HIP NEWS October 28th 2013
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DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 29 October 2013 at 10.15 in A315
Kimmo Tuominen (Helsinki)
Beyond the Standard Model

Abstract: The existence of the Higgs mechanism and the associated scalar particle has been firmly established by LHC experiments. While the Standard Model (SM) of elementary particle interactions provides an excellent parametrisation of LHC data, the need for physics beyond SM remains as serious as ever: for example the origin of the weak scale and fermion masses, the dark matter abundance and the matter-antimatter asymmetry remain unexplained. Aspects of these issues are discussed in this talk with concrete and testable model examples.

Thursday 31 October 2013 at 10.15 in A315
Chris Kouvaris (CP3, Odense)
The dark side of Stars

Abstract: I will talk about how compact stars such as white dwarfs and neutron stars can impose constraints on properties of dark matter models. Dark matter accumulation into neutron stars can change the thermal evolution of the star due to dark matter annihilation taking place inside the star. In the case of asymmetric dark matter, WIMP accumulation might lead under certain conditions to the formation of a black hole that can potentially destroy the star, thus imposing constraints on several models of dark matter.

COSMO-Seminar
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Oct 30 (Wed), 14:15 in A315
Alexey Golovnev (Saint-Petersburg)
ADM analysis of massive and bimetric gravity models and the problem of ghosts.

Abstract: We review the ADM analysis of massive gravity and bigravity models, with emphasis on avoidance of Boulware-Deser-ghost-like excitations. The models of dRGT type and a version of bimetric variational principle are discussed in detail. Multimetric models and vielbein formalism are also mentioned.

Fall 2013 PhD school, “Supersymmetry or not, what is the evidence?”
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A particle/astro PhD school, Copenhagen
on supersymmetry, October 28-November 1st

https://indico.nbi.ku.dk/conferenceDisplay.py?confId=590

VISITORS
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A. Golovnev 24.10. – 6.11. (KE)
M. Hindmarsh 30.10.-1.11. (KR)
S. Huber 30.10.-1.11. (KR)
S. Niyogi 15.9.-15.12 (KH)

HIP NEWS October 21st 2013
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HIP PERSONNEL LIST UPDATE
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Please check the information on the Personnel list in HIP web pages.

DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 22 October 2013 at 10.15 in A315
Tomas Brauner (Helsinki)
Spontaneous symmetry breaking and Nambu-Goldstone bosons: some news in the old story

Abstract: The concept of spontaneous symmetry breaking is key to understanding of a vast range of physical phenomena such as superfluidity, ferromagnetism, or the origin of masses of elementary particles. I will provide a brief introduction to this classic topic and then review some recent results: (i) Completed classification and counting of Nambu-Goldstone bosons; (ii) A new class of states protected by symmetry: the massive Nambu-Goldstone bosons. I will conclude by outlining some yet unresolved problems, relevant for applications to a variety of quantum many-body systems.

Fall 2013 PhD school, “Supersymmetry or not, what is the evidence?”
——————————————————————–
A particle/astro PhD school, Copenhagen
on supersymmetry, October 28-November 1st

https://indico.nbi.ku.dk/conferenceDisplay.py?confId=590

VISITORS
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A. Golovnev 24.10. – 6.11. (KE)
L. Laperashvili 1.10. – 22.10. (AT)
S. Niyogi 15.9.-15.12 (KH)

HIP NEWS October 14th 2013
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The workplace wellbeing survey 1.10. – 15.10.2013
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The workplace wellbeing survey for universities is part of a cooperation agreement with Varma Mutual Pension Insurance Company that includes all Finnish universities.

The workplace wellbeing survey will be accessible Tuesday to Tuesday, 1-15 October 2013.

The survey can be taken at
https://my.surveypal.com/yliopistojen_tyohyvinvointikysely_2013_-_Helsingin_yliopisto

DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 15 October 2013 at 10.15 in A315
Holger Bech Nielsen (Niels Bohr Institute)
What is so special about the Standard Model? Small representations.

Now it seems that the Standard Model gets more and more supported without yet convincing signs of new physics, so one may with increased strength ask: Why is just the a priori not so obvious Standard Model being selected by Nature? Don Bennett and I started by asking for a quantity depending on the gauge gruop which would be maximal on the Standard Model Group. We found a quantity which is essentially the ratio of the quadratic Casimir for the adjoint representation relative to the quadratic Casimir for the “smallest” faithful representation. Essentially the same maximization principle seems also to deliver the space-time dimension and the representation for the Higgs field. Taking into account the requirements of no anomalies, it is also very close at least to tell what Weyl field representations one shall find. So approximately the whole Standard Model except the number of families come out from such a really “small representation” principle!

Fall 2013 PhD school, “Supersymmetry or not, what is the evidence?”
——————————————————————–
A particle/astro PhD school, Copenhagen
on supersymmetry, October 28-November 1st

https://indico.nbi.ku.dk/conferenceDisplay.py?confId=590

VISITORS
———
A. Golovnev 24.10. – 6.11. (KE)
L. Laperashvili 1.10. – 22.10. (AT)
H.B. Nielsen 14.10. – 18.10. (AT)
S. Niyogi 15.9.-15.12 (KH)

HIP NEWS October 7th 2013
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FAIR – NUSTAR (NUclear STructure, Astrophysics and Reactions) Collaboration Week will take place at the Kumpula Campus of the University of Helsinki during the week of 7-11. 10. 2013. The aim of the NUSTAR Week is to provide the possibility for collaboration and working group meetings of all NUSTAR projects and in particular to discuss technical results and perspectives together. Physics highlights obtained with already available instrumentation will be presented. In addition, there will be a Technical Board meeting, a Resource Board meeting, as well as a Collaboration Committee meeting during the week. For more details, see HIP website.

DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Friday 11 October 2013 at 10.15 in A315 (Note day!)
Aleksi Kurkela (CERN)
Photon production in quark-gluon plasma

Abstract: TBA

Fall 2013 PhD school, “Supersymmetry or not, what is the evidence?”
——————————————————————–
A particle/astro PhD school, Copenhagen
on supersymmetry, October 28-November 1st

https://indico.nbi.ku.dk/conferenceDisplay.py?confId=590

VISITORS
———
G. Bhattacharyya 9.9. – 9.10. (KH)
A. Golovnev 24.10. – 6.11. (KE)
L. Laperashvili 1.10. – 22.10. (AT)
S. Niyogi 15.9.-15.12 (KH)