The turn of the 21st century witnessed a sudden shift in our fundamental understanding of
particle physics. While the minimal Standard Model predicts that neutrino masses are …

This book lays out the scientific goals to be addressed by the next-generation ground-based
cosmic microwave background experiment, CMB-S4, envisioned to consist of dedicated …

Transition Edge Sensors (TESs) are amongst the most sensitive cryogenic detectors and
can be easily optimized for the detection of massive particles or photons ranging from X-rays …

We describe a series of microcalorimeter X-ray spectrometers designed for a broad suite of
measurement applications. The chief advantage of this type of spectrometer is that it can be …

Cosmology is well suited to study the effects of long range interactions due to the large
densities in the early Universe. In this article, we explore how the energy density and …

The determination of the effective electron neutrino mass via kinematic analysis of beta and
electron capture spectra is considered to be model-independent since it relies on energy …

We present a comprehensive investigation of electron capture ratios spanning a broad
range of atomic numbers. The study employs a self-consistent computational method that …

Low Temperature Detectors have been used to measure embedded radioisotopes in a
measurement mode known as Decay Energy Spectroscopy (DES) since 1992. DES …

Neutrinos are the most elusive among the known elementary particles, because of their
feeble interactions with ordinary matter. They are also the most mysterious, because of their …

Determining the electron neutrino mass by electron capture in 163 Ho relies on an accurate
understanding of the differential electron capture nuclear decay rate as a function of the …