Conveners
W2-4 Fundamental Symmetries and new physics at low energy II (DNP) | Symétries fondamentales et nouvelle physique à basse énergie II (DPN)
- Russell Mammei
Low-energy precision tests of electro-weak physics keep playing an essential role in the search for new physics beyond the Standard Model. Atomic parity violation (APV) experiments measure the strength of highly forbidden atomic transitions induced by the exchange of Z bosons between electrons and quarks in heavy atoms. APV is sensitive to additional interactions such as leptoquarks, and...
Atomic parity-violation (APV) experiments play an important role as low-energy, neutral current, searches for physics beyond the Standard Model. Francium is an ideal candidate for APV experiments due to its high-Z and single valence electron. Our planned Fr APV experiment will probe the 7s−8s transition (506 nm) in an external electric field. Relativistic effects and hyperfine interactions...
Low-energy precision electro-weak physics tests are advocated as part of the search for physics beyond the Standard Model. We are working towards a measurement of atomic parity violation (APV) in francium, Fr (Z = 87), the heaviest alkali in a magneto-optical trap (MOT) online to ISAC at TRIUMF. The transition of interest in Fr is between the 7S and 8S states, where the parity violating (PV)...
The antimatter equivalent of the hydrogen atom, antihydrogen, is an outstanding testbed for studies of matter-antimatter symmetry. Here we report the first simultaneous observation, with few ppt precision, of the d→d and c→c hyperfine components of the 1S-2S transition in antihydrogen trapped in a 1T magnetic field. Our c→c measurement is the first in either hydrogen or antihydrogen, while...
The ALPHA (Antihydrogen Laser PHysics Apparatus) collaboration aims to test fundamental symmetries with matter and antimatter by testing CPT (charge conjugation, parity reversal, time reversal) theory and observing whether antimatter follows Einstein’s Weak Equivalence Principle (WEP), where the acceleration due to gravity that a body experiences is independent of its structure or composition....
