Inclusive and multiplicity dependent production of electrons from heavy-flavour hadron decays in pp and p-Pb collisions

Measurements of the production of electrons from heavy-flavour hadron decays in pp collisions at root s = 13 TeV at midrapidity with the ALICE detector are presented down to a transverse momentum (p(T)) of 0.2 GeV/c and up to p(T) = 35 GeV/c, which is the largest momentum range probed for inclusive electron measurements in ALICE. In p-Pb collisions, the production cross section and the nuclear modification factor of electrons from heavy-flavour hadron decays are measured in the p(T) range 0.5 < p(T) < 26 GeV/c at root s(NN) = 8.16 TeV. The nuclear modification factor is found to be consistent with unity within the statistical and systematic uncertainties. In both collision systems, first measurements of the yields of electrons from heavy-flavour hadron decays in different multiplicity intervals normalised to the multiplicity-integrated yield (self-normalised yield) at midrapidity are reported as a function of the self-normalised charged-particle multiplicity estimated at midrapidity. The self-normalised yields in pp and p-Pb collisions grow faster than linear with the self-normalised multiplicity. A strong p(T) dependence is observed in pp collisions, where the yield of high-p(T) electrons increases faster as a function of multiplicity than the one of low-p(T) electrons. The measurement in p-Pb collisions shows no p(T) dependence within uncertainties. The self-normalised yields in pp and p-Pb collisions are compared with measurements of other heavy-flavour, light-flavour, and strange particles, and with Monte Carlo simulations

Accessing the strong interaction between Λ baryons and charged kaons with the femtoscopy technique at the LHC

The interaction between Λ baryons and kaons/antikaons is a crucial ingredient for the strangeness S=0 and S=-2 sector of the meson–baryon interaction at low energies. In particular, the Lambda-Kbar might help in understanding the origin of states such as the Csi(1620), whose nature and properties are still under debate. Experimental data on Lambda-K and Lambda-Kbar systems are scarce, leading to large uncertainties and tension between the available theoretical predictions constrained by such data. In this Letter we present the measurements of Λ–KK− and Λ–KK+ correlations obtained in the high-multiplicity triggered data sample in pp collisions at sqrt(s) = 13 TeV recorded by ALICE at the LHC. The correlation function for both pairs is modeled using the Lednický–Lyuboshits analytical formula and the corresponding scattering parameters are extracted. The Λ–KK+ correlations show the presence of several structures at relative momenta k* above 200 MeV/c, compatible with the Ω baryon, the , and resonances decaying into Λ–K− pairs. The low k* region in the Λ–KK+ also exhibits the presence of the state, expected to strongly couple to the measured pair. The presented data allow to access the ΛK+ and ΛK− strong interaction with an unprecedented precision and deliver the first experimental observation of the decaying into ΛK−

Sustainable textile initiatives and suggestions for a Nordic Roadmap

This report aims to chart a plan for a coordinated Nordic effort towards sustainable development in textiles and identify ongoing initiatives in the area. The aim was an ambitious plan with a potential for significant reductions in environmental pressures, but also green growth. To reach these goals, we staked out four regions a Nordic plan should include. 1) Replace fast fashion. The key to achieving an environmentally significant effect is to reduce the amount of textiles in circulation. This will reduce the production of waste and the use of chemicals. 2) Reduce resource input. The perspective is all about reducing inputs in textiles value chain. This includes various forms of circulatory thinking, material efficiency, as well as commercial forms of recycling and waste management. 3) Redirect global vs local. Locally produced textiles, with emphasis on ingredients, traditions, uniqueness and innovation, is a new and positive measure that can easily get attention outside environmentally conscious circles. A greater appreciation for good ingredients, and why quality costs, are required to compete with "fast fashion" and shift towards lasting value. Local production has the potential to create green growth and jobs in the region. 4) Rethink for whom Nordic countries are at their best an example of inclusive and democratic societies. The fashion industry however, has marketed itself towards the young and thin. An ethical approach to fashion encompasses not only how clothing is produced, but also who they are produced for and how clothing affects the ability for self-expression and participation in an open society. Ongoing initiatives. The mapping showed that there were many ongoing initiatives in the Nordic. The work has mainly focused on the perspective of so-called "reducing resource use." The more established an initiative is, the more likely it is to be low on innovation. An important dilemma surfaces when attention is on better utilization of waste, as this may indirectly contribute to increased growth in volume

Mapping sustainable textile initiatives : And a potential roadmap for a Nordic actionplan

This report responds to an invitation from the Nordic Council of Ministers to map out Nordic initiatives within textiles as a pre-study to the initiation of a Nordic Roadmap for Sustainable Textiles in 2015. The work has been conducted by: SIFO - National Institute for Consumer Research (Norway) SFA - Sustainable Fashion Academy (Sweden) NFA - Nordic Fashion Association/nicefashion.org (Nordic) IVL - Swedish Environmental Research Institute (Sweden) CRI - Copenhagen Resource Institute (Denmark) Nordic Committee of Senior Officials for Environmental Affairs (EK-M) has been responsible for the funding of this project. The project’s steering committee consists of representatives from members from the working groups; Nordic Chemicals Group (NKG), the Nordic Waste Group (NAG) and the Group of sustainable consumption and production (SCP) and officers from the Environmental Protection Agency in Denmark. This steering Group is jointly responsible for the direction and decisions regarding the project. NAG has been coordinating the work. Coordinator of project has been Yvonne Augustsson from the Swedish Environmental Protection Agency

Probing the chiral magnetic wave with charge-dependent flow measurements in Pb-Pb collisions at the LHC

The Chiral MagneticWave (CMW) phenomenon is essential to provide insights into the strong interaction in QCD, the properties of the quark-gluon plasma, and the topological characteristics of the early universe, offering a deeper understanding of fundamental physics in high-energy collisions. Measurements of the charge-dependent anisotropic flow coefficients are studied in Pb-Pb collisions at center-of-mass energy per nucleon-nucleon collision v sNN = 5.02TeV to probe the CMW. In particular, the slope of the normalized difference in elliptic (v2) and triangular (v3) flow coefficients of positively and negatively charged particles as a function of their event-wise normalized number difference, is reported for inclusive and identified particles. The slope rNorm 3 is found to be larger than zero and to have a magnitude similar to rNorm 2, thus pointing to a large background contribution for these measurements. Furthermore, rNorm 2 can be described by a blast wave model calculation that incorporates local charge conservation. In addition, using the event shape engineering technique yields a fraction of CMW (fCMW) contribution to this measurement which is compatible with zero. This measurement provides the very first upper limit for fCMW, and in the 10-60% centrality interval it is found to be 26% (38%) at 95% (99.7%) confidence level