Photoproduction with a mini-jet model and Cosmic Ray showers

We present post-LHC updates of estimates of the total photo-production cross section in a mini-jet model with infrared soft gluon resummation, and apply the model to study Cosmic Ray shower development, comparing the results with those obtained from other existing models.Comment: 7 pages, 5 figures, presented at Photon 2017, 22-26 May 2017 CER

Photoproduction models for total cross section and shower development

A model for the total photoproduction cross section based on the ansatz that resummation of infrared gluons limits the rise induced by QCD minijets in all the total cross-sections, is used to simulate extended air showers initiated by cosmic rays with the AIRES simulation program. The impact on common shower observables, especially those related with muon production, is analysed and compared with the corresponding results obtained with previous photoproduction models.Comment: 5 pages, 5 figures, to appear in Proceedings of ISVHCRI 201

QCD predictions for total cross-sections and the Froissart Bound

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Photoproduction models for total cross section and shower development

A model for the total photoproduction cross section, based on the ansatz that resummation of infrared gluons limits the rise induced by QCD minijets in all the total cross-sections, is used to simulate extended air showers initiated by cosmic rays with the AIRES simulation program. The impact on common shower observables, especially those related with muon production, is analysed and compared with the corresponding results obtained with previous photoproduction models.Instituto de Física La Plat

Total and inelastic cross-sections at LHC at CM energy of 7 TeV and beyond

We discuss expectations for the total and inelastic cross-sections at LHC CM energies $\sqrt{s}\ =\ 7\ TeV$ {and $14\ TeV$} obtained in an eikonal minijet model augmented by soft gluon $k_t$-resummation, which we describe in some detail. We present a band of predictions which encompass recent LHC data and suggest that the inelastic cross-section described by two channel eikonal models include only uncorrelated processes. We show that this interpretation of the model is supported by the LHC data.Comment: 32 pages, 6 figures, Version to appear in Physical Review

Soft Gluon kt-Resummation and the Froissart bound

We study soft gluon kt-resummation and the relevance of zero momentum gluons for the energy dependence of total hadronic cross-sections. We discuss a model in which consistency of the energy dependence of the cross-section with the limitation of the Froissart bound, is directly related to the behaviour of the strong coupling constant in the infrared region. Our predictions for the asymptotic behaviour are shown to be related to the ansatz that the infrared behaviour of the QCD strong coupling constant follows an inverse power law.Comment: To be published in Physics Letters B. This version is 25% shorter than the previous one, as requested by the restrictions on the number of pages for this Journal. Some equations have been skipped, some text has been summarized. The earliest version may be useful for a better understanding of some of the materia

Whole Life Carbon Impact of:45 Timber Buildings

Sustainable buildings are increasingly a key concern, especially when it comes to reducing their climate footprints. This has resulted in the 2023 Building Regulations introducing requirements for the environmental impact of buildings. Buildings of more than 1000 square meters must now comply with requirements of 12 kg CO2 eq per square meter per year.To reduce the impact from buildings, focus is increasingly on bio-based materials, including wood, since wood will capture CO2 during growth and store it until end-of-life breakdown. Consequently, bio-based materials are frequently used, largely because of the potential to reduce existing environmental impact from buildings now and in the future.This report highlights the environmental potential of using bio-based materials in the construction industry. The report investigates the environmental impact of 45 timber buildings along with the practical challenges encountered when using timber in construction. First, the report presents the findings of all 45 case studies and, second, a case collection comprising 35 of these to provide inspiration for using wood in construction

Housing construction from 4 to 1 planet:24 best practice cases

This report is part of the initiative Housing Construction from 4 to 1 Planet’s body of knowledge, which sets out to gather, analyse, and present knowledge about best-practice housing construction to ensure that the initiative rests on a strong foundation of knowledge and makes use of the best possible tools, as well as inspiring and showing the way forward for future housing construction with a lower carbon footprint.Data and experience from building case studies are obtained in collaboration with architects, engineers, architectural technologists and construction managers, and building owners