• Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton-proton collisions at the LHC 

      Aaboud, Morad; Aad, Georges; Abbott, Brad; Abdallah, Jalal; Abdinov, Ovsat Bahram oglu; Abeloos, Baptiste; Aben, Rosemarie; AbouZeid, Hass; Abraham, Nadine L.; Abramowicz, Halina; Buanes, Trygve; Dale, Ørjan; Eigen, Gerald; Kastanas, Alex; Liebig, Wolfgang; Lipniacka, Anna; Martin dit Latour, Bertrand; Mæland, Steffen; Smestad, Lillian; Stugu, Bjarne; Yang, Zongchang; Zalieckas, Justas; Bugge, Magnar Kopangen; Cameron, David Gordon; Catmore, James Richard; Feigl, Simon; Franconi, Laura; Garonne, Vincent; Gjelsten, Børge Kile; Gramstad, Eirik; Morisbak, Vanja; Nilsen, Jon Kerr; Ould-Saada, Farid; Pajchel, Katarina; Raddum, Silje Hattrem; Read, Alexander Lincoln; Røhne, Ole Myren; Sandaker, Heidi; Serfon, Cédric; Stapnes, Steinar; Strandlie, Are; Abreu, Henso; Abreu, Rômulo F.; Abulaiti, Yiming; Acharya, Bobby S.; Adamczyk, Leszek; Adams, David; Adelman, Jareed; Adersberger, Michael; ATLAS, Collaboration (Peer reviewed; Journal article, 2017-05)
      This paper presents the method and performance of primary vertex reconstruction in proton--proton collision data recorded by the ATLAS experiment during Run 1 of the LHC. The studies presented focus on data taken during ...
    • Recreating the top quark: Commissioning and monitoring of the ATLAS Inner Detector and search for New Physics with heavy particles. 

      Tonoyan, Arshak (Doctoral thesis, 2012-02-03)
      The ATLAS (A Toroidal Lhc ApparatuS) experiment is one of the two general purpose experiments at the Large Hadron Collider (LHC) at CERN, the European Organization for Nuclear Research. The LHC is a proton-proton and ion-ion ...
    • Reducing systematic errors due to deformation of organs at risk in radiotherapy 

      Rørtveit, Øyvind Lunde; Hysing, Liv Bolstad; Stordal, Andreas Størksen; Pilskog, Sara Margareta Cecilia (Journal article; Peer reviewed, 2021)
      Purpose In radiotherapy (RT), the planning CT (pCT) is commonly used to plan the full RT-course. Due to organ deformation and motion, the organ shapes seen at the pCT will not be identical to their shapes during RT. Any ...
    • Reinterpretation of LHC results for new physics: status and recommendations after run 2 

      Athron, Peter; Balázs, Csaba; Buckley, Andy; Gonzalo, Tomas Esteban; Kvellestad, Anders; Osland, Per; Raklev, Are; Scott, Pat (Journal article; Peer reviewed, 2020-08-21)
      We report on the status of efforts to improve the reinterpretation of searches and measurements at the LHC in terms of models for new physics, in the context of the LHC Reinterpretation Forum. We detail current experimental ...
    • The Relationship Between Cusp Region Ion Outflows and East-West Magnetic Field Fluctuations at 4,000-km Altitude 

      Hatch, Spencer Mark; Moretto, Therese; Lynch, Kristina A.; Laundal, Karl Magnus; Gjerloev, J.; Lund, Eric (Journal article; Peer reviewed, 2020)
      A number of interdependent conditions and processes contribute to ionospheric-origin energetic ( ∼ 10 eV to several keV) ion outflows. Due to these interdependences and the associated observational challenges, energetic ...
    • The Relationship Between Large Scale Thermospheric Density Enhancements and the Spatial Distribution of Poynting Flux 

      Billett, Daniel; Clausen, Lasse Boy Novock; Archer, William; McWilliams, Kathryn A.; Håland, Stein Egil; Reistad, Jone Peter; Burchill, J. K.; Patrick, M. R.; Humberset, Beate Krøvel; Anderson, B. J.; Perry, G. W. (Journal article; Peer reviewed, 2021)
      Large thermospheric neutral density enhancements in the cusp region have been examined for many years. The Challenging Minisatellite Payload (CHAMP) satellite for example has enabled many observations of the perturbation, ...
    • Relationship Between Microbial Growth and Hydraulic Properties at the Sub-Pore Scale 

      Hassannayebi, Neda; Jammernegg, Boris; Schritter, Johanna; Arnold, Pit; Enzmann, Frieder; Kersten, Michael; Loibner, Andreas P.; Fernø, Martin; Ott, Holger (Journal article; Peer reviewed, 2021)
      Accumulation of microbial biomass and its influence on porous media flow were investigated under saturated flow conditions. Microfluidic experiments were performed with model organisms, and their accumulation was observed ...
    • Relative particle yield fluctuations in Pb--Pb collisions at √sNN=2.76 TeV 

      Acharya, Shreyasi; Adamová, Dagmar; Adolfsson, Jonatan; Aggarwal, Madan M.; Aglieri Rinella, Gianluca; Agnello, Michelangelo; Agrawal, Neelima; Ahammed, Zubayer; Ahn, Sang Un; Aiola, Salvatore; Alme, Johan; Altenkaemper, Lucas; Fionda, Fiorella Maria Celeste; Lønne, Per-Ivar; Nystrand, Joakim; Rehman, Attiq ur; Tambave, Ganesh Jagannath; Ullaland, Kjetil; Velure, Arild; Wagner, Boris; Zhang, Hui; Zhou, Zhuo; Zhu, Hongsheng; Arsene, Ionut Cristian; Bätzing, Paul Christoph; Dordic, Olja; Lardeux, Antoine Xavier; Lindal, Svein; Mahmood, Sohail Musa; Richter, Matthias; Røed, Ketil; Skaali, Toralf Bernhard; Tveter, Trine Spedstad; Wikne, Jon Christopher; Zhao, Chengxin; Helstrup, Håvard; Hetland, Kristin Fanebust; Kileng, Bjarte; Nesbø, Simon Voigt; Storetvedt, Maksim Melnik; Langøy, Rune; Lien, Jørgen André; Akindinov, Alexander; Al-Turany, Mohammed; Alam, Sk Noor; De Albuquerque, Danilo Silva; Aleksandrov, Dimitry; Alessandro, Bruno; Alfaro Molina, José Rubén; Ali, Yasir Turki Ben; ALICE, Collaboration (Peer reviewed; Journal article, 2019)
      First results on K/π, p/π and K/p fluctuations are obtained with the ALICE detector at the CERN LHC as a function of centrality in Pb--Pb collisions at sNN−−−√=2.76 TeV. The observable νdyn, which is defined in terms of ...
    • Relativistic effects in photoionizing a circular Rydberg state in the optical regime 

      Kjellsson Lindblom, Tor Hugo Iwao; Lindroth, Eva; Førre, Morten; Selstø, Sølve (Journal article; Peer reviewed, 2020)
      We study the photoionization process of a hydrogen atom initially prepared in a circular Rydberg state. The atom is exposed to a two-cycle laser pulse with a central wavelength of 800 nm. Before the atom approaches saturation, ...
    • Resolution of the ATLAS muon spectrometer monitoreddrift tubes in LHC Run 2 

      Aad, Georges; Abbott, Brad; Abbott, Dale C.; Abdinov, Ovsat Bahram oglu; Abed Abud, Adam; Abeling, Kira; Abhayasinghe, Deshan Kavishka; Abidi, Syed Haider; AbouZeid, Hass; Abraham, Nadine L.; Bjørke, Kristian; Bugge, Magnar Kopangen; Cameron, David Gordon; Catmore, James Richard; Feigl, Simon; Garonne, Vincent; Gramstad, Eirik; Hellesund, Simen; Morisbak, Vanja; Oppen, Henrik; Ould-Saada, Farid; Pedersen, Maiken; Read, Alexander Lincoln; Rye, Eli Bæverfjord; Røhne, Ole Myren; Sandaker, Heidi; Vadla, Knut Oddvar Høie; Buanes, Trygve; Djuvsland, Julia Isabell; Eigen, Gerald; Fomin, Nikolai; Lee, Graham Richard; Lipniacka, Anna; Martin dit Latour, Bertrand; Mæland, Steffen; Stugu, Bjarne; Træet, Are Sivertsen; Abramowicz, Halina; Abreu, Henso; Abulaiti, Yiming; Acharya, Bobby S.; Achkar, Baida; Adachi, Shunsuke; Adam, Lennart; Adam-Bourdarios, Claire; Adamczyk, Leszek; Adelman, Jareed; Adersberger, Michael; Adigüzel, Aytül; Adorni, Sofia; ATLAS, Collaboration (Peer reviewed; Journal article, 2019)
      The momentum measurement capability of the ATLAS muon spectrometer relies fundamentally on the intrinsic single-hit spatial resolution of the monitored drift tube precision tracking chambers. Optimal resolution is achieved ...
    • Resonances in e+e- annihilation near 2.2 GeV 

      Lees, Jean-Pierre; Poireau, Vincent; Tisserand, Vincent; Grauges, Eugeni; Palano, Antimo; Eigen, Gerald; Brown, David Nathan; Kolomensky, Yury G.; Fritsch, Miriam; Koch, Helmut; Schroeder, Torsten; Cheaib, Racha; Hearty, Christopher; Mattison, Tom S.; McKenna, Janis A.; So, Rocky Y.; Blinov, Vladimir E.; Buzykaev, Alexey; Druzhinin, Vladimir P.; Golubev, Vladimir B.; Kozyrev, Evgeny A.; Kravchenko, Evgeniy A.; Onuchin, Alexei P.; Serednyakov, Sergey I.; Skovpen, Yuri I.; Solodov, Evgeni Petrovich; Todyshev, Korneliy Yu.; Lankford, Andrew J.; Dey, Biplab; Gary, J. William; Long, Owen; Eisner, Alan M.; Lockman, William S.; Panduro-Vazquez, William; Chao, Daniel S.; Cheng, Chih-Hsiang; Echenard, Bertrand; Flood, Kevin T.; Hitlin, David G.; Kim, Jae; Lee, Myeongjae; Miyashita, Tomonari S.; Ongmongkolkul, Piti; Porter, Frank C.; Röhrken, Markus; Huard, Zachary; Meadows, Brian T.; Pushpawela, Buddhi G.; Sokoloff, Michael D.; Sun, Liang; BABAR, Collaboration (Journal article; Peer reviewed, 2020-01-22)
      Using the initial-state radiation method, the e+e−→KSKL cross section from 1.98 to 2.54 GeV is measured in a data sample of 469 fb−1 collected with the BABAR detector. The results are used in conjunction with previous BABAR ...
    • The response of permafrost and high latitude ecosystems under large scale stratospheric aerosol injection and its termination 

      Lee, Hanna; Ekici, Altug; Tjiputra, Jerry; Muri, Helene; Chadburn, Sarah E.; Lawrence, David M.; Schwinger, Jörg (Peer reviewed; Journal article, 2019-04-15)
      Climate engineering arises as one of the potential methods that could contribute to meeting the 1.5oC global warming target agreed under the Paris Agreement. We examine how permafrost and high latitude vegetation respond ...
    • Results from the intercalibration of optical low light calibration sources 2011 

      Brändström, B. Urban E.; Enell, Carl-Fredrik; Widell, Ola; Hansson, Thord; Whiter, Daniel; Mäkinen, Sanna; Mikhaylova, Daria; Axelsson, Katarina; Sigernes, Fred; Gulbrandsen, Njål; Schlatter, Nicola M.; Gjendem, Amund Gjerde; Cai, L.; Reistad, Jone Peter; Daae, Marianne; Demissie, Teferi Dejene; Andalsvik, Yngvild Linnea; Roberts, Owen; Poluyanov, Stepan Viktorovich; Chernouss, Sergey (Peer reviewed; Journal article, 2012-05-03)
      Following the 38th Annual European Meeting on Atmospheric Studies by Optical Methods in Siuntio in Finland, an intercalibration workshop for optical low light calibration sources was held in Sodankylä, Finland. The main ...
    • Results of the Electron Drift Instrument on Cluster 

      Paschmann, G; Quinn, Jack M.; Torbert, R.B.; McIllwain, C; Vaith, H; Haaland, S.; Matsui, Hiroshi; Kletzing, Craig A.; Baumjohann, W; Haerendel, G (Journal article; Peer reviewed, 2021)
      The electron drift instrument (EDI) on Cluster pioneered a new method of measuring electric fields, using a beam of electrons to sample the drift velocity over a km-scale gyro orbit. The technique is especially well suited ...
    • Retrieval practice of a hierarchical principle structure in university introductory physics: Making stronger students 

      Gjerde, Vegard; Holst, Bodil; Kolstø, Stein Dankert (Journal article; Peer reviewed, 2020)
      Introductory physics is taught to several hundred thousand university students every year. It is seen as especially difficult by many and the failure rate is often high. A relevant question is whether one can increase the ...
    • Revisiting transverse momentum broadening in dense QCD media 

      Barata, João; Mehtar-Tani, Yacine; Soto-Ontoso, Alba; Tywoniuk, Konrad (Journal article; Peer reviewed, 2021)
      We reconsider the problem of transverse momentum broadening of a highly energetic parton suffering multiple scatterings in dense colored media, such as the thermal quark-gluon plasma or large nuclei. In the framework of ...
    • Rheological properties of hydrophobically modified anionic polymers: The effect of varying salinity in polymer solution 

      Time, Peter Aarrestad (Master thesis, 2017-06-16)
      A new class of polymers, named ‘hydrophobically modified water-soluble polymers’, has been developed as an alternative to the more commonly used polyelectrolytes in enhanced oil recovery (EOR) applications. These polymers ...
    • Rheology of Synthetic Polymers in Porous Media 

      Larsen, Jørgen Omre (Master thesis, 2014-06-02)
      This master thesis is written out of the Centre for Integrated Petroleum Research (UNI CIPR) at the University of Bergen (UiB). The aim of this study has been to describe the polymer rheology of the high molecular weight ...
    • Risiko for spredning av flammer og røyk gjennom brannskiller ved endringer i bruk av sprinkler og røykkontroll i boligkvarter på petroleumsinnretninger. 

      Hauken, Jan-Øivind (Master thesis, 2016-09-27)
      Målet med oppgaven har vært å undersøke hvordan endringer i bruk av sprinkler og brannspjeld i boligkvarter på petroleumsinnretninger, har påvirket risiko for spredning av flammer og røyk gjennom ventilasjonskanaler. ...