Kavli Affiliate: Masahiro Takada | First 5 Authors: Tianqing Zhang, Tianqing Zhang, , , | Summary: The combination of galaxy-galaxy weak lensing and galaxy clustering is a powerful probe of the cosmological model, and exploration of how to best model and extract this information from the signals is essential. We present the measurement of the […]

Kavli Affiliate: Masahiro Takada | First 5 Authors: Tianqing Zhang, Tianqing Zhang, , , | Summary: The combination of galaxy-galaxy weak lensing and galaxy clustering is a powerful probe of the cosmological model, and exploration of how to best model and extract this information from the signals is essential. We present the measurement of the […]

Kavli Affiliate: Misao Sasaki | First 5 Authors: Anamaria Hell, Anamaria Hell, , , | Summary: We show that a single constrained scalar field with non-minimal coupling to gravity can give rise to an accelerating Universe. First, we consider this model in the absence of external matter. In the original Jordan frame, we show that […]

Kavli Affiliate: Masahiro Kawasaki | First 5 Authors: Hiroto Yanagisawa, Hiroto Yanagisawa, , , | Summary: We present a new constraint on the primordial helium abundance, $Y_mathrmP$, based on Subaru observations. A major source of uncertainty in previous $Y_mathrmP$ determinations is the lack of extremely metal-poor galaxies (EMPGs; $0.01-0.1Z_odot$), which have metallicities a few to […]

Kavli Affiliate: Toshiya Namikawa | First 5 Authors: Toshiya Namikawa, Toshiya Namikawa, , , | Summary: The recent measurement of baryonic acoustic oscillations (BAO) by the Dark Energy Spectroscopic Instrument (DESI) reveals a mild tension with observations of the cosmic microwave background (CMB) within the standard $Lambda$CDM cosmological model. This discrepancy leads to a preference […]

Kavli Affiliate: Shunsaku Horiuchi | First 5 Authors: Cecilia Lunardini, Cecilia Lunardini, , , | Summary: We present a new, state-of-the-art computation of the Diffuse Supernova Neutrino Background (DSNB), where we use neutrino spectra from multi-dimensional, multi-second core collapse supernova simulations – including both neutron-star and black-hole forming collapses – and binary evolution effects from […]

Kavli Affiliate: Toshiya Namikawa | First 5 Authors: Toshiya Namikawa, Toshiya Namikawa, , , | Summary: We present constraints on isotropic cosmic birefringence induced by axion-like particles (ALPs), derived from the analysis of cosmic microwave background (CMB) polarization measurements obtained with the high-frequency channels of Planck. Recent measurements report a hint of isotropic cosmic birefringence, […]

Kavli Affiliate: Jia Liu | First 5 Authors: Zhuqing Liu, Zhuqing Liu, , , | Summary: Recently, multi-objective optimization (MOO) has gained attention for its broad applications in ML, operations research, and engineering. However, MOO algorithm design remains in its infancy and many existing MOO methods suffer from unsatisfactory convergence rate and sample complexity performance. […]

Kavli Affiliate: Hitoshi Murayama | First 5 Authors: Hitoshi Murayama, Bea Noether, Jan Schütte-Engel, , | Summary: Leptogenesis is arguably the best motivated theory of baryogenesis given the discovery of finite neutrino masses, yet its experimental test is elusive given its high energy scale. We discuss gravitational waves (GWs) produced via graviton bremsstrahlung in right-handed […]

Kavli Affiliate: Toshiyuki Kobayashi | First 5 Authors: Toshiyuki Kobayashi, , , , | Summary: This exposition presents recent developments on proper actions, highlighting their connections to representation theory. It begins with geometric aspects, including criteria for the properness of homogeneous spaces in the setting of reductive groups. We then explore the interplay between the […]