### Recent Submissions

• #### Search for Pair Production of Bottom-Squarks in Final States with Hadronically Decaying Tau-leptons, b-jets and missing transverse momentum with the ATLAS Detector at the Large Hadron Collider ﻿

(The University of Bergen, 2020-10-16)
In this thesis a search for beyond the Standard Model physics, in particular for bottom-squark pairs in events with missing transverse momentum, b-tagged jets and hadronically decaying tau leptons is documented. The dataset ...
Doctoral thesis
• #### A neutral matter-wave microscope (NEMI): Design and setup ﻿

(The University of Bergen, 2012-03-09)
Matter wave microscopes such as electron microscopes or helium ion microscopes are vital tools in numerous fields of sciences. This thesis presents the design of a new matter wave microscope using neutral helium atoms ...
Doctoral thesis
• #### Måling av ekvivalent åpningsvinkel for et 38 kHz fiskeri ekkolodd. Kalibrering av ekkolodd ved bruk av flere svingere ﻿

(The University of Bergen, 2020-08-09)
Master thesis
• #### Combined Thickness and Permittivity Measurement of Thin Layers with Open-Ended Coaxial Probes ﻿

(MDPI, 2019-04-12)
This paper presents a method to simultaneously determine the thickness and permittivity of thin layers from multi-frequency reflection coefficient measurements using an open-ended coaxial probe. This is achieved by exploiting ...
Journal article
• #### Comparison of fragmentation functions for jets dominated by light quarks and gluons from pp and Pb+Pb collisions in ATLAS ﻿

(APS, 2019)
Charged-particle fragmentation functions for jets azimuthally balanced by a high-transverse-momentum, prompt, isolated photon are measured in 25 pb − 1 of p p and 0.49 nb − 1 of Pb + Pb collision data at 5.02 TeV per nucleon ...
Journal article
• #### Constraining production models with light (anti-)nuclei measurements in small systems with ALICE at the LHC ﻿

(Elsevier, 2019)
The production of deuterons and anti-deuterons in pp collisions at √s = 7 and 13 TeV has been studied as a function of charged-particle multiplicity using the ALICE detector at the LHC. The preliminary results are shown ...
Journal article
• #### Constraints on mediator-based dark matter and scalar dark energy models using √s = 13 TeV pp collision data collected by the ATLAS detector ﻿

(Springer, 2019)
Constraints on selected mediator-based dark matter models and a scalar dark energy model using up to 37 fb−1s√ = 13 TeV pp collision data collected by the ATLAS detector at the LHC during 2015-2016 are summarised in this ...
Journal article
• #### Correlated long-range mixed-harmonic fluctuations measured in pp, p+Pb and low-multiplicity Pb+Pb collisions with the ATLAS detector ﻿

(Elsevier, 2019)
Correlations of two flow harmonics vn and vm via three- and four-particle cumulants are measured in 13 TeV pp, 5.02 TeV p+Pb, and 2.76 TeV peripheral Pb+Pb collisions with the ATLAS detector at the LHC. The goal is to ...
Journal article
• #### An explicit IMF By dependence on solar wind ‐ magnetosphere coupling ﻿

(American Geophysical Union, 2019)
Presently, all empirical coupling functions quantifying the solar wind—magnetosphere energy—or magnetic flux conversion assume that the coupling is independent of the sign of the dawn-dusk component (B𝑦) of the ...
Journal article
• #### Cross-section measurements of the Higgs boson decaying into a pair of τ-leptons in proton-proton collisions at √s=13  TeV with the ATLAS detector ﻿

(APS, 2019)
A measurement of production cross sections of the Higgs boson in proton-proton collisions is presented in the H → τ τ decay channel. The analysis is performed using 36.1     fb − 1 of data recorded by the ATLAS experiment ...
Journal article
• #### Interplanetary Magnetic Field Control of Polar Ionospheric Equivalent Current System Modes ﻿

(AGU, 2019)
We analyze the response of different ionospheric equivalent current modes to variations in the interplanetary magnetic field (IMF) components By and Bz. Each mode comprises a fixed spatial pattern whose amplitude varies ...
Journal article
• #### Investigating correlated fluctuations of conserved charges with net-Λ fluctuations in Pb–Pb collisions at ALICE ﻿

(Elsevier, 2019)
Event-by-event fluctuations of conserved charges – such as electric charge, strangeness, and baryon number – in ultrarelativistic heavy-ion collisions provide insight into the properties of the quark-gluon plasma and the ...
Journal article
• #### Investigations of anisotropic flow using multiparticle azimuthal correlations in pp, p−Pb, Xe-Xe, and Pb-Pb collisions at the LHC ﻿

(APS, 2019)
Measurements of anisotropic flow coefficients ( v n ) and their cross-correlations using two- and multiparticle cumulant methods are reported in collisions of p p at √ s = 13 TeV , p − Pb at a center-of-mass energy per ...
Journal article
• #### Intercomparison of the POES/MEPED Loss Cone Electron Fluxes With the CMIP6 Parametrization ﻿

(American Geophysical Union, 2019)
Quantitative measurements of medium energy electron (MEE) precipitation (>40 keV) are a key to understand the total effect of particle precipitation on the atmosphere. The Medium Energy Proton and Electron Detector (MEPED) ...
Journal article
• #### Inferring source properties of monoenergetic electron precipitation from kappa and Maxwellian moment‐voltage relationships ﻿

(American Geophysical Union, 2019)
Journal article
• #### Light (anti-)nuclei production and elliptic flow at the LHC with ALICE ﻿

(Elsevier, 2019)
Results on the production of stable light nuclei, including deuterons, 3He, 4He and the corresponding anti-nuclei, in Pb–Pb collisions at √sNN = 2.76 TeV and √sNN = 5.02 TeV are presented and compared with theoretical ...
Journal article
• #### Magnetic Effects of Plasma Pressure Gradients in the Upper F Region ﻿

(AGU, 2019)
The Swarm satellites fly at altitudes that at polar latitudes are generally assumed to only contain currents that are aligned with the local magnetic field. Therefore, disturbances along the main field direction are mainly ...
Journal article
• #### Measurement of angular and momentum distributions of charged particles within and around jets in Pb+Pb and pp collisions at √sNN=5.02 TeV with the ATLAS detector ﻿

(APS, 2019)
Studies of the fragmentation of jets into charged particles in heavy-ion collisions can provide information about the mechanism of jet quenching by the hot and dense QCD matter created in such collisions, the quark-gluon ...
Journal article
• #### Measurement of charged jet cross section in pp collisions at √s=5.02  TeV ﻿

(APS, 2019)
The cross section of jets reconstructed from charged particles is measured in the transverse momentum range of 5 < p T < 100     GeV / c in p p collisions at the center-of-mass energy of √ s = 5.02     TeV with the ALICE ...
Journal article
• #### Measurement of the top quark mass in the tt¯→lepton+jets channel from √s=8 TeV ATLAS data and combination with previous results ﻿

(Springer, 2019)
The top quark mass is measured using a template method in the tt¯→lepton+jets channel (lepton is e or μ) using ATLAS data recorded in 2012 at the LHC. The data were taken at a proton–proton centre-of-mass energy of s√=8 ...
Journal article