HIP NEWS June 8th 2015
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COSMO-Seminar
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Monday 8 June 2015 at 10:15 in A315
Alessandro Mirizzi (Bari University, Italy)
What Next on Axion-like Particles: Current Bounds and Discovery Opportunities
Abstract: Very light axion-like particles (ALPs) with a two-photon vertex are predicted in many extensions of the Standard Model of particle physics. Depending on the actual value of their mass, ALPs can play an important role in cosmology, being valuable dark matter candidates. The coupling with photons allows for ALP-photon mixing in external electromagnetic fields. This effect is exploited for direct searches of ALPs in laboratory experiments. The two-photon vertex would also induce the mixing with ALPs for photons emitted by distant astrophysical sources, and propagating in the large-scale cosmic magnetic fields. This mixing could produce signatures in astrophysical observations, ranging from the cosmic microwave background to the high-energy gamma-rays. In this talk I will present an overview of current bounds on ALPs and discovery opportunities in the planned laboratory and astrophysical experiments.
DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 9 June 2015 at 10.15 in A315
Harvey Meyer (Mainz)
Real-time phenomena in finite-temperature QCD
Abstract: I present two topics in finite-temperature QCD: one concerns the pion quasiparticle and its dispersion relation in the low-temperature phase; the second concerns non-static screening masses in the high-temperature phase, the corresponding perturbative predictions and the relation of these masses to transport properties and the dilepton rate.
COSMO-Seminar
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Wednesday 10 June 2015 at 14:15 in A315
Nelson Nunes (University of Lisbon)
TBA
DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Thursday 11 June 2015 at 10.15 in A315
Carlos Hoyos (Oviedo)
Ward identities and transport in 2+1 dimensions
Abstract: The Hall viscosity of chiral superfluids is determined by the angular momentum density. One can understand and generalize this relation using Ward identities of the energy-momentum tensor. Furthermore, the same identities connect viscosities and conductivities. A preliminary analysis in AdS/CFT reveals that the identities seem to be non-trivial in the sense that they cannot be derived simply from the asymptotic expansion of the solutions.
Unis svenska sommarfest
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https://flamma.helsinki.fi/fi/tiedotteet/unis-svenska-sommarfest
Visitors
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G. Bulmer 8.6. – 12.6. (KR,MH)
M. Hindmarsh 19.4. – 14.6. (KR)
C. Hoyos 8.6. – 12.6. (NJ,AV)
A. Mirizzi 8.6. (KE,SN)
N. Nunes 7.6. – 13.6. (KE,SN)