Measurement of ϒ production in pp collisions at √s = 2.76 TeV

The production of ϒ(1S), ϒ(2S) and ϒ(3S) mesons decaying into the dimuon final state is studied with the LHCb detector using a data sample corresponding to an integrated luminosity of 3.3 pb−1 collected in proton–proton collisions at a centre-of-mass energy of √s = 2.76 TeV. The differential production cross-sections times dimuon branching fractions are measured as functions of the ϒ transverse momentum and rapidity, over the ranges pT < 15 GeV/c and 2.0 < y < 4.5. The total cross-sections in this kinematic region, assuming unpolarised production, are measured to be σ (pp → ϒ(1S)X) × B ϒ(1S)→μ+μ− = 1.111 ± 0.043 ± 0.044 nb, σ (pp → ϒ(2S)X) × B ϒ(2S)→μ+μ− = 0.264 ± 0.023 ± 0.011 nb, σ (pp → ϒ(3S)X) × B ϒ(3S)→μ+μ− = 0.159 ± 0.020 ± 0.007 nb, where the first uncertainty is statistical and the second systematic

Study of the doubly charmed tetraquark T+cc

Quantum chromodynamics, the theory of the strong force, describes interactions of coloured quarks and gluons and the formation of hadronic matter. Conventional hadronic matter consists of baryons and mesons made of three quarks and quark-antiquark pairs, respectively. Particles with an alternative quark content are known as exotic states. Here a study is reported of an exotic narrow state in the D0D0π+ mass spectrum just below the D*+D0 mass threshold produced in proton-proton collisions collected with the LHCb detector at the Large Hadron Collider. The state is consistent with the ground isoscalar T+cc tetraquark with a quark content of ccu⎯⎯⎯d⎯⎯⎯ and spin-parity quantum numbers JP = 1+. Study of the DD mass spectra disfavours interpretation of the resonance as the isovector state. The decay structure via intermediate off-shell D*+ mesons is consistent with the observed D0π+ mass distribution. To analyse the mass of the resonance and its coupling to the D*D system, a dedicated model is developed under the assumption of an isoscalar axial-vector T+cc state decaying to the D*D channel. Using this model, resonance parameters including the pole position, scattering length, effective range and compositeness are determined to reveal important information about the nature of the T+cc state. In addition, an unexpected dependence of the production rate on track multiplicity is observed

Embodied energy and embodied carbon of 81 shelters globally

This excel file contains information and calculations used to estimate the embodied energy and the embodied carbon of emergency, transitional and durable shelters used to house displaced persons. The study considers a sample of 81 shelters drawn from 34 countries in South and Central America, Africa, Europe, the Middle East and Asia

Dataset for Life Cycle Assessment in the Building Design Process

The dataset includes the bibliographic information for all literature retrieved from the associated systematic literature search. The following information are included - which searches were used to acquire the literature, the ability to download the literature and the classification of the literature following the abstract review. The dataset summarizes the literature searches that were completed on December 16, 2019

Dataset for "Current and Future Test Reference Years at a 5km Resolution"

The weather data (.EPW format) was created for use in building simulations. The weather data is available at a 5km by 5km spatial resolution across the UK. Thus, building practitioners are able to assess thermal performance of buildings with localised weather for more convincing results. In addition, it is possible to investigate spatial variability of thermal performance of buildings for the whole UK

Wind Tool

This tool is designed to help you estimate the pull resistance required of the footing of a shelter to help the shelter survive a storm. Inside the tool (README tab) you will find some tips on how to make shelters more able to resist high winds, and we recommend you read it before using this tool. Armed with this information, you will be able to complete a pull resistance test as outlined in the supporting documents and see if your footings are able to resist the load