Cultural Heritage and Climate Change: New challenges and perspectives for research

JPI Cultural Heritage & JPI ClimateCollaboration between the two Joint Programming Initiatives “Cultural Heritage and Global Change” (JPI CH), and “Connecting Climate Knowledge for Europe” (JPI Climate) began in 2019 and led to the organisation of a joint workshop a year later. Following the recommendations in the workshop report, an expert working group was set up to scope research gaps and opportunities at the interface of cultural heritage and climate change, culminating in the publication of this White Paper. This strategic document is expected to support the two JPIs to generate policy-relevant research outcomes.Peer reviewe

Multidifferential study of identified charged hadron distributions in ZZ-tagged jets in proton-proton collisions at s=\sqrt{s}=13 TeV

Jet fragmentation functions are measured for the first time in proton-proton collisions for charged pions, kaons, and protons within jets recoiling against a $Z$ boson. The charged-hadron distributions are studied longitudinally and transversely to the jet direction for jets with transverse momentum 20 $< p_{\textrm{T}} < 100$ GeV and in the pseudorapidity range $2.5 < \eta < 4$. The data sample was collected with the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 1.64 fb$^{-1}$. Triple differential distributions as a function of the hadron longitudinal momentum fraction, hadron transverse momentum, and jet transverse momentum are also measured for the first time. This helps constrain transverse-momentum-dependent fragmentation functions. Differences in the shapes and magnitudes of the measured distributions for the different hadron species provide insights into the hadronization process for jets predominantly initiated by light quarks.Comment: All figures and tables, along with machine-readable versions and any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-013.html (LHCb public pages

Study of the B−→Λc+Λˉc−K−B^{-} \to \Lambda_{c}^{+} \bar{\Lambda}_{c}^{-} K^{-} decay

The decay $B^{-} \to \Lambda_{c}^{+} \bar{\Lambda}_{c}^{-} K^{-}$ is studied in proton-proton collisions at a center-of-mass energy of $\sqrt{s}=13$ TeV using data corresponding to an integrated luminosity of 5 $\mathrm{fb}^{-1}$ collected by the LHCb experiment. In the $\Lambda_{c}^+ K^{-}$ system, the $\Xi_{c}(2930)^{0}$ state observed at the BaBar and Belle experiments is resolved into two narrower states, $\Xi_{c}(2923)^{0}$ and $\Xi_{c}(2939)^{0}$, whose masses and widths are measured to be $$m(\Xi_{c}(2923)^{0}) = 2924.5 \pm 0.4 \pm 1.1 \,\mathrm{MeV}, \\ m(\Xi_{c}(2939)^{0}) = 2938.5 \pm 0.9 \pm 2.3 \,\mathrm{MeV}, \\ \Gamma(\Xi_{c}(2923)^{0}) = \phantom{000}4.8 \pm 0.9 \pm 1.5 \,\mathrm{MeV},\\ \Gamma(\Xi_{c}(2939)^{0}) = \phantom{00}11.0 \pm 1.9 \pm 7.5 \,\mathrm{MeV},$$ where the first uncertainties are statistical and the second systematic. The results are consistent with a previous LHCb measurement using a prompt $\Lambda_{c}^{+} K^{-}$ sample. Evidence of a new $\Xi_{c}(2880)^{0}$ state is found with a local significance of $3.8\,\sigma$, whose mass and width are measured to be $2881.8 \pm 3.1 \pm 8.5\,\mathrm{MeV}$ and $12.4 \pm 5.3 \pm 5.8 \,\mathrm{MeV}$, respectively. In addition, evidence of a new decay mode $\Xi_{c}(2790)^{0} \to \Lambda_{c}^{+} K^{-}$ is found with a significance of $3.7\,\sigma$. The relative branching fraction of $B^{-} \to \Lambda_{c}^{+} \bar{\Lambda}_{c}^{-} K^{-}$ with respect to the $B^{-} \to D^{+} D^{-} K^{-}$ decay is measured to be $2.36 \pm 0.11 \pm 0.22 \pm 0.25$, where the first uncertainty is statistical, the second systematic and the third originates from the branching fractions of charm hadron decays.Comment: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-028.html (LHCb public pages

Measurement of the ratios of branching fractions R(D∗)\mathcal{R}(D^{*}) and R(D0)\mathcal{R}(D^{0})

The ratios of branching fractions $\mathcal{R}(D^{*})\equiv\mathcal{B}(\bar{B}\to D^{*}\tau^{-}\bar{\nu}_{\tau})/\mathcal{B}(\bar{B}\to D^{*}\mu^{-}\bar{\nu}_{\mu})$ and $\mathcal{R}(D^{0})\equiv\mathcal{B}(B^{-}\to D^{0}\tau^{-}\bar{\nu}_{\tau})/\mathcal{B}(B^{-}\to D^{0}\mu^{-}\bar{\nu}_{\mu})$ are measured, assuming isospin symmetry, using a sample of proton-proton collision data corresponding to 3.0 fb${ }^{-1}$ of integrated luminosity recorded by the LHCb experiment during 2011 and 2012. The tau lepton is identified in the decay mode $\tau^{-}\to\mu^{-}\nu_{\tau}\bar{\nu}_{\mu}$. The measured values are $\mathcal{R}(D^{*})=0.281\pm0.018\pm0.024$ and $\mathcal{R}(D^{0})=0.441\pm0.060\pm0.066$, where the first uncertainty is statistical and the second is systematic. The correlation between these measurements is $\rho=-0.43$. Results are consistent with the current average of these quantities and are at a combined 1.9 standard deviations from the predictions based on lepton flavor universality in the Standard Model.Comment: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-039.html (LHCb public pages

La pierre et le verre des bâtiments face à la pollution atmosphérique

Lefèvre Roger-Alexandre. La pierre et le verre des bâtiments face à la pollution atmosphérique. In: Les Annales de la recherche urbaine, N°73, 1996. Ville et santé publique. pp. 130-133

Weathering of materials at Notre-Dame from changes in air pollution and climate in Paris, 1325–2090

International audienc

Modelling the Alteration of Medieval Stained Glass as a Function of Climate and Pollution: Comparison between Different Methodologies

International audienceMost stained-glass windows installed during the Middle Ages have deteriorated over time due to climate and pollution. To reconstruct their alteration history over the centuries, evaluate the current environmental risk, and predict their alteration in the future, two modelling methodologies have been used. First, based on the short-term exposure of medieval-type glass in different sites, dose–response functions (DRFs) were established. These DRFs correlate relevant environmental factors (temperature, rain quantity, rain pH, relative humidity, and SO2 concentration) with the response of the material in terms of alteration layer thickness. The second methodology consists of laboratory experiments that aim at parametrising kinetic laws as a function of specific parameters (temperature, rain pH, and relative humidity). These kinetic laws can be extrapolated over long periods, contrary to DRFs. In this study, we compared both methodologies to simulate the alteration of a model stained glass at different European sites or over different time periods. The results highlighted that the kinetic laws were able to closely represent the data, except for the polluted sites where the alteration was underestimated. This indicated that the dependence of the alteration rate on the pollutant concentrations should be included to improve the model

The Future of Our Pasts

On July 3rd, 2019, the Climate Change and Heritage Working Group of ICOMOS delivered a new report on the critical importance of heritage issues to international climate change policy, to the States Parties of the World Heritage Committee. Titled The Future of Our Pasts: Engaging Cultural Heritage in Climate Action, the report was co-published by ICOMOS and the Center for Heritage and Society with funding by the Worldwide Universities Network (WUN).The Climate Change and Heritage Working Group’s (CCHWG) brief is to (more on the Working Group’s brief can be accessed here:(1) Develop and coordinate ICOMOS inputs into the update of the 2007 World Heritage Committee “Policy Document on the Impacts of Climate Change on World Heritage Properties.” This will include soliciting and collecting inputs from various ICOMOS constituencies including National Committee and International Scientific Committees, synthesizing those inputs and offering them in a timely and helpful matter to the joint UNESCO-ICCROM-IUCN-ICOMOS Policy update process.(2) Develop a draft global climate change organizational engagement program for ICOMOS (the “Roadmap”). The ICOMOS Roadmap would suggest a framework for comprehensive engagement by ICOMOS members on climate change including suggested activities and areas of engagement and responsibility for various ICOMOS International Scientific Committees, National Committees, specialized bodies and the Secretariat.(3) Coordinating the drafting of a new ICOMOS Charter on Climate Change and Heritage. A charter is ICOMOS’s most formal type of international doctrinal document, addressing heritage and conservation as a discipline. The consideration and adoption of charters is governed by specific procedures set out in the ICOMOS Rules of Procedure. The pursuit of Charter as a capstone to the Working Group efforts is advisable both because the outcome will provide authoritative guidance on best practices for the managing of heritage in the face of climate change but also because the inclusive process is required for charter consideration is perhaps the most comprehensive way to engage ICOMOS members on a topic. The charter is expected to be a map to the Policy Document but will include all types of cultural heritage (not just World Heritage) and may extend to areas that the WHC chooses not to include in its Policy for political or other reasons. Target completion draft: October 2019 (final draft submission at ICOMOS annual general meeting; Rabat, Morocco); October 2020: adoption at the 20th ICOMOS General Assembly (Sydney, Australia)

Évaluation des interventions de santé mondiale

Une couverture universelle des soins de santé en 2030 pour tous les êtres humains, du Nord au Sud ? Réaliser cet objectif de développement durable aussi ambitieux que nécessaire exigera une exceptionnelle volonté politique, mais aussi de solides données probantes sur les moyens d’y arriver, notamment sur les interventions de santé mondiale les plus efficaces. Savoir les évaluer est donc un enjeu majeur. On ne peut plus se contenter de mesurer leur efficacité : il nous faut comprendre pourquoi elles l’ont été (ou pas), comment et dans quelles conditions. Cet ouvrage collectif réunissant 27 auteurs et 12 autrices de différents pays et de disciplines variées a pour but de présenter de manière claire et accessible, en français, un florilège d’approches et de méthodes avancées en évaluation d’interventions : quantitatives, qualitatives, mixtes, permettant d’étudier l’évaluabilité, la pérennité, les processus, la fidélité, l’efficience, l’équité et l’efficacité d’interventions complexes. Chaque méthode est présentée dans un chapitre à travers un cas réel pour faciliter la transmission de ces savoirs précieux