Lensinglike tensions in the 
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 legacy release

Motloch, Pavel; Hu, Wayne

doi:10.1103/physrevd.101.083515

Cited by 38 publications

(29 citation statements)

References 54 publications

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“…On the other hand, the case where A TTTEEE L = 1 is about 3σ away from the ΛCDM best-fit. It thus seems that the extra smoothing of the TT-TE-EE peaks cannot be attributed to actual gravitational lensing [75,77,78]. Furthermore, once marginalizing over the lensing information in Planck data, the resulting temperature and polarization power spectra favor a cosmology with a lower A s and ω cdm ≡ Ω cdm h 2 .…”

Section: Introductionmentioning

confidence: 99%

Pseudoscalar sterile neutrino self-interactions in light of Planck, SPT and ACT data

Corona,

Murgia,

Cadeddu

et al. 2021

Preprint

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We reassess the viability of a cosmological model including a fourth additional sterile neutrino species that self-interacts through a new pseudoscalar degree of freedom. To that end, we perform a series of extensive analyses fitting various combinations of cosmic microwave background (CMB) data from Planck, the Atacama Cosmology Telescope (ACT) and the South Pole Telescope (SPT), both alone and in combination with Baryon Acoustic Oscillation (BAO) and Supernova Ia (SnIa) observations. We show that the scenario under study, although capable to resolve the Hubble tension without worsening the so-called S 8 tension about the growth of structures, is severely constrained by high-multipole polarization data from both Planck and SPT. Intriguingly, when trading Planck TE-EE data for those from ACT, we find a 3σ preference for a non-zero sterile neutrino mass, m s = 3.6 +1.1 −0.6 eV (68% C.L.), compatible with the range suggested by longstanding short-baseline (SBL) anomalies in neutrino oscillation experiments. The preference is mostly driven by ACT favouring a higher value for the primordial spectral index n s with respect to Planck and SPT. The pseudoscalar model appears indeed to provide a better fit to ACT data with respect to ΛCDM (∆χ 2 −5). In particular, we show that the mild tension between Planck and ACT is due to the different pattern in the TE and EE power spectra on multipoles between 350 1000. We also check the impact of marginalizing over the gravitational lensing information in Planck data, showing that the model does not solve the CMB lensing anomaly. Future work including higher precision data from current and upcoming CMB ground-based experiments will be crucial to test these results. Contents 1 Introduction 1 2 The pseudoscalar sterile neutrino self-interaction model 4 3 Methods and data 4 4 Results 5 4.1 Planck + A TTTEEE L + A φφ L 6 4.2 Planck TT + SPT 8 4.3 Planck TT + ACT 9 4.4 Best-fit cosmology and its impact on the CMB 10 5 Planck vs ACT: a deeper look 13 6 Comparison with SBL neutrino oscillation experiments 16 7 Conclusions 18 A Best-fit parameter values and χ 2 per experiment 20 B Additional triangle plots 22 C Impact on the linear matter power spectrum 22 Pseudoscalar model Parameter ACT +BAO+SnIa Planck +ACT +BAO+SnIa 100 ω b 2.185 +0.

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Section: Introductionmentioning

confidence: 99%

Pseudoscalar sterile neutrino self-interactions in light of Planck, SPT and ACT data

Corona,

Murgia,

Cadeddu

et al. 2021

Preprint

View full text Add to dashboard Cite

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“…A plausible explanation for such lensing anomaly is an oscillatory modulation in the primordial power spectrum since they are degenerate with the smoothing effect of lensing [91], in particular if they have a frequency similar to the acoustic peaks. It should be noted that polarization data by SPTpol shows a preference for lower values of the lensing anomaly, although within 1.4σ with ΛCDM expectations [1,32,33]. Nevertheless, the lensing anomaly may hide oscillatory features in the primordial power spectrum which could ease the tension.…”

Section: Discussionmentioning

confidence: 88%

Planck residuals anomaly as a fingerprint of alternative scenarios to inflation

Domènech,

Chen,

Kamionkowski

et al. 2020

Preprint

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The smoothing effect of lensing to the CMB temperature power spectrum is, to some extent, degenerate with oscillatory modulations of the primordial power spectrum, in particular if the frequency is close to that of the acoustic peaks. We consider the possibility that the lensing anomaly reported by the latest Planck 2018 results may be hinting at an oscillatory modulation generated by a massive scalar field during an alternative scenario to inflation or by a sharp feature during inflation. We use the full TTTEEE+low E CMB likelihood from Planck to derive constraints on these two types of models. We obtain that in both cases the AL anomaly is mildly reduced to less than 2σ. Moreover, we find that the oscillatory modulation generated during an alternative scenario presents the lowest value of χ 2 , with ∆χ 2 = −13 compared to ΛCDM. Furthermore, the Akaike Information Criterion suggests that such an oscillation constitutes an attractive candidate since it has a value ∆AIC = −5 with respect to ΛCDM, comparable to the AL parameter. Interestingly, the matter bounce and radiation bounce scenarios are compatible with our results. We discuss how these models of oscillatory features can be tested with future observations.

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“…• The lensing anomaly [41]: Oscillatory residuals between the Planck temperature power spectra and the best-fit ΛCDM model in the multipole range l ∈ [900, 1700] in opposite phase compared to the CMB and thus phenomenologically similar to the effects of gravitational lensing. This smoothing of the acoustic peaks in the temperature power spectrum could be induced by an oscillatory feature, generated during inflation [42].…”

Section: Signals In the Cmb Datamentioning

confidence: 99%

An Overview of Nonstandard Signals in Cosmological Data

Alestas

Kraniotis

Perivolaropoulos

2021

The 1st Electronic Conference on Universe

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We discuss in a unified manner many existing signals in cosmological and astrophysical data that appear to be in some tension (2σ or larger) with the standard ΛCDM as defined by the Planck18 parameter values. The well known tensions of ΛCDM include the H 0 tension the S 8 tension and the lensing (A lens ) CMB anomaly, There is however, a wide range of other, less standard signals towards new physics. Such signals include, hints for a closed universe in the CMB, the cold spot anomaly indicating non-Gaussian fluctuations in the CMB, the hemispherical temperature variance assymetry and other CMB anomalies, cosmic dipoles challenging the cosmological principle, the Lyman-α forest Baryon Accoustic Oscillation anomaly, the cosmic birefringence in the CMB, the Lithium problem, oscillating force signals in short range gravity experiments etc. In this contribution present the current status of many such signals emphasizing their level of significance and referring to recent resources where more details can be found for each signal. We also briefly mention some possible generic theoretical approaches that can collectively explain the non-standard nature of these signals. In many cases the signals presented are controversial and there is currently debate in the literature on the possible systematic origin of some of these signals. However, for completeness we refer to all the signals we could identify in the literature citing also references that dispute their physical origin.

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Lensinglike tensions in the Planck legacy release

Cited by 38 publications

References 54 publications

Pseudoscalar sterile neutrino self-interactions in light of Planck, SPT and ACT data

Pseudoscalar sterile neutrino self-interactions in light of Planck, SPT and ACT data

Planck residuals anomaly as a fingerprint of alternative scenarios to inflation

An Overview of Nonstandard Signals in Cosmological Data

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