REVIEW 6 cited by
Cosmological Constraint on Dark Photon from $N_{\rm eff}$
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
abstract
A new U(1) gauge symmetry is the simplest extension of the Standard Model and has various theoretical and phenomenological motivations. In this paper, we study the cosmological constraint on the MeV scale dark photon. After the neutrino decoupling era at $T = \mathcal{O}(1)\,$MeV, the decay and annihilation of the dark photon heats up the electron and photon plasma and accordingly decreases the effective number of neutrino $N_{\mathrm{eff}}$ in the recombination era. We derive a conservative lower-limit of the dark photon mass around 8.5 MeV from the current Planck data if the mixing between the dark photon and ordinary photon is larger than $\mathcal{O}(10^{-9})$. We also find that the future CMB stage-$\rm I\! V$ experiments can probe up to 17 MeV dark photon.
Forward citations
Cited by 6 Pith papers
-
Light Dark Matter Discovery Potential and Model Selection at LDMX
LDMX Phase II is projected to discover R=2.5 thermal complex-scalar DM at 5σ and to discriminate dark-photon electromagnetic-moment models via 2D Bayes factors.
-
Probing Dark Photons from Nuclear De-excitation in Reactor Neutrino Experiment
Nuclear de-excitation in reactors produces on-shell dark photons up to nuclear transition energies, yielding stronger TEXONO limits on ε than Compton-like production for 0.1 MeV < m_A' < 6.9 MeV.
-
Dark Photons in the Early Universe: From Thermal Production to Cosmological Constraints
Dark photon thermal production is computed analytically, yielding a fixed 4πe/27 ≈ 0.14 resonance-to-inverse-decay ratio and new cosmological limits down to ε~10^-12 over 0.1–6 MeV.
-
Consistent $N_{\rm eff}$ fitting in big bang nucleosynthesis analysis
Conventional BBN fitting for negative Delta N_eff is unphysical; a consistent treatment via entropy dilution after neutrino decoupling yields significantly different bounds.
-
Dark Photons from Red Dwarfs
Red dwarf mass-radius data from eclipsing binaries combined with dark-photon-inclusive evolution simulations produce competitive constraints on light dark photons.
-
Direct Detection and Cosmological Constraints of Dark Matter with Dark Dipoles
Cosmological and direct-detection data already exclude most sub-GeV dark-matter parameter space for dark-photon magnetic dipole interactions, with semiconductor detectors needed to probe the remaining electric-dipole ...
Discussion (0). Sign in to comment.