In the past decade many charmonium-like states were observed experimentally. Especially
those charged charmonium-like Z c states and bottomonium-like Z b states cannot be …

This article reviews recent developments in tests of fundamental physics using atoms and
molecules, including the subjects of parity violation, searches for permanent electric dipole …

We describe the 2017 release of the spectral synthesis code CLOUDY, summarizing the
many improvements to the scope and accuracy of the physics which have been made since …

Positronium is the simplest bound state, built of an electron and a positron. Studies of
positronium in vacuum and its decays in medium tell us about quantum electrodynamics …

Positron annihilation spectroscopy is particularly suitable for studying vacancy-type
defects<? format?> in semiconductors. Combining state-of-the-art experimental and …

The field of laser-matter interaction traditionally deals with the response of atoms, molecules,
and plasmas to an external light wave. However, the recent sustained technological …

A highly excited atom having an electron that has moved into a level with large principal
quantum number is a hydrogen-like object, termed a Rydberg atom. The giant size of …

The question of whether there exist bound states of two heavy quarks Q=(c, b) and
antiquarks Q¯=(c¯, b¯), distinct from a pair of quark-antiquark mesons, has been debated for …

In recent years, there has been a wealth of new science involving low-energy antimatter (ie,
positrons and antiprotons) at energies ranging from 10 2 to less than 10-3 eV. Much of this …

As hosts for tightly-bound electron-hole pairs carrying quantized angular momentum,
atomically-thin semiconductors of transition metal dichalcogenides (TMDCs) provide an …