Cosmological birefringence due to CPT-even Chern–Simons-like term with Kalb–Ramond and scalar fields

Ho, Shih-Hao; Kao, W. F.; Bamba, Kazuharu; Geng, Chao–Qiang

doi:10.1140/epjc/s10052-015-3426-5

Cited by 4 publications

(14 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is, however, a minus sign derived from the cyclic field nature of the dual transform. A resolution to this problem can be done by performing a Routh transformation [90][91][92]98,99,101]. A heuristic derivation is shown in the "Appendix A" with the introduction of the Routh transformation.…”

Section: The Five Dimensional Scalar-vector-kalb-ramond Theorymentioning

confidence: 99%

“…Note that the two scalar fields model is a generalization of the one scalar field model [79,[83][84][85][86][87][90][91][92]94,95,[98][99][100]. As a result, the field equations can be derived from the action (A18):…”

Section: Dual Transformmentioning

confidence: 99%

“…In addition, κ is a constant that can be either positive or negative corresponding to the KR or anti-KR field. Ignoring the irrelevant coupling term κh 2 for the moment, the field equations of the KR field can be derived from the action (A1) as [83][84][85][90][91][92]98,99] …”

Section: Appendix A: 5d Kalb-ramond Field and Its Dual Gauge Fieldmentioning

confidence: 99%

“…Therefore the 5D KR model is a 5D extension of the KSW model. Note also that the KR theory has been studied extensively [83][84][85][86][87][88][89][90][91][92][93][94][95][96][97][98][99][100]. For example, its black hole solutions can be found in Refs.…”

Section: Introductionmentioning

confidence: 99%

“…[94][95][96][97]. More interestingly, the cosmological birefringence and large-scale magnetic fields effects have been discussed in the context of a CPT-even dimension-six Chern-Simons-like coupled with Kalb-Ramond and scalar fields [98,99]. The KR field has also been used to reexamine the hierarchy problem in a Randall-Sundrum scenario [100].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Anisotropic power-law inflation of the five dimensional scalar–vector and scalar-Kalb–Ramond model

Tuan

Kao

2018

Eur. Phys. J. C

Self Cite

View full text Add to dashboard Cite

We will study the cosmological implications of the five dimensional scalar-vector and scalar-Kalb-Ramond model. In particular, a new set of Bianchi type I power-law analytic solution will be obtained for this model. The cosmic no-hair conjecture can be shown to break down in the presence of the scalar-vector and scalar-Kalb-Ramond couplings. The effect of the Kalb-Ramond field in the presence of the power-law solution will be shown explicitly. We will also show that the presence of a phantom field does, however, destabilize the corresponding Bianchi type I power-law inflationary solutions.

show abstract

Section: The Five Dimensional Scalar-vector-kalb-ramond Theorymentioning

confidence: 99%

Section: Dual Transformmentioning

confidence: 99%

Section: Appendix A: 5d Kalb-ramond Field and Its Dual Gauge Fieldmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Anisotropic power-law inflation of the five dimensional scalar–vector and scalar-Kalb–Ramond model

Tuan

Kao

2018

Eur. Phys. J. C

Self Cite

View full text Add to dashboard Cite

show abstract

Can we explain cosmic birefringence without a new light field beyond Standard Model?

Nakai,

Namba,

Obata

et al. 2024

J. High Energ. Phys.

View full text Add to dashboard Cite

The recent analysis of the Planck 2018 polarization data shows a nonzero isotropic cosmic birefringence (ICB) that is not explained within the ΛCDM paradigm. We then explore the question of whether the nonzero ICB is interpreted by the framework of the Standard Model Effective Field Theory (SMEFT), or at the energy scales of the cosmic microwave background, the low-energy EFT (LEFT) whose dynamical degrees of freedom are five SM quarks and all neutral and charged leptons. Our systematic study reveals that any operator in the EFT on a cosmological background would not give the reported ICB angle, which is observationally consistent with frequency independence. In particular, we estimate the size of the ICB angle generated by the effect that the cosmic microwave background photons travel through the medium of the cosmic neutrino background with parity-violating neutrino-photon interactions and find that it would be too small to explain the data. If the reported ICB angle should be confirmed, then our result would indicate the existence of a new particle that is lighter than the electroweak scale and feebly interacting with the SM particles.

show abstract

Cosmic birefringence from neutrino and dark matter asymmetries

Zhou

Huang

Geng

2023

J. Cosmol. Astropart. Phys.

View full text Add to dashboard Cite

In light of the recent measurement of the nonzero Cosmic Microwave Background (CMB) polarization rotation angle from the Planck 2018 data, we explore the possibility that such a cosmic birefringence effect is induced by coupling a fermionic current with photons via a Chern-Simons-like term. We begin our discussion by rederiving the general formulae of the cosmic birefringence angle with correcting a mistake in the previous study. We then identify the fermions in the current as the left-handed electron neutrinos and asymmetric dark matter (ADM) particles, since the rotation angle is sourced by the number density difference between particles and antiparticles. For the electron neutrino case, with the value of the degeneracy parameter ξν e recently measured by the EMPRESS survey, we find a large parameter space which can explain the CMB photon polarization rotations. On the other hand, for the ADM solution, we consider two benchmark cases with Mχ = 5 GeV and 5 keV. The former is the natural value of the ADM mass if the observed ADM and baryon asymmetry in the Universe are produced by the same mechanism, while the latter provides a warm DM candidate. In addition, we explore the experimental constraints from the CMB power spectra and the DM direct detections.

show abstract

Cosmological birefringence due to CPT-even Chern–Simons-like term with Kalb–Ramond and scalar fields

Cited by 4 publications

References 62 publications

Anisotropic power-law inflation of the five dimensional scalar–vector and scalar-Kalb–Ramond model

Anisotropic power-law inflation of the five dimensional scalar–vector and scalar-Kalb–Ramond model

Can we explain cosmic birefringence without a new light field beyond Standard Model?

Cosmic birefringence from neutrino and dark matter asymmetries

Contact Info

Product

Resources

About