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Oscillations in the B-s(0)- <(B-s(0))over bar> system were studied in events selected from about 4.3 million hadronic Z(0) decays registered by DELPHI between 1992 and 2000. This paper presents updates of two published analyses ([11, 12]). The first analysis, which utilizes leptons emitted with large momentum transverse to a jet, was improved by means of a better algorithm for the vertex reconstuc
A search for scalar and vector leptoquarks coupling to first generation fermions is performed using the e(+) p and e(-) p scattering data collected by the H1 experiment between 1994 and 2000. The data correspond to a total integrated luminosity of 117 pb(-1). No evidence for the direct or indirect production of such particles is found in data samples with a large transverse momentum final state el
Popular Abstract in Swedish Mikroorganismer finns runt omkring oss i miljön och mycket tyder på att de påverkar oss mer, och delvis på ett annat sätt, än vi tidigare trott. Vi vet alla att infektioner kan spridas genom inandning av luftburna patogena mikroorganismer. Men luftburna mikrober kan även ge andra sjukdomar. Det är t.ex välkänt att lantbrukare riskerar att drabbas av symptom i luftvägarnMicroorganisms are ubiquitous in indoor air and epidemiological data suggest that inhalation of microbes and/or their products adhered on air–borne dust particles can impair well–being and health. In the present thesis microbial volatile organic compounds (MVOCs) and cellular markers were studied by gas chromatography–mass spectrometry (GC/MS). By using solid phase microextraction (SPME) combined
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A search for excited electrons is performed using the full e(+/-) p data sample collected by the HI experiment at HERA, corresponding to a total luminosity of 475 pb(-1). The electroweak decays of excited electrons e* -> e gamma, e* -> eZ and e* -> vW with subsequent hadronic or leptonic decays of the W and Z bosons are considered. No evidence for excited electron production is found. Mass depende
Accurate estimations of background processes associated with top-quarks are vital to studies concerned with finding new physics at the Large Hadron Collider (LHC)at CERN. Search for Higgs-like bosons in the ATLAS experiment at LHC was performed by optimising the use of b-jet tagging algorithms and improving on tt backgroundmodelling. Improved modelling was achieved using two different methods, tt
Recent work by Nissen and Schuster have found two distinct populations of halo stars with -1<5 alpha [Fe/H] -0<5. Both populations are kinematically selected to be halo stars. The differences between the two groups are the alpha -elemental abundances and the [Na/Fe] and [Ni/Fe] ratios. From angular momentum space, we can see that the majority of these stars do not show any extreme kinematic indica
During the past decades there is a growing interest to include a cultural dimension in the debate on sustainable development. In this thesis I explore how culture, and more specifically the Flemish cultural sector, contributes to the transition to a sustainable society. By means of case studies, I examine how cultural organizations perceive their role in the transition process and how they transla
This thesis presents the work I did for the inclusive search for anomalous production of same charge lepton-pairs, originating from the collision point, at sqrt(s) = 8 TeV with the ATLAS detector at the LHC using the 2012 data. I optimized the selection criteria for isolated electrons and muons, calculated the so-called "fake factors" and "fake factor" systematic uncertainties
This thesis covers four different topics related to the physics analysis in the ATLAS experiment that uses protonproton collisions data provided by the Large Hadron Collider. The first topic is focused on the numerical simulation of the Transition Radiation Tracker which is one of the ATLAS tracking detectors. The implementation of the alternative Argon based gas mixtures used in the drift tubes i
We study the conditions required to make the two-Higgs-doublet-model (2HDM) scalar potential stable up to the Planck scale. The lightest CP-even scalar is assumed to have been found at the LHC and the alignment limit is imposed in view of the LHC Higgs data. We find that ensuring stability up to scales 1010GeV necessitates the introduction of a soft breaking parameter in the theory. Even then, som
The etiology of multiple myeloma (MM) is poorly understood. Summary data from genome-wide association studies (GWASs) of multiple phenotypes can be exploited in a Mendelian randomization (MR) phenome-wide association study (PheWAS) to search for factors influencing MM risk. We performed an MR-PheWAS analyzing 249 phenotypes, proxied by 10 225 genetic variants, and summary genetic data from a GWAS
The purpose of this paper is to introduce the concept coworkers’ communicative responsibility taking and to test which factors might influence coworkers’ tendency to take communicative responsibility. The study is split into two phases where on exploratory phase consisted of an exploratory factor analysis on 2244 with the aim to find specific latent factors to test in the confirmatory phase. The c
The interatomic Auger effect following O 1s ionization in N2O has been experimentally investigated using multi-electron coincidence spectroscopy. The expected transition energies have been established by comparison to the measured N 1s−1v−1 core-valence double ionization energies. We describe a procedure to eliminate the background of two competing processes contributing spectroscopic signatures t
In amyloid light chain (AL) amyloidosis, amyloid fibrils derived from immunoglobulin light chain are deposited in many organs, interfering with their function. The etiology of AL amyloidosis is poorly understood. Summary data from genome-wide association studies (GWASs) of multiple phenotypes can be exploited by Mendelian randomization (MR) methodology to search for factors influencingALamyloidosi
A measurement of time-dependent CP violation in D0→π+π-π0 decays using a pp collision data sample collected by the LHCb experiment in 2012 and from 2015 to 2018, corresponding to an integrated luminosity of 7.7 fb-1, is presented. The initial flavor of each D0 candidate is determined from the charge of the pion produced in the D∗(2010)+→D0π+ decay. The decay D0→K-π+π0 is used as a control channel
ESSνSB is a design study for a next-generation long-baseline neutrino experiment that aims at the precise measurement of the CP-violating phase, δCP, in the leptonic sector at the second oscillation maximum. The conceptual design report published from the first phase of the project showed that after 10 years of data taking, more than 70% of the possible δCP range will be covered with 5σ C.L. to re
This thesis explores the functionality of Extend Producer Responsibility (EPR) in the management of Electrical and Electronic waste (e-waste) in Kenya using a case study on manufacturer involvement in end-of-life management. To achieve the purpose of the study the analytical framework used incorporates Environmental effectiveness, Economic efficiency, Political acceptability, Administrabilty and I
