[Triumf-seminars] TRIUMF Special Seminar, Fri 2022-05-06 at 08:00

[TRIUMF Seminars]

Date/Time: Fri 2022-05-06 at 08:00  

Location: Remote  

Speaker: Chris Rasmussen (CERN)  

Title: Probing fundamental symmetries with trapped antihydrogen  

Abstract: Antihydrogen - the antimatter equivalent of the hydrogen atom - is a unique platform for testing fundamental symmetries. In particular, CPT symmetry (Charge, Parity and Time) requires that the spectrum of antihydrogen be identical to its ordinary matter cousin. In the ALPHA experiment at CERN, antihydrogen atoms are synthesized and magnetically trapped to enable precise measurements and comparison to hydrogen. Recently, we have measured the 1S-2S transition with a relative error of just 2 parts in a trillion - the most precise direct measurement on an antimatter system to date. 

Einstein’s weak equivalence principle (WEP) provides another prediction for antimatter which has yet to be tested experimentally: that the gravitational acceleration of antimatter should be equal to that of ordinary matter.  ALPHA-g is a new experiment which will measure this acceleration directly through careful release of magnetically trapped antihydrogen atoms and recording of their annihilation positions.

***
Remote connection: 
https://ubc.zoom.us/j/61455833625?pwd=YVAzMCtoNldaNnpjUW93bEVYeUFzdz09
Meeting ID: 614 5583 3625
Passcode: 672657
  

Note the unusual early time!!!