New Constraints on Cosmic Polarization Rotation Including SPTpol B-Mode Polarization Observations

Pan, Wei-Ping; Alighieri, S. di Serego; Ni, Wei-Tou; Xu, Lixin

doi:10.1142/9789813203952_0046

Cited by 2 publications

(4 citation statements)

References 19 publications

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“…Reference [12] presents constraints on anisotropies of the cosmic birefringence using the TBTB trispectrum of WMAP7 data, while Refs. [25][26][27][28][29][30] used two-point correlation. The most stringent constraints prior to this paper were published by POLARBEAR [31].…”

Section: Introductionmentioning

confidence: 99%

BICEP2 / Keck Array IX: New bounds on anisotropies of CMB polarization rotation and implications for axionlike particles and primordial magnetic fields

Ade¹,

Ahmed²,

Aikin³

et al. 2017

Phys. Rev. D

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We present the strongest constraints to date on anisotropies of cosmic microwave background (CMB) polarization rotation derived from 150 GHz data taken by the BICEP2 & Keck Array CMB experiments up to and including the 2014 observing season (BK14). The definition of the polarization angle in BK14 maps has gone through self-calibration in which the overall angle is adjusted to minimize the observed TB and EB power spectra. After this procedure, the QU maps lose sensitivity to a uniform polarization rotation but are still sensitive to anisotropies of polarization rotation. This analysis places constraints on the anisotropies of polarization rotation, which could be generated by CMB photons interacting with axionlike pseudoscalar fields or Faraday rotation induced by primordial magnetic fields. The sensitivity of BK14 maps (∼3 μK-arc min) makes it possible to reconstruct anisotropies of the polarization rotation angle and measure their angular power spectrum much more precisely than previous attempts. Our data are found to be consistent with no polarization rotation anisotropies, improving the upper bound on the amplitude of the rotation angle spectrum by roughly an order of magnitude compared to the previous best constraints. * Corresponding author. toshiyan@stanford.edu PHYSICAL REVIEW D 96, 102003 (2017) 2470-0010=2017=96(10)=102003 (7) 102003-1 © 2017 American Physical SocietyOur results lead to an order of magnitude better constraint on the coupling constant of the Chern-Simons electromagnetic term g aγ ≤ 7.2 × 10 −2 =H I (95% confidence) than the constraint derived from the B-mode spectrum, where H I is the inflationary Hubble scale. This constraint leads to a limit on the decay constant of 10 −6 ≲ f a =M pl at mass range of 10 −33 ≤ m a ≤ 10 −28 eV for r ¼ 0.01, assuming g aγ ∼ α=ð2πf a Þ with α denoting the fine structure constant. The upper bound on the amplitude of the primordial magnetic fields is 30 nG (95% confidence) from the polarization rotation anisotropies.

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Section: Introductionmentioning

confidence: 99%

BICEP2 / Keck Array IX: New bounds on anisotropies of CMB polarization rotation and implications for axionlike particles and primordial magnetic fields

Ade¹,

Ahmed²,

Aikin³

et al. 2017

Phys. Rev. D

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“…See di Serego Alighieri [67] for a review and summary. For most recent results, see [24,[68][69][70]. The most recent analysis of Planck CMB polarization data gives <α> = 0.35 ± 0.05 ± 0.28 = 0.0061 ± 0.0009 ± 0.0049 [rad] with uniformity assessment of all-sky [69].…”

Section: Cosmic Amplification/attenuation and Cosmic Polarization Rotmentioning

confidence: 99%

“…The Maxwell equations (10a, b) or (1a-d) can be derived from this Lagrangian with the relation (12) and (6a,b). Using this χframework, we have demonstrated the construction of the light cone core metric from the experiments and observations as in Table 1 [22,23] with update of CPR fluctuation constraint to <(α − <α>) 2 > 1/2 < 0.02 from [24]. In the following sections, we summarize in more detail the construction of Table 1.…”

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On spacetime structure and electrodynamics

2016

Int. J. Mod. Phys. D

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Since almost all phenomena electrodynamics deal with have energy scales much lower than the Higgs mass energy and intermediate boson energy, electrodynamics of continuous media should be applicable and the constitutive relation of spacetime/vacuum should be local and linear. What is the key characteristic of the spacetime/vacuum? It is the Weak Equivalence Principle (WEP I) for photons/wave packets of light which states that the spacetime trajectory of light in a gravitational field depends only on its initial position and direction of propagation, and does not depend on its frequency (energy) and polarization, i.e. nonbirefringence of light propagation in spacetime/vacuum. With this principle it is proved by the author in 1981 in the weak field limit, and by Lammerzahl and Hehl in 2004 together with Favaro and Bergamin in 2011 without assuming the weak-field condition that the constitutive tensor must be of the core metric form with only two additional degrees of freedom - the pseudoscalar (Abelian axion or EM axion) degree of freedom and the scalar (dilaton) degree of freedom (i.e. metric with axion and dilaton). In this paper, we review this connection and the ultrahigh precision empirical tests of nonbirefringence together with present status of tests of cosmic Abelian axion and dilaton. If the stronger version of WEP is assumed, i.e. WEP II for photons (wave packets of light) which states in addition to WEP I also that the polarization state of the light would not change (e.g. no polarization rotation for linear polarized light) and no amplification/attenuation of light, then no Abelian (EM) axion and no dilaton, and we have a pure metric theory.Comment: 32 pages, 2 tables, review for the special issue on "Spacetime Structure and Electrodynamics" of International Journal of Modern Physics D, Vol. 25, No.14 (2016). arXiv admin note: substantial text overlap with arXiv:1512.0842

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New Constraints on Cosmic Polarization Rotation Including SPTpol B-Mode Polarization Observations

Cited by 2 publications

References 19 publications

BICEP2 / Keck Array IX: New bounds on anisotropies of CMB polarization rotation and implications for axionlike particles and primordial magnetic fields

BICEP2 / Keck Array IX: New bounds on anisotropies of CMB polarization rotation and implications for axionlike particles and primordial magnetic fields

On spacetime structure and electrodynamics

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