What are the constraints on antimatter in the early universe from CMB observations?

Positron Physics; Electronic structure. Positron annihilation and electron momentum. When a positron is implanted in a sample and annihilates with an electron ... 4th Workshop of the 2nd ECFA / DESY Study on Physics and Detectors for a Linear Electron - Positron Collider. 20-23 March 1999. Oxford,; United Kingdom. The positron has the opposite charge and magnetic moment, and the same mass (511.0034 keV/c 2 ) and spin as the electron. ... positron beam." AIP Conference Proceedings, vol. 2182, no. 1, p. 050022 ... Physics, vol 71, pp. 73-116 (2020). Kimberley R. Cousins, Timothy Usher ... The depth dependent positron lifetime is measured with PLEPS at NEPOMUC. Surface analysis with topmost layer sensitivity is performed via high-energy positron ... Nov 23, 2022 ... Mills and Tom are using positrons to study positronium atoms. Such experiments can shed light on the fundamental properties of charged ... Contact us · Back to 'Particle and Nuclear Physics'. The Positron Imaging Centre is home to the technique of Positron Emission Particle Tracking (PEPT). The ... Professor Gidley is developing and applying positron and positronium spectroscopies to probe porous materials at and below the nanometer scale. In all cases, the initial positron en- ergies are much higher than the thermal energies of the ambient particles. The positrons lose energy continuously via ... Jan 4, 2012 ... ... positron emission or beta plus decay, and it is another type ... Physicist Brian Cox explains quantum physics in 22 minutes. Big Think ...