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Probing Inflation with CMB Polarization

2009; American Institute of Physics; Linguagem: Inglês

10.1063/1.3160885

1935-0465

Daniel Baumann, Mark Jackson, Peter Adshead, Alexandre Amblard, Amjad Ashoorioon, Nicola Bartolo, Rachel Bean, M. T. Beltrán, Francesco de Bernardis, Simeon Bird, Xingang Chen, Daniel J. H. Chung, L. P. L. Colombo, Asantha Cooray, Paolo Creminelli, Scott Dodelson, Joanna Dunkley, Cora Dvorkin, Richard Easther, F. Finelli⋆, Raphael Flauger, Mark P. Hertzberg, Katherine Jones-Smith, Shamit Kachru, Kenji Kadota, Justin Khoury, William H. Kinney, Eiichiro Komatsu, Lawrence M. Krauss, Julien Lesgourgues, Andrew R. Liddle, M. Liguori, Eugene A. Lim, Andrei Linde, S. Matarrese, Harsh Mathur, Liam McAllister, A. Melchiorri, Alberto Nicolis, L. Pagano, Hiranya V. Peiris, Marco Peloso, Levon Pogosian, E. Pierpaoli, Antonio Riotto, U. Seljak, Leonardo Senatore, Sarah Shandera, Eva Silverstein, Tristan L. Smith, Pascal M. Vaudrevange, Licia Verde, B. D. Wandelt, David Wands, Scott Watson, Mark Wyman, Amit Yadav, Wessel Valkenburg, Matías Zaldarriaga, Scott Dodelson, Daniel Baumann, Asantha Cooray, Joanna Dunkley, Aurélien A. Fraisse, Mark Jackson, A. Kogut, Lawrence M. Krauss, Matías Zaldarriaga, Kendrick Smith,

Stochastic processes and financial applications

We summarize the utility of precise cosmic microwave background (CMB) polarization measurements as probes of the physics of inflation. We focus on the prospects for using CMB measurements to differentiate various inflationary mechanisms. In particular, a detection of primordial B‐mode polarization would demonstrate that inflation occurred at a very high energy scale, and that the inflaton traversed a super‐Planckian distance in field space. We explain how such a detection or constraint would illuminate aspects of physics at the Planck scale. Moreover, CMB measurements can constrain the scale‐dependence and non‐Gaussianity of the primordial fluctuations and limit the possibility of a significant isocurvature contribution. Each such limit provides crucial information on the underlying inflationary dynamics. Finally, we quantify these considerations by presenting forecasts for the sensitivities of a future satellite experiment to the inflationary parameters.