, and heavy neutrinos, such as the Type I or Type III seesaw mechanisms which can explain the light neutrino masses

Searching for leptoquarks with the ATLAS detector

Leptoquarks (LQ) are predicted by many new physics theories to describe the similarities between the lepton and quark sectors of the Standard Model and offer an attractive potential explanation for the lepton flavour anomalies observed at flavour factories. The ATLAS experiment has a broad program of direct searches for leptoquarks, coupling to the first-, second- or third-generation particles. This talk will present the most recent 13 TeV results on the searches for pair-produced leptoquarks with the ATLAS detector, covering all three generations, and highlight their complementarity

Searching for leptoquarks with the ATLAS detector

Results from the latest searches for pair-produced scalar leptoquarks using 36.1 $\text{fb}^{-1}$ of $pp$-collision data recorded by the ATLAS detector at $\sqrt{s}$ = 13 TeV were presented. No statistically significant excess of data over Standard Model prediction is observed. The observed limits on first- (second-) generation leptoquark masses are excluded up to 1400 (1560) GeV in the minimal Buchmüller-Rückl-Wyler model, assuming a leptoquark decay branching ratio of 100% into a charged lepton and a quark. Third generation leptoquark masses are excluded up to 1000 GeV at the highest and lowest decay branching ratios for both up-type and down-type leptoquarks

Vers le public : un nouveau paradigme

Results from latest searches for pair-produced scalar leptoquarks using 36.1 $\text{fb}^{-1}$ of $pp$-collision data recorded by the ATLAS detector at $\sqrt{s}$ = 13 TeV are presented. No statistically significant excess of data over Standard Model prediction is observed. The observed limits on first (second) generation leptoquark masses are excluded up to 1400 (1560) GeV with $\beta$=1. Third generation leptoquark masses are excluded up to 1000 GeV with symmetric final states for both up-type and down-type leptoquarks

New physics hunt at the Large Hadron Collider with the ATLAS detector : search for heavy exotic resonances and upgrade of the Transition Radiation Tracker DAQ system

Many theories beyond the Standard Model suggest new particles at the TeV energy scale, that could be produced in proton-proton collisions delivered by the CERN Large Hadron Collider and collected by the ATLAS experiment. Since 2016, the accelerator has surpassed its expected value of luminosity by up to a factor of two. The data acquisition system of the ATLAS Transition Radiation Tracker had to be upgraded to meet the demand from the challenging beam conditions and the higher trigger rate in Run II beyond the original design of the tracking detector. The improvements developed in the hardware and firmware of the DAQ system are documented in this dissertation, with a study to evaluate the performance of the system. This dissertation also presents two searches for new massive bosons at the TeV scale. The first analysis searches for heavy resonances decaying into a hadronic Z/W/Higgs boson and a photon. The boosted Z/W/Higgs boson is identified using large-radius jet mass and substructure informations. The analysis is based on 36 inverse femtobarns of √s = 13 TeV proton–proton collision data, collected with the ATLAS detector in Run II of the Large Hadron Collider. No significant deviations from the Standard Model prediction is observed. Upper limits are set on the signal cross section multiplied by the branching fraction of resonance for the three different diboson final states at 95% confidence level, excluding those productions at 10–0.2 femtobarns in the resonance mass range of 1–6.8 TeV. The second analysis searches for scalar leptoquark pair productions, where each leptoquark decays into a top quark and an electron or a muon. The search sensitivity is optimized for high leptoquark masses, at which the hadronic decay products of each top quark are contained within a large-radius jet. The analysis exploits the full Run II dataset that corresponds to an integrated luminosity of 139 inverse femtobarns. No significant excess of events is found. Lower mass limits on leptoquarks decaying into electron–top-quark or muon–top-quark pair are set to 1.48 TeV and 1.47 TeV at 95% confidence level.Science, Faculty ofPhysics and Astronomy, Department ofGraduat

Search for scalar leptoquark pair production decaying into top-quarks and leptons at s\sqrt{\textrm{s}} = 13 TeV with ATLAS detector

This contribution presents a search for pair-produced scalar leptoquarks decaying to leptons and hadronically decaying top quarks at the LHC using 139 fb$^{-1}$ of proton--proton collision data recorded by the ATLAS detector at $\sqrt{s}$ = 13 TeV. As well as being predicted by various extensions of the Standard Model to describe the similarity between the quark and lepton sectors, leptoquarks provide a promising explanation for anomalies observed in both the lepton universality tests in $B$ decays and muon anomalous magnetic moment measurement. Searches for pair-produced scalar leptoquarks decaying into electron-top or muon-top pairs have been performed in final states with exactly two leptons. A parameterized gradient boosted decision trees approach is used to suppress the Standard Model backgrounds. No excess over the Standard Model prediction was observed. Exclusion limits on the leptoquark masses are set at 1480 GeV and 1470 GeV for the electron and muon channel, respectively