### Recent Submissions

• #### Solar Wind and Seasonal Influence on Ionospheric Currents From Swarm and CHAMP Measurements ﻿

(American Geophysical Union, 2018-05-29)
We present a new climatological model of the ionospheric current system, determined from magnetic measurements taken by the Challenging Minisatellite Payload (CHAMP) and Swarm satellites. The model describes the horizontal ...
Journal article
• #### Simulations of Busy Probabilities in the ALPIDE Chip and the Upgraded ALICE ITS Detector ﻿

(Sissa, 2018)
For the Long Shutdown 2 (LS2) upgrade of the ITS detector in the ALICE experiment at the LHC, a novel pixel detector chip, the ALPIDE chip, has been developed. In the event of busy ALPIDE chips in the ITS detector, the ...
Journal article
• #### Search for pair and single production of vectorlike quarks in final states with at least one Z boson decaying into a pair of electrons or muons in pp collision data collected with the ATLAS detector at √s=13  TeV ﻿

(American Physical Society, 2018-12-20)
A search for vectorlike quarks is presented, which targets their decay into a Z boson and a thirdgeneration Standard Model quark. In the case of a vectorlike quark T (B) with charge þ2=3e (−1=3e), the decay searched for ...
Journal article
• #### Search for flavor-changing neutral currents in top quark decays t→Hc and t→Hu in multilepton final states in proton-proton collisions at √s=13  TeV with the ATLAS detector ﻿

(American Physical Society, 2018-08-06)
Flavor-changing neutral currents are not present in the Standard Model at tree level and are suppressed in loop processes by the unitarity of the Cabibbo-Kobayashi-Maskawa matrix; the corresponding rates for top quark ...
Journal article
• #### Measurement of the Higgs boson mass in the H → ZZ⁎ → 4ℓ and H → γγ channels with √s = 13 TeV pp collisions using the ATLAS detector ﻿

(Elsevier, 2018-09-10)
The mass of the Higgs boson is measured in the H → Z Z∗ → 4 and in the H → γγ decay channels with 36.1 fb−1 of proton–proton collision data from the Large Hadron Collider at a centre-of-mass energy of 13 TeV recorded by ...
Journal article
• #### Measurement of jet fragmentation in Pb+Pb and pp collisions at √sNN=5.02 TeV with the ATLAS detector ﻿

(American Physical Society, 2018-08-16)
This paper presents a measurement of jet fragmentation functions in 0.49 nb−1 of Pb+Pb collisions and 25 pb−1 of pp collisions at √sNN = 5.02 TeV collected in 2015 with the ATLAS detector at the LHC. These measurements provide ...
Journal article
• #### Search for resonances in the mass distribution of jet pairs with one or two jets identified as b-jets in proton-proton collisions at √s=13  TeV with the ATLAS detector ﻿

(American Physical Society, 2018-08-30)
A search for new resonances decaying into jets containing b-hadrons in pp collisions with the ATLAS detector at the LHC is presented in the dijet mass range from 0.57 to 7 TeV. The data set corresponds to an integrated ...
Journal article
• #### Search for heavy resonances decaying to a photon and a hadronically decaying Z/W/H boson in pp collisions at √s=13  TeV with the ATLAS detector ﻿

(American Physical Society, 2018-08-28)
Many extensions of the Standard Model predict new resonances decaying to a Z, W, or Higgs boson and a photon. This paper presents a search for such resonances produced in pp collisions at ffiffi s p ¼ 13 TeV using a ...
Journal article
• #### Search for new phenomena in events with same-charge leptons and b-jets in pp collisions at √s=13TeV with the ATLAS detector ﻿

(Springer, 2018-12-07)
A search for new phenomena in events with two same-charge leptons or three leptons and jets identified as originating from b-quarks in a data sample of 36.1 fb−1 of pp collisions at √ s = 13 TeV recorded by the ATLAS ...
Journal article
• #### Parameter Scans and Machine Learning for beyond Standard Model Physics ﻿

(The University of Bergen, 2019-05-02)
This thesis focuses on different beyond Standard Model theories, and the use of statistical methods to investigate them. Supersymmetry is considered in different contexts. First, the supersymmetry breaking scheme of ...
Doctoral thesis
• #### Trilinear-augmented gaugino mediation ﻿

(Springer, 2017-05-02)
We consider a gaugino-mediated supersymmetry breaking scenario where in addition to the gauginos the Higgs fields couple directly to the field that breaks supersymmetry. This yields non-vanishing trilinear scalar couplings ...
Journal article
• #### Search for R-parity-violating supersymmetric particles in multi-jet final states produced in p–p collisions at √s = 13 TeV using the ATLAS detector at the LHC ﻿

(Elsevier, 2018-11)
Results of a search for gluino pair production with subsequent R-parity-violating decays to quarks are presented. This search uses 36.1 fb−1 of data collected by the ATLAS detector in proton–proton collisions with a ...
Journal article
• #### Search for low-mass dijet resonances using trigger-level jets with the ATLAS detector in pp collisions at √s=13  TeV ﻿

(American Physical Society, 2018-08)
Searches for dijet resonances with sub-TeV masses using the ATLAS detector at the Large Hadron Collider can be statistically limited by the bandwidth available to inclusive single-jet triggers, whose data-collection rates ...
Journal article
• #### Search for supersymmetry in events with four or more leptons in √s=13  TeV pp collisions with ATLAS ﻿

(American Physical Society, 2018-08)
Results from a search for supersymmetry in events with four or more charged leptons (electrons, muons and taus) are presented. The analysis uses a data sample corresponding to 36.1  fb−1 of proton–proton collisions delivered ...
Journal article
• #### Observation of centrality-dependent acoplanarity for muon pairs produced via two-photon scattering in Pb+Pb collisions at √sNN=5.02  TeV with the ATLAS detector ﻿

(American Physical Society, 2018-11)
This Letter presents a measurement of γγ→μ+μ− production in Pb+Pb collisions recorded by the ATLAS detector at the Large Hadron Collider at √sNN=5.02  TeV with an integrated luminosity of 0.49  nb−1. The azimuthal angle ...
Journal article
• #### Measurement of dijet azimuthal decorrelations in pp collisions at √s=8  TeV with the ATLAS detector and determination of the strong coupling ﻿

(American Physical Society, 2018-11-07)
A measurement of the rapidity and transverse momentum dependence of dijet azimuthal decorrelations is presented, using the quantity RΔϕ. The quantity RΔϕ specifies the fraction of the inclusive dijet events in which the ...
Journal article
• #### The asymmetric geospace as displayed during the geomagnetic storm on 17 August 2001 ﻿

(Copernicus Publications, 2018-11-29)
Previous studies have shown that conjugate auroral features are displaced in the two hemispheres when the interplanetary magnetic field (IMF) has a transverse (Y) component. It has also been shown that a BY component is ...
Journal article
• #### Measurement of D0, D+, D*+ and D s + production in Pb-Pb collisions at √sNN=5.02TeV ﻿

(Springer, 2018-10)
We report measurements of the production of prompt D0, D+, D*+ and D s + mesons in Pb–Pb collisions at the centre-of-mass energy per nucleon-nucleon pair sNN−−−√=5.02 TeV, in the centrality classes 0–10%, 30–50% and ...
Journal article
• #### Signal mixture estimation for degenerate heavy Higgses using a deep neural network ﻿

(Springer, 2018-12)
If a new signal is established in future LHC data, a next question will be to determine the signal composition, in particular whether the signal is due to multiple near-degenerate states. We investigate the performance of ...
Journal article
• #### Observations of asymmetries in ionospheric return flow during different levels of geomagnetic activity ﻿

(Wiley, 2018-06)
It is known that the magnetic field of the Earth's closed magnetosphere can be highly displaced from the quiet‐day configuration when interacting with the interplanetary magnetic field (IMF), an asymmetry largely controlled ...
Journal article