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Charged particle reconstruction in the presence of many simultaneous proton–proton (pp) collisions in the LHC is a challenging task for the ATLAS experiment’s reconstruction software due to the combinatorial complexity. This paper describes the major changes made to adapt the software to reconstruct high-activity collisions with an average of 50 or more simultaneous pp interactions per bunch cross
A measurement of the invisible width of the Z boson using events with jets and missing transverse momentum is presented using 37 fb−1 of 13 TeV proton–proton data collected by the ATLAS detector in 2015 and 2016. The ratio of Z→inv to Z→ℓℓ events, where inv refers to non-detected particles and ℓ is either an electron or a muon, is measured and corrected for detector effects. Events with at least o
A search for CP violation in D0→KS0K+π− and D0→KS0K−π+ decays is reported. The search is performed using an unbinned model-independent method known as the energy test that probes local CP violation in the phase space of the decays. The data analysed correspond to an integrated luminosity of 5.4 fb−1 collected in proton-proton collisions by the LHCb experiment at a centre-of-mass energy of s = 13 T
An amplitude analysis of the B0→K∗0μ+μ- decay is presented using a dataset corresponding to an integrated luminosity of 4.7 fb-1 of pp collision data collected with the LHCb experiment. For the first time, the coefficients associated to short-distance physics effects, sensitive to processes beyond the standard model, are extracted directly from the data through a q2-unbinned amplitude analysis, wh
Med utgångspunkt i nationella trygghetsundersökningen, NTU, som visat att unga män rapporterar en ökande rädsla och oro för att utsättas för brott, syftar denna uppsats till att undersöka vilka eventuella källor som en grupp unga männen får information om brott ifrån, hur en rädsla för att utsättas för brott påverkar de unga männen och deras vardagliga liv samt hur denna rädsla tar sig uttryck i d
This thesis performs a critical evaluation of the original Cost-Benefit Analysis (CBA) of the Lund tramway project, focusing on its adherence to the then-current Swedish national appraisal guidelines (ASEK 5) and the accuracy of its demand forecasts. An updated demand forecast and monetary valuation of time savings are constructed and compared to the original CBA projections by using empirical pas
The recent years spread of misinformation and the rise of post-truth politics have challenged the role of public service media in democratic societies. This thesis explores how the Nordic public service broadcasters – SVT, NRK, DR, RÚV and Yle – position themselves in relation to disinformation, misinformation, and post-truth. Through a qualitative, thematic analysis of their annual reports from 2
Abstract: The purpose of this study is to investigate how Russia communicates with their religious and ethnic minorities on the invasion of Ukraine. To do this I have studied the use of the words “shaytany”, “shaytanizatsia” and “desatanizatsia” describing Ukrainians and the invasion of Ukraine in Russian state-controlled media during 2022. My hypothesis was that these words are used in a narrativ
The inclusive cross section for the production of a single top quark in association with a Formula Presented boson is measured using Formula Presented of proton-proton collision data collected with the ATLAS detector at Formula Presented. Events containing two charged leptons and at least one jet identified as originating from a Formula Presented-quark are selected. A multivariate discriminant is
A study of resonant structures in B+→D∗+D-K+ and B+→D∗-D+K+ decays is performed, using proton-proton collision data at center-of-mass energies of s=7, 8, and 13 TeV recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb-1. A simultaneous amplitude fit is performed to the two channels with contributions from resonances decaying to D∗-D+ and D∗+D- states linked by C parit
A search for CP violation in the decay kinematics and vector-boson fusion production of the Higgs boson is performed in the H → ZZ* → 4ℓ (ℓ = e, μ) decay channel. The results are based on proton-proton collision data produced at the LHC at a centre-of-mass energy of 13 TeV and recorded by the ATLAS detector from 2015 to 2018, corresponding to an integrated luminosity of 139 fb−1. Matrix element-ba
