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Author Pospelov, Maxim ♦ Ritz, Adam ♦ Skordis, Constantinos
Source arXiv.org
Content type Text
File Format PDF
Date of Submission 2008-08-05
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Astronomy & allied sciences ♦ Physics
Subject Keyword Astrophysics ♦ High Energy Physics - Phenomenology ♦ High Energy Physics - Theory ♦ physics:astro-ph ♦ physics:hep-ph ♦ physics:hep-th
Abstract We show that models of new particle physics containing massless pseudoscalar fields super-weakly coupled to photons can be very efficiently probed with CMB polarization anisotropies. The stochastic pseudoscalar fluctuations generated during inflation provide a mechanism for converting E-mode polarization to B-mode during photon propagation from the surface of last scattering. The efficiency of this conversion process is controlled by the dimensionless ratio H/(2\pi f_a), where H is the Hubble scale during inflation, and f_a^{-1} is the strength of the pseudoscalar coupling to photons. The current observational limits on the B-mode constrain this ratio to be less than 0.07, which in many models of inflation translates to a sensitivity to values of f_a in excess of 10^{14} GeV, surpassing the sensitivity of other tests.
Description Reference: Phys.Rev.Lett.103:051302,2009
Educational Use Research
Learning Resource Type Article
Page Count 4


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