[seminar] Zvonimir Vlah, 12.01. (ponedjeljak) 14h (c.t.), Predavaona I krila IRB

[Kornelija Passek-Kumericki]

                       SEMINAR  TEORIJSKE  FIZIKE


   (Zajednički seminari Fizičkog odsjeka PMF-a te Zavoda za teorijsku
    fiziku i Zavoda za eksperimentalnu fiziku IRB-a)

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Biased Tracers in the Effective Field Theory of Large Scale
Structures



Zvonimr Vlah
SLAC and Stanford University


   Datum:  ponedjeljak, 12. siječnja 2015.
   Vrijeme: 14 sati c.t.
   Mjesto: IRB, predavaona I krila


Sazetak:

Understanding dark matter inhomogeneities and the corresponding tracers, 
like galaxies, on large cosmological scales can nowadays safely be 
considered as one of the pillars of the standard cosmological model. 
Detailed understanding of these inhomogeneities is crucial for interpretation
of observational data from numerous current and future surveys. 
Newly developed framework of Effective Field Theory of Large Scale 
Structures offers a consistent way of calculating the observables 
in the weakly non-linear regime. In this framework long wavelength 
fluctuations are described by integrating out the short distance modes 
and adding appropriate operators that take care of the effects that 
short distance fluctuations impose on long distances. We use this
framework to focus on the description of collapsed objects and biased 
tracers of dark matter. The overdensity of these objects at a certain 
position and given time is determined by the initial tidal tensor, 
velocity gradients and spatial derivatives of the regions of dark matter 
that, throughout the evolution of the universe, ended up at that 
given location. We present the results for the galaxy observables, 
i.e. their-two and three-point autocorrelation functions, at one-loop and
three-level respectively.

Voditeljica seminara: Kornelija Passek-Kumericki (passek at irb dot hr)
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