Modeling The Large Scale Bias of Neutral Hydrogen (2009)
Marin, Felipe, Gnedin, Nickolay Y., Seo, Hee-Jong, Vallinotto, Alberto
We present analytical estimates of the large scale bias of neutral Hydrogen (HI) based on the Halo Occupation Distribution formalism. We use a simple, non-parametric model which monotonically relates...
A ground-based 21cm Baryon acoustic oscillation survey (2009)
Seo, Hee-Jong, Dodelson, Scott, Marriner, John, Mcginnis, Dave, Stebbins, Albert, Stoughton, Chris, ...
Baryon acoustic oscillations (BAO) provide a robust standard ruler with which to measure the acceleration of the Universe. The BAO feature has so far been detected in optical galaxy surveys....
Vallinotto, Alberto, Viel, Matteo, Das, Sudeep, Spergel, David N.
We expect a detectable correlation between two seemingly unrelated quantities: the four point function of the cosmic microwave background (CMB) and the amplitude of flux decrements in quasar (QSO)...
The WIMP Forest: Indirect Detection of a Chiral Square (2009)
Bertone, Gianfranco, Jackson, C. B., Shaughnessy, Gabe, Tait, Tim M. P., Vallinotto, Alberto
The spectrum of photons arising from WIMP annihilation carries a detailed imprint of the structure of the dark sector. In particular, loop-level annihilations into a photon and another boson can in...
Lenses in the forest: cross-correlation of the Lyman-alpha flux with CMB lensing (2009)
Vallinotto, Alberto, Das, Sudeep, Spergel, David N., Viel, Matteo
We present a theoretical estimate for a new observable: the cross-correlation between the Lyman-alpha flux fluctuations in quasar (QSO) spectra and the convergence of the cosmic microwave background...
21 cm Intensity Mapping (2009)
Peterson, Jeffrey B., Aleksan, Roy, Ansari, Reza, Bandura, Kevin, Bond, Dick, Bunton, John, ...
Using the 21 cm line, observed all-sky and across the redshift range from 0 to 5, the large scale structure of the Universe can be mapped in three dimensions. This can be accomplished by studying...
Universal Weak Lensing Distortion of Cosmological Correlation Functions (2008)
Dodelson, Scott, Schmidt, Fabian, Vallinotto, Alberto
Gravitational lensing affects observed cosmological correlation functions because observed images do not coincide with true source locations. We treat this universal effect in a general way here,...
Weak Lensing Effects on the Galaxy Three-Point Correlation Function (2008)
Schmidt, Fabian, Vallinotto, Alberto, Sefusatti, Emiliano, Dodelson, Scott
We study the corrections to the galaxy three-point correlation function (3PCF) induced by weak lensing magnification due to the matter distribution along the line of sight. We consistently derive all...
Neutralino Dark Matter and Trilepton Searches in the MSSM (2008)
Hooper, Dan, Plehn, Tilman, Vallinotto, Alberto
Searches for supersymmetry are among the most exciting physics goals at Run II of the Tevatron. In particular, in supersymmetric models with light charginos, neutralinos and sleptons, associated...
Weak Lensing of Baryon Acoustic Oscillations (2007)
Vallinotto, Alberto, Dodelson, Scott, Schimd, Carlo, Uzan, Jean-Philippe
Baryon Acoustic Oscillations (BAO) have recently been observed in the distribution of distant galaxies. The height and location of the BAO peak are strong discriminators of cosmological parameters....
Carena, Marcela, Hooper, Dan, Vallinotto, Alberto
In this article, we explore the interplay between searches for supersymmetric particles and Higgs bosons at hadron colliders (the Tevatron and the LHC) and direct dark matter searches (such as CDMS,...
Curvature perturbations in the early universe : theoretical models and observational tests / (2006)
Thesis (Ph. D.)--University of Chicago, Dept. of Physics, June 2006.
Non-Gaussianity from Broken Symmetries (2005)
Kolb, Edward W., Riotto, Antonio, Vallinotto, Alberto
Recently we studied inflation models in which the inflaton potential is characterized by an underlying approximate global symmetry. In the first work we pointed out that in such a model curvature...
Learning from the Scatter in Type Ia Supernovae (2005)
Dodelson, Scott, Vallinotto, Alberto
Type Ia Supernovae are standard candles so their mean apparent magnitude has been exploited to learn about the redshift-distance relationship. Besides intrinsic scatter in this standard candle,...
Curvature Perturbations from Broken Symmetries (2004)
Kolb, Edward W., Riotto, Antonio, Vallinotto, Alberto
We present a new general mechanism to generate curvature perturbations after the end of the slow-roll phase of inflation. Our model is based on the simple assumption that the potential driving...
Inflationary potentials yielding constant scalar perturbation spectral indices (2003)
Vallinotto, Alberto, Copeland, Edmund J., Kolb, Edward W., Liddle, Andrew R., Steer, Daniele A.
We explore the types of slow-roll inflationary potentials that result in scalar perturbations with a constant spectral index, i.e., perturbations that may be described by a single power-law spectrum...