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CMBPol Mission Concept Study: Probing Inflation with CMB Polarization

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arxiv 0811.3919 v2 pith:DV2TFQ65 submitted 2008-11-24 astro-ph gr-qchep-phhep-th

CMBPol Mission Concept Study: Probing Inflation with CMB Polarization

Daniel Baumann , Mark G. Jackson , Peter Adshead , Alexandre Amblard , Amjad Ashoorioon , Nicola Bartolo , Rachel Bean , Maria Beltran
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Francesco de Bernardis Simeon Bird Xingang Chen Daniel J. H. Chung Loris Colombo Asantha Cooray Paolo Creminelli Scott Dodelson Joanna Dunkley Cora Dvorkin Richard Easther Fabio Finelli Raphael Flauger Mark Hertzberg Katherine Jones-Smith Shamit Kachru Kenji Kadota Justin Khoury William H. Kinney Eiichiro Komatsu Lawrence M. Krauss Julien Lesgourgues Andrew Liddle Michele Liguori Eugene Lim Andrei Linde Sabino Matarrese Harsh Mathur Liam McAllister Alessandro Melchiorri Alberto Nicolis Luca Pagano Hiranya V. Peiris Marco Peloso Levon Pogosian Elena Pierpaoli Antonio Riotto Uros Seljak Leonardo Senatore Sarah Shandera Eva Silverstein Tristan Smith Pascal Vaudrevange Licia Verde Ben Wandelt David Wands Scott Watson Mark Wyman Amit Yadav Wessel Valkenburg Matias Zaldarriaga
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classification astro-ph gr-qchep-phhep-th
keywords inflationinflationarymeasurementspolarizationdetectionlimitphysicsprimordial
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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