Search results

We discuss some of the effects of twisted boundary conditions in finite volume using continuum SU(3) Chiral Perturbation Theory. We point out how broken cubic symmetry affects the definitions of quantities such as form-factors. Using the π+ as an example, we give one loop results for the mass, decay constants and electromagnetic form-factor and illustrate how the relevant Ward identities are satis

We show that the geometry of the Wilson lines, entering the operator definition of the transverse-momentum dependent parton distributions and that of the soft factor, follows from the kinematics of the underlying physical process in conjunction with the gauge invariance of the QCD Lagrangian. We demonstrate our method in terms of concrete examples and determine the paths of the associated Wilson l

This review contains an overview of strong interaction effects in weak decays starting with a historical introduction. It contains a short overview of semileptonic decays and their relevance for measuring CKM matrix elements. The main part is devoted to the theoretical calculation on nonleptonic matrix elements relevant for K⁰-K⁰bar mixing and K to pi pi decays. It concludes

After a brief discussion of the statistics available to the four LEP experiments at the time of writing and an overview of B-event characteristics, the authors consider in particular the theory, practice and potential pitfalls of neural networks, a new approach to B tagging which attracted a great deal of interest. They then consider some of the QCD aspects of heavy flavour physics. Finally there

We present a method to combine the all-order treatment of the High Energy Jets exclusive partonic Monte Carlo (HEJ) with the parton shower of Pythia8, while retaining the logarithmic accuracy of both. This procedure enables the generation of fully realistic and hadronised events with HEJ. Furthermore, the combination of the two allorder treatments leads to improvements in the quality of the descri

A framework of operator product expansion (OPE) allows us to study high-energy behaviour of Green functions. A calculation of such Green functions within chiral perturbation theory (PT) or resonance chiral theory (RT) and subsequent matching of the result to the OPE enables us to determine constraints for unknown parameters of the effective theories. We present such procedure for Green functions i

The present status of Chiral Perturbation Theory (ChPT) in the strong mesonic sector is discussed. A very short introduction to ChPT is followed by an overview of existing two-loop calculations and the determination of the Low-Energy-Constants (LECs). I discuss the case of $\eta\to\pi\pi\pi$ decays in somewhat more detail and finish by mentioning some recent work on partially quenched ChPT and on

This talk describes the reasons why $\eta$ and $\eta^\prime$ decays are an interesting topic of study for both theory and experiment. The main part discusses the results of the recent calculation of $\eta\to3\pi$ at two-loop order in ChPT. Some puzzling aspects of the results compared to earlier dispersive calculations are highlighted. I also like to remind the reader of the use of $\eta$ and $\et

Syftet är att undersöka relationen mellan en influencers varumärke som ett human brand och dess följare genom att studera sambanden mellan varumärkesuppfattning, känslor till varumärket samt beteendeintention till influencern. Studien utgår från en kvantitativ forskningsmetod med en deduktiv ansats där hypoteser har formulerats. Insamling av data gjordes genom en webbaserad enkätundersökning där r

Sveriges självbild som länge varit lyckligt befriad från svågerpolitik, maktmissbruk och pengar under bordet har under det senaste decenniet fått sig en törn. Stora svarta rubriker på löpsedlar har uppmärksammat oss på att korruption och mutor även förekommer i vårt trygga demokratiska samhälle. För att på ett effektivt sätt komma åt detta krävs ett fungerande regelverk, något som haltar då det koThe Swedish Bribery Legislation in use today was written in 1977 and is consequently neither completely modern nor crystal clear. There are no legal definitions on what constitutes a bribe or what is giving rise to corruption and the verdicts are instead made on a case by case basis. The Swedish Bribery Legislation has over the years received a lot of criticism as it is seen as unpredictable and d

From a report presented by Public health agency (Folkhälsomyndigheten), it is common amongst female students to experience the study situation as stressful and filled with anxiety. Because of the discussion about female students study situation and the problems it brings is quite old, I experience it to be important for me as a ethnological student and furthermore to contribute with my ethnologica

Barnarbete har funnits sedan urminnes tider över hela världen. Lagstiftning och andra regler har successivt växt fram i syfte att skydda barn från de hot och faror arbetslivet kan medföra. Jag vill undersöka hur regleringen och utvecklingen kring barnarbete har skett under drygt två sekel samt hur rättsläget ser ut i Sverige idag. Denna uppsats kommer besvara två frågeställningar. Frågeställningar

This article is over 5 years old, and the information may therefore be outdated. OUTREACH: Professor Annica Kronsell gave a talk on Collaborative urban sustainability governance through experimentation, hosted by the Melbourne Sustainable Society Institute at the Singapore Theatre, Basement Melbourne School of Design, University of Melbourne on Thursday 23rd March. From the poster:Innovations in u

https://www.svet.lu.se/en/article/kronsell-talked-melbourne-about-more-sustainable-and-climate-resilient-cities - 2026-05-27

Based on high-resolution spectra obtained during gravitational microlensing events we present a detailed elemental abundance analysis of 32 dwarf and subgiant stars in the Galactic bulge. Combined with the sample of 26 stars from the previous papers in this series, we now have 58 microlensed bulge dwarfs and subgiants that have been homogeneously analysed. The main characteristics of the sample an

Rescattering effects in the 3π system in the A1 region are studied with a method, which fulfils unitarity and has the proper analytic structure. Fairly small effects are obtained which confirm the result found in amplitude analyses, neglecting rescattering corrections, that the phases of the JP = 1+ amplitudes vary only very little over the A1 region. Similar results hold for the Q enhancement.

Major Asian cities like Hong Kong, Taipei and Bangkok have been constantly on the verge of rapid transformation, whether politically, socially, and particularly sexually, due to the process of capitalisation, modernisation, and globalisation over the last decade. In response to the impact of the transformation on the historical and traditional space of the city, the region's unique cultural and hi

We have fit synthetic visibilities from 3-D (CO⁵BOLD +PHOENIX) and 1-D (PHOENIX, ATLAS12) model stellar atmospheres forProcyon (F5 IV) to high-precision interferometric data from the VINCIinstrument at the VLT Interferometer (K-band) and from the Mark IIIinterferometer (500 nm, 800 nm). These data provide a test oftheoretical wavelength-dependent limb-darkening predictions, andtherefore