Events - Page 19

Time and place: Jan. 9, 2015 3:15 PM4:00 PM, PGP seminar room (FV414)

Yuri Galperin, professor emeritus in the AMKS/Complex matter group at the UiO, will give a popular presentation of basic concepts behind the Nobel Prize in Physics 2014, given "for the invention of efficient blue light-emitting diodes which has enabled bright and energy-saving white light sources”.

Time and place: Dec. 17, 2014 12:15 PM1:15 PM, PGP seminar room (V414, Physics building)

Endre Joachim Mossige, student at Mathematic Department at UiO, will present his work on "Calibration of a microPIV/PTV-system and Effects of Particles being slightly out of Focus on Velocity Measurements".

Time and place: Dec. 12, 2014 3:15 PM4:00 PM, PGP seminar room (FV414)

Jan Svennevig from the Institutt for lingvistiske og nordiske studier at the UiO, will tell us more about how to understand each other in a second language.

Time and place: Dec. 9, 2014 10:00 AMDec. 11, 2014 1:00 PM, LilleFy
Time and place: Dec. 5, 2014 3:15 PM4:00 PM, PGP Seminar room (F414)

Eivind Nicolai Lauritsen (Aftenposten Viten) will give you a primer in how to present your work to the broader public – and more importantly, make you understand why you should.

Time and place: Nov. 28, 2014 3:15 PM4:00 PM, Seminar room (FV414)

David Fonseca Mota from the Institute of Theoretical Astrophysics at UiO will present us his work.

Time and place: Nov. 26, 2014 1:05 PM, FØ467

Jesús Zavala Franco, University of Copenhagen [slides]

 

Although there is substantial gravitational evidence for the existence of dark matter, its nature as a new particle beyond the Standard Model remains one of the biggest mysteries in modern astrophysics. The favourite theoretical model, Cold Dark Matter (CDM), assumes that non-gravitational dark matter interactions are irrelevant for galaxy formation and evolution.

Surprisingly, there is no strong evidence for the CDM hypothesis. Current astronomical observations allow significant departures that have a relevant impact on our understanding of how galaxies form and evolve. Moreover, the observed properties of the smallest galaxies have been consistently in conflict with the predictions of the CDM model.

In this talk, I will argue that to explain galaxy formation and evolution in the broadest sense, an effective dark matter theory must contain a wider range of dark matter particle physics without spoiling the success of CDM in reproducing the large-scale structure of the Universe, while addressing its outstanding challenges at the scales of individual galaxies.

Time and place: Nov. 19, 2014 12:15 PM1:15 PM, PGP seminar room (V414)

Benjy Marks, postdoc at Physics Department, will present some of PhD work on "How big things are (inside avalanches)"

Time and place: Nov. 14, 2014 3:15 PM4:00 PM, PGP seminar room (FV414)

Susan Braovac (Kulturhistorisk museum, UiO) will present us...

Time and place: Nov. 12, 2014 11:15 AM1:15 PM, PGP seminar room (V414)

Joakim Bergli, Ass. Prof. at Physics Department, will talk about "Maxwell's demon: an old thougth experiment with continued interest and the possibility of new real experiments"

Time and place: Nov. 10, 2014 1:15 PM4:00 PM, Auditorium 2, Helga Engs hus

Thesis title: Carbonation of ultramafic rock: Mechanochemical aspects

Time and place: Nov. 7, 2014 3:15 PM4:00 PM, PGP seminar room (FV414)

Elen Roaldset from the Natural History Museum at the UiO will tell us more about the Oslo's Opera house...

Time and place: Nov. 6, 2014 1:05 PM, FØ467

Ivica Picek, Univ. of Zagreb

After the discovery of the Higgs boson, searching for the dark matter (DM) is one of the main targets for the LHC. In light of evidence for neutrino mass it would be appealing that DM particles account for a solution to the small neutrino mass. A radiative neutrino mass realization dubbed  "scotogenic" (with DM particles in a loop) imposes an exactly conserved Z_2 symmetry to eliminate tree-level neutrino masses and to simultaneously stabilize a DM candidate.

In this talk I will discuss the possibility to avoid such ad hoc Z_2 symmetry: either by promoting it to a local gauge U(1)_D symmetry or by requiring that it arises "accidentally" (on account of the SM symmetry and a choice of the field content). In this context, I will discuss the testability of Majorana singlet, triplet  and quintet DM candidates at the LHC.

Time and place: Nov. 5, 2014 1:05 PM, FØ467

Alejandro Ibarra, Technische Universität München [slides]

The search for the gamma-rays which are presumably produced in dark matter annihilations is hindered by the existence of large, and still poorly understood, astrophysical backgrounds. In this talk we will emphasize the importance of sharp spectral features for the identification of a dark matter signal. We will review the status of the search of the various spectral features that arise in Particle Physics scenarios and we will discuss the interplay with other search strategies.

Time and place: Nov. 5, 2014 12:15 PM1:15 PM, PGP seminar room (V414)

Olivier Galland, Forsker in PGP-Geo, will present his laboratory work  on the "Dynamics of volcanic plumbing systems and magma emplacement in the Earth's crust"

Time and place: Oct. 31, 2014 3:15 PM3:45 PM, PGP seminar room (FV414)

Alexander Bürger (Meteorological institute, Oslo, Norway) will present us his work done with his colleagues L. Andresen, G. Kielland, P-O. Kjensli, J-M. Lepioufle, Ø. Lie, O.E. Tveito and K. Ødemark.

Time and place: Oct. 29, 2014 1:05 PM, FØ467

Pat Scott , Imperial College London [slides]

Searches for particle physics beyond the Standard Model come in many forms, from searches for new particles at accelerators to gamma-ray and neutrino telescopes, cosmic ray detectors and ultra-clean experiments deep underground.  Efforts to combine multiple search channels in 'global fits' to new physics scenarios typically consider only a subset of the available channels, and apply them to a very small range of possible theories. Astroparticle searches in particular are usually only included in a very approximate way, if at all.  In this talk I will review recent progress in improving this situation, and preview some of the future developments and challenges in this field.

Time and place: Oct. 29, 2014 12:15 PM1:15 PM, PGP seminar room, V414

Guillaume Dumazer, postdoc in the Condensed Matter group, will present his theoretical and laboratory work on "2-phase granular transport in confined geometries"

Time and place: Oct. 22, 2014 1:05 PM, FØ467

Michael Kachelriess, NTNU [slides]

The IceCube Collaboration announced 2012 evidence for the first detection of extraterrestrial neutrinos. Meanwhile, the discovery of a extraterrestrial neutrino flux (of surprisingly large magnitude) has been established. After a review of the basic ideas of high-energy neutrino astrophysics, I discuss possible sources for these neutrinos and their signatures.  I  discuss the neutrino yield from collisions of cosmic ray nuclei with gas and the possibility that Galactic sources can explain the IceCube excess. I review also the cascade bound on extragalactic neutrinos and its consequences.

Time and place: Oct. 17, 2014 3:15 PM4:00 PM, PGP seminar room (FV414)

Unni Vik from the Centre for Ecological and Evolutionary Synthesis at the UiO will present us her work on bacteries and CO2.

Time and place: Oct. 15, 2014 1:05 PM, FØ467

Jörn Kersten, Universitetet i Bergen [slides]

Despite the astonishing success of the standard LambdaCDM cosmological scenario, there is mounting evidence for a tension with observations. For example, some measurements indicate that a part of the dark matter is hot. In addition, the observed properties of relatively small galaxies do not quite agree with the predictions by simulations of structure formation.

I will discuss a simple particle physics model containing cold dark matter (DM) and sterile neutrinos. Both are charged under a new gauge interaction. The resulting DM self-interactions and DM-neutrino interactions resolve the problems with structure formation. The sterile neutrinos can account for both a small hot DM component and the neutrino anomalies found in short-baseline experiments.

Time and place: Oct. 8, 2014 1:05 PM, FØ467

Anders Kvellestad, UiO

Recently a few small (but intriguing) deviations from Standard Model predictions have been identified in the LHC data, one being an excess in the dilepton spectrum in a CMS search for so-called 'kinematic edges' -- a classic signal of physics models with heavy particles decaying through sequential two-body decays. We present an interpretation of this excess in terms of a supersymmetric model with squarks undergoing such sequential decays down to the lightest neutralino, which is a viable candidate for particle dark matter. The good-fit parameter space of the model is presented, along with predictions for squark production at the upcoming 13 TeV LHC run.

Further, using the above analysis as an example, we briefly comment on the main challenges of confronting complex models like Supersymmetry with experimental results, and present an ongoing effort to overcome some of these challenges.

Time and place: Oct. 1, 2014 1:05 PM, FØ467

Marius L.  Meyer, UiO

In recent years there has been extensive interest in the study of strongly correlated states of cold atoms motivated by analogies with exotic states known from low-dimensional electronic systems, particularly quantum Hall states. In this talk I will present an analysis of the yrast states of two-component rotating Bose gases using Jain's composite fermion (CF) approach. A particularly simple subset of CF states are found to give very good approximations to the lowest energy states for low angular momenta.

Time: Oct. 1, 2014Oct. 3, 2014

Read more on the 7th SCOOP meeting web page

Time: Sep. 29, 2014Sep. 30, 2014

Read more on the meeting's web page