Detecting higher spin fields through statistical anisotropy in the CMB and galaxy power spectra

Abstract

Primordial inflation may represent the most powerful collider to test high-energy physics models. In this paper we study the impact on the inflationary power spectrum of the comoving curvature perturbation in the specific model where massive higher spin fields are rendered effectively massless during a de Sitter epoch through suitable couplings to the inflaton field. In particular, we show that such fields with spin $s$ induce a distinctive statistical anisotropic signal on the power spectrum, in such a way that not only the usual $g_{2M}$-statistical anisotropy coefficients, but also higher-order ones (i.e., $g_{4M}$, $g_{6M}$, $\cdots$, $g_{(2s-2)M}$ and $g_{(2s)M}$) are nonvanishing. We examine their imprints in the cosmic microwave background and galaxy power spectra. Our Fisher matrix forecasts indicate that the detectability of $g_{LM}$ depends very weakly on $L$: all coefficients could be detected in near future if their magnitudes are bigger than about $10^{-3}$.

10 pages, 3 figures; version matching publication in PRD

References in corpus (17)

• Primordial Non-Gaussianities from Inflation Models
• Generation of Large-Scale Magnetic Fields in Single-Field Inflation
• Cosmological Collider Physics
• Non-Gaussianity as a Particle Detector
• The Nature of Primordial Fluctuations from Anisotropic Inflation
• Cosmic Microwave Background Statistics for a Direction-Dependent Primordial Power Spectrum
• Scalar-Scalar, Scalar-Tensor, and Tensor-Tensor Correlators from Anisotropic Inflation
• Asymmetric Beams and CMB Statistical Anisotropy
• On the Inflationary Perturbations of Massive Higher-Spin Fields
• Parity-violating and anisotropic correlations in pseudoscalar inflation
• Precise measurements of inflationary features with 21 cm observations
• Non-detection of a statistically anisotropic power spectrum in large-scale structure
• Polypolar spherical harmonic decomposition of galaxy correlators in redshift space: Toward testing cosmic rotational symmetry
• Possible Signatures of Inflationary Particle Content: Spin-2 Fields
• Statistical diagnostics to identify Galactic foregrounds in B-mode maps
• Angular dependence of primordial trispectra and CMB spectral distortions
• Revisiting constraints on (pseudo)conformal Universe with Planck data