Conveners
R2-5 Theory III (DNP) / Théorie III (DPN)
- Johnson Liang (McMaster Univsersity)
Since trapping the first cold antihydrogen atoms over 10 years ago, the ALPHA collaboration has established itself at the leading edge of antimatter science. Through a series of experiments located at the Antiproton Decelerator at CERN, the group has carried out a number of novel precision measurements, primarily on the spectral transitions of antihydrogen. ALPHA-g is the latest addition to...
Do we really need a hypothetical gauge boson, "X17", to explain the famous ATOMKI measurements? Or can there be some interplay between the theoretical and experimental effects? We show that the bump in the $^8Be(18.15)\rightarrow ^8Be +e^++e^-$ decay data can be reproduced within the Standard Model by adding the full set of second-order corrections and the interference terms to the Born-level...
In any finite system, the presence of a non-zero permanent electric dipole moment (EDM) would require both parity (P) and time-reversal (T) violation. The standard model predicts a very small CP violation and consequently any observation of the EDM would imply physics beyond the standard model. Thus, EDMs have long been proposed as a way to test these fundamental symmetries. Experimental...
An ab initio nuclear many-body calculation needs the nucleon-nucleon (NN) and three-nucleon (3N) matrix elements as an input. The NN matrix elements can be prepared in a sufficiently large space, while the 3N matrix elements are significantly limited. Due to the limitation, it is challenging to obtain reliable results for the system heavier than $A \sim 100$. Since we usually do not use all...
