HIP NEWS September 1st 2014

HIP NEWS September 1st 2014
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DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 2 September 2014 at 10.15 in A315
Gero von Gersdorff (Sao Paulo)
New Physics Effects in Anomalous Gauge Boson Vertices

Abstract: TBA

September call 2014 / Academy’s Ask & Apply info
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Please check for more detailed programme and registration:
https://flamma.helsinki.fi/fi/suomenakatemia

Finnish Academy of Science and Letters
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Väisälä Foundation fellowships open for application during 15.8.-26.9.2014, see www.acadsci.fi.

Tekes: Calls for proposals in 2014
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Tekes, the Finnish technology funding agency, has several calls for research funding and workshops for information and networking in fall 2014. Some of the headlines are in Finnish only.
Please ask more information from Maarit Haataja. You can also find additional information on Flamma pages.
https://flamma.helsinki.fi/portal/units/farmasia?_nfpb=true&_pageLabel=P12000359611379669328883&contentId=HY323628&placeId=HY300372

Finnish for foreigners: registration for autumn 2014 courses has begun
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https://flamma.helsinki.fi/portal/home/sisalto?_nfpb=true&_windowLabel=contentviewer&contentId=HY321951&lang=en&_pageLabel=content_view

Visitors
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F. Hehl 18.8. – 12.9. (AT)
G. von Gersdorff 30.8. – 4.9. (AV)

HIP NEWS August 25th 2014

HIP NEWS August 25th 2014
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DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 26 August 2014 at 10.15 in A315
Mikko Laine (Bern)
Towards first principles in particle cosmology

Abstract: Some of the important issues in particle cosmology (such as the existence of a matter-antimatter asymmetry) can be faithfully addressed in terms of interactions probed at terrestrial experiments, only if we know how to compute reliably with relativistic thermal quantum field theories. After outlining a few of the conceptual and technical challenges involved, I illustrate the status of the field with the example of the right-handed neutrino production rate in a very early universe. The role that this quantity plays in practical matter-antimatter asymmetry computations is briefly sketched.

September call 2014 / Academy’s Ask & Apply info
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Please check for more detailed programme and registration:
https://flamma.helsinki.fi/fi/suomenakatemia

Finnish Academy of Science and Letters
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Väisälä Foundation fellowships open for application during 15.8.-26.9.2014, see www.acadsci.fi.

Tekes: Calls for proposals in 2014
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https://flamma.helsinki.fi/portal/units/farmasia?_nfpb=true&_pageLabel=P12000359611379669328883&contentId=HY323628&placeId=HY300372

Finnish for foreigners: registration for autumn 2014 courses has begun
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https://flamma.helsinki.fi/portal/home/sisalto?_nfpb=true&_windowLabel=contentviewer&contentId=HY321951&lang=en&_pageLabel=content_view

Visitors
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F. Hehl 18.8. – 12.9. (AT)
G. von Gersdorff 30.8. – 4.9. (AV)

HIP NEWS August 18th 2014

HIP NEWS August 18th 2014
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Finnish Academy of Science and Letters
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Väisälä Foundation fellowships open for application during 15.8.-26.9.2014, see www.acadsci.fi.

DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 19 August 2014 at 10.15 in A315
Tommi Markkanen (Helsinki)
Spacetime curvature and the Higgs stability during inflation

Abstract: It is currently widely accepted that for a high scale of inflation the EW Higgs vacuum is unstable due to large fluctuations of order H. However, this conclusion is reached by neglecting potentially significant effects induced by the spacetime curvature. In this talk I review the derivation of a one-loop SM Higgs effective potential in curved space and discuss its implications. In particular I will show that generally a large curvature mass is generated which can stabilize the potential against fluctuations induced by inflation.

Tekes: Calls for proposals in 2014
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Tekes, the Finnish technology funding agency, has several calls for research funding and workshops for information and networking in fall 2014. Some of the headlines are in Finnish only.
Please ask more information from Maarit Haataja. You can also find additional information on Flamma pages.
https://flamma.helsinki.fi/portal/units/farmasia?_nfpb=true&_pageLabel=P12000359611379669328883&contentId=HY323628&placeId=HY300372

Finnish for foreigners: registration for autumn 2014 courses has begun
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Register in advance by 11 August.
https://flamma.helsinki.fi/portal/home/sisalto?_nfpb=true&_windowLabel=contentviewer&contentId=HY321951&lang=en&_pageLabel=content_view

Visitors
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F. Hehl 18.8. – 12.9. (AT)
G. von Gersdorff 30.8. – 4.9. (AV)
T. Koivisto 18.8. – 22.8. (KR, KE)
Y. Tada 19.8. – 22.8. (KE)

HIP NEWS August 11th 2014

HIP NEWS August 11th 2014
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DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Thursday 14 August 2014 at 10.15 in A315
Timo Alho (Jyväskylä)
Thermodynamics of holographic models for QCD in the Veneziano limit

Abstract: We have studied the thermodynamics of a class of holographic bottom-up models for QCD in the limit where both Nc and Nf go to infinity such that their ratio is finite. These Veneziano QCD -models incorporate a gravity-dilaton system to model the glue dynamics and a scalar tachyon for the fermion degrees of freedom. We have solved the system with full backreaction at finite temperature and finite chemical potential, allowing a determination of the chiral and deconfining transitions. I will also discuss ongoing work in modeling the low-temperature hadron gas phase.

Thursday 14 August 2014 at 14.15 in A315
Matthias Ihl (Porto)
Holographic Bilayer/Monolayer Phase Transitions

Abstract: In the present talk, I will discuss the phase structure of bilayer and monolayer phases in the (2+1)-dimensional defect field theory whose gravity dual is obtained by embedding D5/anti-D5 probe flavour branes in the singular conifold. We study in detail the embedding equations and compare the free energies of the resulting
configurations at non-zero temperature and external magnetic field perpendicular to the defects. Moreover, we analyse the meson spectrum and confirm the stability of the single bilayer solution.

Tekes: Calls for proposals in 2014
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Tekes, the Finnish technology funding agency, has several calls for research funding and workshops for information and networking in fall 2014. Some of the headlines are in Finnish only.
Please ask more information from Maarit Haataja. You can also find additional information on Flamma pages.
https://flamma.helsinki.fi/portal/units/farmasia?_nfpb=true&_pageLabel=P12000359611379669328883&contentId=HY323628&placeId=HY300372

Finnish for foreigners: registration for autumn 2014 courses has begun
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Register in advance by 11 August.
https://flamma.helsinki.fi/portal/home/sisalto?_nfpb=true&_windowLabel=contentviewer&contentId=HY321951&lang=en&_pageLabel=content_view

Visitors
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D. Bödeker 13.8. – 16.8. (KR)
G. von Gersdorff 30.8. – 4.9. (AV)
Y. Tada 19.8. – 24.8. (KE)
A. Tranberg 14.8. – 16.8. (KR)

HIP NEWS August 4th 2014

HIP NEWS August 4th 2014
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Tekes: Calls for proposals in 2014
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https://flamma.helsinki.fi/portal/units/farmasia?_nfpb=true&_pageLabel=P12000359611379669328883&contentId=HY323628&placeId=HY300372

Finnish for foreigners: registration for autumn 2014 courses has begun
————————————————————————-
Register in advance by 11 August.
https://flamma.helsinki.fi/portal/home/sisalto?_nfpb=true&_windowLabel=contentviewer&contentId=HY321951&lang=en&_pageLabel=content_view

Visitors
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D. Bödeker 13.8. – 16.8. (KR)
G. von Gersdorff 30.8. – 4.9. (AV)
Y. Tada 19.8. – 24.8. (KE)

HIP NEWS June 23rd 2014

HIP NEWS June 23rd 2014
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Finnish for foreigners: registration for autumn 2014 courses has begun
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https://flamma.helsinki.fi/portal/home/sisalto?_nfpb=true&_windowLabel=contentviewer&contentId=HY321951&lang=en&_pageLabel=content_view

Visitors
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J.S. Kim 24.6. – 28.6. (OL)

HIP NEWS June 9th 2014

HIP NEWS June 9th 2014
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DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Monday 9 June 2014 at 14.15 in A315
Ioan Ghisoiu (Bern)
Three-loop Debye mass and effective coupling in thermal QCD

Abstract: QCD at finite temperature is afflicted with infrared divergences that can be cured in part in the framework of a dimensionally reduced effective theory, Electrostatic QCD. We determine the three-loop effective parameters of this theory as matching coefficients to full QCD.

Tuesday 10 June 2014 at 10.15 in A315
Aleksi Kurkela (CERN)
Bottom-up thermalization in heavy-ion collisions

Abstract: It is a commonly held belief that weak coupling dynamics are in contradiction with the apparently fast thermalization observed in heavy-ion collisions at RHIC and at the LHC. This belief is based on solely parametric estimates and naturalness arguments in the “Bottom-up?? picture of thermalization of Baier, Mueller, Schiff, and Son. In my talk, I will discuss elevating this parametric picture into a numerical one through simulations in an effective kinetic theory. I discus how the numerical factors play an important role and show that the Bottom-Up scenario results in rapid thermalization at realistic couplings.

COSMO-Seminar
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Wednesday 11 June 2014 at 14:15 in A315
Matti Herranen (NBI,Copenhagen)
Nonequilibrium QFT approach to leptogenesis

The observed baryon asymmetry of the Universe may have been produced dynamically in the very early Universe by a baryogenesis process. Baryogenesis via leptogenesis is among the most prominent candidates for a successfull baryogenesis scenario. For reliable calculations of the baryon asymmetry first principle methods of nonequilibrium quantum field theory are required. We construct a transport theory of leptogenesis based on the Schwinger-Keldysh or Closed Time Path (CTP) formalism of nonequilibrium QFT. The resulting kinetic equations incorporate finite density medium effects and quantum coherence effects and therefore provide a generalization to standard (quantum) Boltzmann equations. We find that the finite density corrections from loop integrals typically lead to an enhancement of the asymmetry. In the resonant regime with nearly degenerate right-handed neutrino masses, our results confirm the general structure of the resonant enhancement of CP-violation, however, novel terms related to flavour oscillations can be important in the dynamics.

Visitors
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I. Ghisoiu 7.6. – 11.6. (AV)
M. Herranen 9.6. – 11.6. (SR)
M. Hindmarsh 22.4. – 15.6. (KR)
A. Kurkela 9.6. – 12.6. (KR)
R. Malik 12.6. – 18.6. (AT)

HIP NEWS June 2nd 2014

HIP NEWS June 2nd 2014
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HIP STAFF NEWS
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The HIP QCD-theory project leader Tuomas Lappi was awarded the 2014 Zimányi Medal for his pioneering independent and collaborative work on Color Glass Condensate and the Glasma models of initial conditions in high energy A+A reactions that provide theoretical foundations on which many current bulk viscous hydrodynamic and jet quenching opacity calculations depend. Tuomas received the medal and 2000 USD prize on 24 May at the nearly-900-participant Quark Matter 2014 -conference in Darmstadt. This medal is the most prestigious young-scientist (below 40) award in this field.

DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 3 June 2014 at 10.15 in A315
Matti Järvinen (Heraklion)
New results from holographic V-QCD

Abstract: I discuss latest developments in holographic bottom-up models for QCD in the Veneziano limit (V-QCD) at finite quark mass. Masses, the S-parameter, and condensates have expected mass dependence for all values of x=Nf/Nc, and the axial anomaly of QCD is correctly implemented by a string-motivated CP-odd sector of the V-QCD action. Consequently, the pion and eta prime masses satisfy the Gell-Mann-Oakes-Renner and Witten-Veneziano relations. I also discuss how double trace deformations can be studied.

Thursday 5 June 2014 at 10.15 in A315
Santosh Kumar Rai (Allahabad)
Some Higgs studies after the “Higgs” discovery

Abstract: After giving a flavour of some basic extensions of the Higgs sector beyond the Standard Model, I will discuss two different Higgs physics scnenarios where the extensions to the Higgs sector are inherently chromophobic by construction and their implications in the context of LHC studies.

Friday 6 June 2014 at 10.15 in A315
Charles Bennett (Baltimore, Principal Investigator, WMAP)
Cosmology and the Cosmic Microwave Background

Abstract: Studies of the Cosmic Microwave Background (CMB) have led to major advances in cosmology. In this talk I will summarize recent CMB results and their implications for cosmology. I will compare and contrast select WMAP and Planck cosmological results. I will also discuss other some cosmological measurements, both past and future, that do not involve the CMB. I will focus on how these measurements help to test cosmological models and narrow the range off their associated parameters. Specific topics will include constraints on the Hubble constant and inflation models.

Staff Training 2014 (2015)
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For new employees
For researchers and doctoral candidates
https://flamma.helsinki.fi/portal/home/sisalto?_nfpb=true&_pageLabel=content_view&contentId=HY320180&placeId=HY056472
Registration on Henkka: www.helsinki.fi/trainingcalendar

Visitors
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C. Bennett 6.6. (H.K-S)
D. Figueroa 30.5. – 2.6. (KE)
M. Hindmarsh 22.4. – 15.6. (KR)
T. Koivisto 21.5. – 4.6. (KE)
A. Rajantie 2.6. (KE)

HIP NEWS May 26th 2014

HIP NEWS May 26th 2014
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ENQFEST – 30 YEARS OF COSMOLOGY
May 30-31, 2014
University of Helsinki, Physicum, auditorium E204.
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An international workshop to celebrate the occasion of Professor Kari Enqvist’s 60th birthday. The topics of the workshop include cosmological inflation, curvaton models, inhomogeneities and alternative theories of gravitation.

For a detailed program and schedule consult the conference web page
http://theory.physics.helsinki.fi/~Enqfest/

Seminar: How to utilize new CSC computing resources in your research
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Monday, 26.05.2014, at 10 a.m.

Room Kvantti (Physicum C208), Kumpula campus, University of Helsinki, Gustaf Hällströmin katu 2a, Helsinki.

The 2nd phase of the CSC’s supercomputer (Sisu) and supercluster
(Taito) expected to be available for the researchers in Summer/Autumn
2014, are opening new possibilities for Finnish researchers – they will
increase the available computing capacity 5-fold.

Moreover, the activities of CSC have expanded during the last few years
from supercomputing to several new fields, like data management and cloud computing.

The CSC resources and services available to researchers will be presented, so that they can benefit from them from day 1. CSC will also collect feedback for configuring the systems according to the researchers’ needs.

Seminar program and Registration:
http://www.csc.fi/csc/kurssit/arkisto/gut14_Hy_Gen
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DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 27 May 2014 at 10.15 in A315
Jacek Dobaczewski (Fidipro professor, Jyväskylä)
Nuclear density functional theory

Abstract:
In the condensed-matter, atomic, and molecular physics, density functional theory (DFT) is a universal approach to compute ground state and excited configurations of many-electron systems. At present, the DFT strategy is also intensely studied and applied in the area of nuclear structure. The nuclear energy density functional (EDF) – a natural extension of the self-consistent mean-field theory – is a tool of choice for computations of ground-state properties and low-lying excitations of medium-mass and heavy nuclei. Over the past thirty-odd years, a lot of experience was accumulated in implementing, adjusting, and using the EDF methods in nuclei, and this research direction is still actively pursued. In particular, current developments concentrate on (i) attempts to improve the performance and precision delivered by the nuclear EDF methods, (ii) derivations of density functionals from first principles rooted in the low-energy chromodynamics and effective theories, and (iii) including effects of low-energy correlations and symmetry restoration. The seminar will give an overview of foundations and recent achievements gained within the nuclear EDF methods.

Wednesday 28 May 2014 at 10.15 in A315
Mariana Frank (Montreal)
Charginos and neutralinos beyond MSSM

Abstract: After the discovery of the Higgs Boson, the LHC is poised to reopen, operating at centre of mass energy of 13 TeV, and to look for signals of physics beyond the Standard Model. Supersymmetry remains the favourite scenario, and if valid, it is likely to manifest itself in observations of signals coming from the production and decays of charginos and neutralinos. I analyse these in two models beyond the minimal scenario, one with extra higgsinos (fermionic partners of Higgs bosons), and one with extra gauginos (fermionic partners of gauge bosons), and show that the production is likely to be enhanced, and the decay modes altered. Investigating the final signal (into one, two, and three or more leptons) is likely to yield distinguishing signals for the models and offer indications of the extended gauge structure.

COSMO-Seminar
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May 28 (Wed), 14:15 in A315
Federico Urban (Bruxelles)
Bubble observers in Bubbland

Inflation typically produces exponentially too many bubbles.
Having access to only one Hubble horizon, we (may) experience a bias
in cosmological observations, because modes whose wavelengths are
beyond our causal horizon today can have a distinct, quantitative as
well as structural, effect on observables. Nonetheless, despite our
local patch being only a limited sample of Bubbland, we are still
able to infer definite statistical predictions from within our
Hubble Bubble.

Sommarfest för personal och doktorander 11.6.2014
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Anmälan till Unis svenska sommarfest har öppnats!
Hjärtligt välkommen – sydämellisesti tervetuloa, önskar Unis enhet för svenska ärenden!
https://flamma.helsinki.fi/portal/home/sisalto?_nfpb=true&_pageLabel=content_view&contentId=HY320052&placeId=HY034203

Visitors
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C. Bennett 6.6. (H.K-S)
M. Frank 18.5. – 31.5. (KH)
M. Hindmarsh 22.4. – 15.6. (KR)
T. Koivisto 21.5. – 4.6. (KE)
B. Mukhopadhyaya 14.5. – 29.5. (KH)
S.K. Rai 28.5. – 19.6. (KH)
O. Taanila 26.5. – 30.5. (AV)
F. Urban 28.5. – 30.5. (SN)