Now showing items 240-259 of 1535

• Dielectron measurements in pp and Pb–Pb colllisions with ALICE at the LHC ﻿

(Peer reviewed; Journal article, 2019)
The production of low-mass dielectrons is one of the most promising tools for the investigation of chiral symmetry restoration and thermal radiation from the QGP created in heavy-ion collisions. To single out the signal ...
• Dielectron production in proton-proton and proton-lead collisions at √sNN=5.02TeV ﻿

(Journal article; Peer reviewed, 2020-11-25)
The first measurements of dielectron production at midrapidity (|ηe|<0.8) in proton–proton and proton–lead collisions at √sNN=5.02 TeV at the LHC are presented. The dielectron cross section is measured with the ALICE ...
• Dielectron production in proton-proton collisions at √s=7 TeV ﻿

(Peer reviewed; Journal article, 2018-09-12)
The first measurement of e^+e^− pair production at mid-rapidity (|ηe| < 0.8) in pp collisions at √s=7 TeV with ALICE at the LHC is presented. The dielectron production is studied as a function of the invariant mass (m_ee ...
• Differential studies of inclusive J/$psi$ and $\psi$(2S) production at forward rapidity in Pb-Pb collisions at $\mathbf{\sqrt{{\textit s}_{_{NN}}}}$ = 2.76 TeV ﻿

(Peer reviewed; Journal article, 2016-05)
The production of J/\).psi\) and $\psi(2S)$ was measured with the ALICE detector in Pb-Pb collisions at the LHC. The measurement was performed at forward rapidity $2.5 < y < 4 \() down to zero transverse momentum ... • Diffusion as an Oil Recovery Mechanism During CO2 Injection in Fractured Reservoirs ﻿ (Master thesis, 2013-11-19) This thesis is part of an ongoing study of enhanced oil recovery by CO2 injection in the Reservoir Physics research group at the Department of Physics and Technology (IFT) at the University of Bergen. This work investigates ... • A Digital Tracking Calorimeter for Proton Computed Tomography ﻿ (Doctoral thesis, 2018-05-29) Cancer is a destructive disease, in which tumor cells grow out-of-control, halting organ function. Its treatment is threefold: Radical surgery, chemotherapy and radiation therapy. Their relative usage is determined by ... • Dijet azimuthal correlations and conditional yields in pp and p+Pb collisions at √sNN = 5.02 TeV with the ATLAS detector ﻿ (Peer reviewed; Journal article, 2019) This paper presents a measurement of forward-forward and forward-central dijet azimuthal angular correlations and conditional yields in proton-proton (pp) and proton-lead (p + Pb) collisions as a probe of the nuclear gluon ... • Dijet resonance search with weak supervision using √s = 13 TeV pp collisions in the ATLAS detector ﻿ (Journal article; Peer reviewed, 2020-09-21) This Letter describes a search for narrowly resonant new physics using a machine-learning anomaly detection procedure that does not rely on signal simulations for developing the analysis selection. Weakly supervised learning ... • Direct and indirect electron precipitation effect on nitric oxide in the polar middle atmosphere, using a full-range energy spectrum ﻿ (Peer reviewed; Journal article, 2017) In April 2010, a coronal mass ejection and a corotating interaction region on the Sun resulted in an energetic electron precipitation event in the Earth’s atmosphere. We investigate direct and indirect nitric oxide (NO) ... • Direct photon elliptic flow in Pb–Pb collisions at √sNN=2.76 TeV ﻿ (Peer reviewed; Journal article, 2019-02-10) The elliptic flow of inclusive and direct photons was measured at mid-rapidity in two centrality classes 0–20% and 20–40% in Pb–Pb collisions at TeV by ALICE. Photons were detected with the highly segmented electromagnetic ... • Direct photon elliptic flow in Pb–Pb collisions at √sNN=2.76 TeV ﻿ (Peer reviewed; Journal article, 2019) The elliptic flow of inclusive and direct photons was measured by ALICE for central and semi-central Pb–Pb collisionsat√sNN=2.76 TeV. The photons were reconstructed using the electromagnetic calorimeter PHOS and the ... • Direct photon production at low transverse momentum in proton-proton collisions at √s=2.76 and 8 TeV ﻿ (Peer reviewed; Journal article, 2019) Measurements of inclusive and direct photon production at midrapidity in pp collisions at √s = 2.76 and 8 TeV are presented by the ALICE experiment at the LHC. The results are reported in transverse momentum ranges of 0.4 ... • Direct photon production in Pb-Pb collisions at \(\sqrt{s_{NN}}$=2.76 TeV ﻿

(Peer reviewed; Journal article, 2016-03)
Direct photon production at mid-rapidity in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV was studied in the transverse momentum range $0.9 < p_{\rm T} < 14$ GeV/$c$, Photons were detected via conversions in the ...
• Direct top-quark decay width measurement in the tt¯lepton+jets channel at √s=8 TeV with the ATLAS experiment ﻿

(Peer reviewed; Journal article, 2018-02-15)
This paper presents a direct measurement of the decay width of the top quark using tt¯ events in the lepton+jets final state. The data sample was collected by the ATLAS detector at the LHC in proton–proton collisions at a ...
• Direct two-photon double ionization of H2 ﻿

(Peer reviewed; Journal article, 2012-06-05)
We have studied the process of direct (nonsequential) two-photon double ionization of molecular hydrogen (H2). Solving the time-dependent Schr¨odinger equation by an ab initio method, total (generalized) and singledifferential ...
• Directed flow of charged particles at mid-rapidity relative to the spectator plane in Pb-Pb collisions at $\sqrt{s_{NN}}$=2.76 TeV ﻿

(Peer reviewed; Journal article, 2013-12)
The directed flow of charged particles at midrapidity is measured in Pb-Pb collisions at $\sqrt{s_{NN}}$.2.76 TeV relative to the collision plane defined by the spectator nucleons. Both, the rapidity odd $v_1^{odd}$ ...
• Directed Network of Substorms Using SuperMAG Ground‐Based Magnetometer Data ﻿

(Peer reviewed; Journal article, 2019)
We quantify the spatiotemporal evolution of the substorm ionospheric current system utilizing the SuperMAG 100+ magnetometers. We construct dynamical directed networks from this data for the first time. If the canonical ...
• Dispersion and two-phase flow in material from different carbonate pore classes ﻿

(Master thesis, 2008-06-02)
Carbonate reservoirs are currently estimated to contain more than 50 % of the world's oil reserves. The economical value of improving knowledge on fluid flow in these reservoirs is therefore vast. Carbonate reservoirs are ...
• Distribution of energetic oxygen and hydrogen in the near-Earth plasma sheet ﻿

(Peer reviewed; Journal article, 2015-05)
The spatial distributions of different ion species are useful indicators for plasma sheet dynamics. In this statistical study based on 7 years of Cluster observations, we establish the spatial distributions of oxygen ions ...
• Dos and Don’ts When Developing a System to Investigate Spontaneous Imbibition in Unconsolicdated Porous Media ﻿

(Peer reviewed; Journal article, 2019)
This paper describes the development of a consistent model system to measure spontaneous imbibition and determine saturation functions in unconsolidated porous media. Sand grains or glass beads were packed in up to 0.5 m ...