Experiments: Precision and Low Energy: Tuesday Early
- David Flay (Thomas Jefferson National Accelerator Facility)
- Juliette Mammei (Thomas Jefferson National Accelerator Facility)
Zoom Room: TIPP2021 Parallel Room 5
(see e-mail sent to registered participants for connection details)
The PiHe collaboration recently used the 590 MeV ring cyclotron facility of Paul Scherrer Institute to carry out laser spectroscopy of metastable pionic helium atoms [1,2]. This is a three-body atom consisting of a helium nucleus, a ground-state electron, and a negatively-charged pion occupying a Rydberg state of principal and orbital angular momentum quantum numbers of around n=17 and l=16....
40K is one of very few isotopes that allow comparison of a third-forbidden unique decay with first-forbidden unique decay. It is also a source of uncertainty in certain dark matter searches, and in K-based geochronology dating techniques. In particular, one decay branch of 40K has never been experimentally measured: the electron capture directly to the ground state of 40Ar, expected to be of...
The PADME experiment aims at searching signals of a dark photon A’. This is done evaluating the final state missing mass of the process e+ e− → A'γ by knowing the beam energy and measuring the four-momentum of the ordinary recoil photon. The determination of this quantity, and the capability to reject the background, are the key points for the success of the experiment.
Three charged particle...
The Mu2e experiment is designed to search for the charged-lepton-flavor-violating
process, $\mu^-$ to a $e^-$, with unprecedented sensitivity. The single 105-MeV
electron that results from this process can be mimicked by electrons produced by
cosmic-ray muons traversing the detector. An active veto detector surrounding
the apparatus is used to detect incoming cosmic-ray muons. To reduce...
J-PET is the first facility of its kind developed for applications in both medical and particle physics . Recently, a new prototype based on modular construction (24 modules) is commissioned . Each module is made of 13 plastic scintillators and can be used as a standalone, compact, and portable detection unit. In the framework of J-PET, the decays of positronium atoms in their ground...