Events - Page 17

Time and place: Sep. 16, 2015 12:15 PM1:00 PM, PGP seminar room (V414, Physics building)

Ben Rogers, Geology MESci Student at the University of Liverpool, will present his work on "Magma ascent in layered elastic media: insights from field studies and analogue experiments".

Time and place: Sep. 9, 2015 1:05 PM, Ø467

Ipsita Mandal, Perimeter institute

We devise a renormalization group analysis for quantum field theories with Fermi surface to study scaling behaviour of non-Fermi liquid states in a controlled approximation. The non-Fermi liquid fixed points are identified from a Fermi surface in (m+1) spatial dimensions, while the co-dimension of Fermi surface is also extended to a generic value. We also study superconducting instability in such systems as a function of dimension and co-dimension of the Fermi surface. The key point in this whole analysis is that unlike in relativistic QFT, the Fermi momentum kF enters as a dimensionful parameter, thus modifying the naive scaling arguments. The effective coupling constants are found to be combinations of the original coupling constants and kF.

The slides are now available.

Time and place: Sep. 4, 2015 3:15 PM4:00 PM, Seminar room (FV414)

Endre Joachim Mossige (Mathematic Department, UiO/Trilobite Microsystems, Kristiansand, Norway), will present us some aspects of his PhD work.

Time and place: Sep. 2, 2015 1:05 PM, Ø467

Tomás Gonzalo, University College London

Grand Unified Theories are a very well motivated extension of the Standard Model, but the landscape of models and possibilities is overwhelming, and different patterns present rather distinct and unique phenomenology. We present in this work a way to automatise the model building process, by considering a top-bottom approach that constructs viable and sensible theories from a small and controllable set of inputs at the high scale. By providing a GUT scale symmetry group and the field content, all the possible symmetry breaking paths are generated and checked for consistency, ensuring anomaly cancellation and Standard Model embedding. We emphasise the usefulness of this process for various models such as a Supersymmetric SO(10) model, a non-SUSY left-right symmetry model or a theory of GUT inflation. 

(Slides are now available).

Time and place: Sep. 2, 2015 12:15 PM1:00 PM, PGP seminar room (V414, Physics building)

Oliver Plümper, Assistant Professor at Utrecht University, will present his work on "The nanoscience of geological processes: From fault friction to reactive fluid flow".

Time and place: Aug. 28, 2015 9:00 AMSep. 6, 2015 6:00 PM, Youngstorget, Oslo

The European Space Expo will visit Oslo, Norway from 28 August to 6 September. During the Space Expo we will give three talks on space and ionospheric research. The talks are open for everybody!

Time and place: Aug. 24, 2015 12:15 PM1:00 PM, Seminar room (FV414)

Semih Turkaya (Institut de Physique du Globe de Strasbourg, France) will present us his PhD work done with his coauthors  Renaud Toussaint, Fredrik Kvalheim Eriksen, Megan Zecevic, Guillaume Daniel, Eirik G. Flekkøy, and Knut Jørgen Måløy.

Time and place: Aug. 23, 2015Aug. 30, 2015, Crete

The conference aims to promote scientific exchange and the development of novel ideas, with a particular emphasis on interdisciplinarity.

Time: Aug. 21, 2015 10:15 AM4:00 PM

Trial lecture title: Anomalous Diffusion: From Condensed Matter and Biological Systems to Financial Markets

Dissertation title: Modelling the onset of frictional sliding: Rupture fronts, slow slip, and time-dependent junction laws

Time and place: Aug. 19, 2015 1:05 PM, Ø467

Yong Tang, KIAS

This talk will discuss some possible connections between neutrinos and dark matter, in light of astrophysical observations. Contents include self-interacting dark matter, sterile neutrinos and IceCube Events. 

The slides are now available.

Time and place: Aug. 10, 2015 12:15 PM1:00 PM, PGP seminar room (V414, Physics building)

Hong-Yan Shih, PhD student at University of Illinois at Urbana-Champaign, willl give a talk on "The emergence of collective modes, ecological collapse and directed percolation at the laminar-turbulence transition in pipe flow​".

Time and place: June 24, 2015 1:05 PM, Ø467

Kalliopi Petraki, NIKEF Amsterdam [slides]

Observations of the galactic and sub-galactic structure of our universe suggest that a shift from the collisionless cold dark matter paradigm may be needed. Dark matter with sizable self-interactions offers a compelling explanation of these observations.

Particle​ ​physics models of self-interacting dark matter can be well accommodated within the asymmetric dark matter scenario. Asymmetric dark matter hypothesizes that the relic dark​ ​matter abundance is due to an excess of dark particles over antiparticles, and allows for sizable and direct couplings of dark matter to light force mediators.

In addition, the dark particle-antiparticle asymmetry may be related to the baryon asymmetry of the universe, thus offering a dynamical explanation for the similarity of the dark and the ordinary matter abundances. Exploring the low-energy phenomenology of self-interacting asymmetric dark matter, including the effect on the dynamics of dark matter halos and possible detection strategies, presupposes understanding the cosmology of these models, which can be quite involved. I will discuss the above, and illustrate them in the context of the atomic dark matter model.

Time and place: June 18, 2015 9:15 AMJune 19, 2015 5:00 PM, Lille Fysiske Auditorium (FV232), Physics Building, UiO

On June 18th and 19th, the “kick-off” seminar for the Strategic Research Intitiative EarthFlows will be arranged in Oslo.

Time and place: June 12, 2015 3:15 PM4:00 PM, Seminar room (FV414)

Talk by François Renard (ISTerre, Univ. Grenoble Alpes & PGP, UiO) in relation with the EarthFlow project, but addressed to a broad audience.

Time and place: June 5, 2015 3:15 PM4:00 PM, PGP-CM seminar room (V414)

Thema 1 of the EarthFlow project will be presented by Olivier Galland (PGP, UiO), Atle Jensen (Department of Mathematics, UiO) and Martin Dabrowski (PGP, UiO).

 

Time and place: June 3, 2015 1:05 PM, Ø467

Kai Schmidt Hoberg, DESY, Hamburg [slides]

I will review motivations for the existence of self interacting dark matter and discuss possible astrophysical observables. Self-interactions of dark matter particles can potentially lead to an observable separation between the dark matter halo and the stars of a galaxy moving through a region of large dark matter density. Such a separation has recently been observed in a galaxy falling into the core of the galaxy cluster Abell 3827. I discuss the DM self-interaction cross section needed to reproduce the observed effects.

Time and place: May 29, 2015 3:15 PM4:00 PM, V 414

Are you also curious to know what research is brewing on the other side of the hall in PGP-AMKS group? We are launching a new Friday seminar event, the Poster Friday, with the first time coming Friday. Please join us, where we kick off this first session with posters involving flow in porous media, microfluidics, visco-elasticity and many things more!  

Time and place: May 29, 2015 1:00 PM2:30 PM, Aud. 467, Theory section

The research centre for dark matter, The Strategic Dark Matter Initiative - SDI, will officially be launched on Friday, and invites you all to a popular science lecture, with coffee and snacks.

Time and place: May 27, 2015 1:05 PM, Ø467

Thomas Jacques, Université de Genève, Switzerland [slides]

As beyond-standard-model physics continues to elude discovery at the LHC, it becomes increasingly important to ask what we can learn about dark matter in a model-independent way. I will introduce the theory and usage of effective operators; these have become popular in recent years as a way to construct model-independent constraints on dark matter, but at LHC energies it is crucial to understand their significance and limitations, and how they can be used to compare the reach of vastly different experiments. With this in mind, I will also discuss the next step beyond effective operators, and techniques to link the search for missing energy with the much-sought-after Dark Matter.

Time: May 22, 2015 3:15 PM4:00 PM

Yi Jing Phua (Postdoctoral Research Fellow at PGP, UiO) will present us her work on biodegradable polymers.

Time and place: May 13, 2015 1:05 PM, Ø467

Mark Burgess

Physics is probably the most successful science when it comes to describing how things behave, but it avoids interpreting the meaning or the intent of behaviours. In technology, especially IT, meaning and intent are at the top of the list when it comes to description, but IT fails to describe system dynamics convincingly. Promise Theory is an attempt to unify dynamical and semantic descriptions of systems, inspired by the successes of physics - and it sheds an interesting light on both fundamental physics and information science.

Time and place: May 7, 2015 12:15 PM1:00 PM, Lille Fysisk Auditorium

Kim Sneppen (Niels Bohr Institute, Univ of Copenhagen) will give a talk in relation with the EarthFlow project, but addressed to a broad audience.

   

Time and place: Apr. 29, 2015 1:05 PM, Ø467

Thomas Schwetz-Mangold, Stockholms Universitet [slides]

The observation of neutrino oscillations requires that neutrinos have a tiny but non-zero mass. This implies that the Standard Model of particle physics has to be extended in some way beyond its original formulation where neutrinos are massless. We review the present status of neutrino oscillations and give a brief outlook on future developments in the field. We speculate on the implications for physics beyond the Standard Model and discuss the challenges to identify the mechanism responsible for neutrino mass.

Time and place: Apr. 24, 2015 3:15 PM4:00 PM, Seminar room (FV414)

Felix Kohler, postdoc at the Condensed matter physic group (UiO), will give a talk.

Time and place: Apr. 24, 2015 2:15 PM, Ø467

Nils-Erik Bomark, University of Warsaw

Within the MSSM, the heavy stops required to meet the experimental value of the Higgs mass, poses tension with naturalness, the main reason to believe in supersymmetry at LHC scales. This is alleviated in the NMSSM, where especially the possibility of a light singlet-like scalar can easily push the Higgs mass up to the measure value.

The presence of a singlet-like scalar and pseudoscalar gives rise to LHC phenomenology potentially rather different from the MSSM as these particles can be very light without coming in conflict with observations. In this presentation I will discuss the discovery prospects of these light pseudoscalars in the NMSSM. As direct production of such singlet-dominated particles is very difficult, the main focus will be on channels where heavier scalars decay to pairs of pseudoscalars or pseusodscalars and Z bosons. I will demonstrate that the LHC should be capable of probing a large part of the NMSSM parameter space through these channels.