[seminar] [DANAS] 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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