8 papers
The COSMIC WISPers White Paper: The physics case for Weakly Interacting Slim Particles
Ariel Arza, Deniz Aybas, Shyam Balaji +124
Axions and other very weakly interacting slim particles (WISPs), with masses below 1 GeV, arise naturally in many extensions of the Standard Model of particle physics. In particula…
Planck Constraints on Axion-Like Particles through Isotropic Cosmic Birefringence
Toshiya Namikawa, Kai Murai, Fumihiro Naokawa
We present constraints on isotropic cosmic birefringence induced by axion-like particles (ALPs), derived from the analysis of cosmic microwave background (CMB) polarization measure…
Resolving the negative effective neutrino mass parameter with cosmic birefringence
Toshiya Namikawa
The recent measurement of baryonic acoustic oscillations by the Dark Energy Spectroscopic Instrument reveals a mild tension with observations of the cosmic microwave background (CM…
Tomographic constraint on anisotropic cosmic birefringence
Toshiya Namikawa
We constrain anisotropic cosmic birefringence generated at reionization using Planck PR4 polarization data for the first time. Several recent analyses of WMAP and Planck polarizati…
Exact CMB B-mode power spectrum from anisotropic cosmic birefringence
Toshiya Namikawa
We calculate the cosmic microwave background (CMB) -mode power spectrum resulting from anisotropic cosmic birefringence, without relying on the thin approximation of the last sc…
Systematic effects on lensing reconstruction from a patchwork of CMB polarization maps
Ryo Nagata, Toshiya Namikawa
We investigate the tolerance for systematic errors in lensing analysis applied to a patchwork map of Cosmic Microwave Background polarization. We focus on the properties of the ind…