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DTSTAMP:20260411T084708
DTSTART:20180928T113000
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URL:https://murmitoyen.com/events/vanille/udem/detail/822187-spectroscopic-
 studies-of-antihydrogen-art-olin-triumf-and-uvictoria
LOCATION:Pavillon Roger-Gaudry \, 2900\, boul. Édouard-Montpetit\, Local M
 -415\, Montréal\, QC\, Canada
SUMMARY:Spectroscopic Studies of Antihydrogen - Art Olin (TRIUMF and UVicto
 ria)
DESCRIPTION:Cold atoms of antihydrogen promise a unique opportunity to stud
 y the properties of atomic antimatter\, and via comparisons with its well-
 studied matter-counterpart\, the possibility to test fundamental symmetrie
 s such as CPT invariance. In order to probe matter-antimatter symmetry at 
 the highest possible precision\, it is essential that the anti-atoms be su
 spended in vacuum to allow for detailed interrogation via laser light or m
 icrowaves. The ALPHA experiment\, running at the CERN antimatter factory\,
  is now trapping sufficient numbers of antihydrogen atoms to enable these 
 studies. 
\nThe best measurements in hydrogen are of the 1S-2S transition
 s (precision 10-14\, determining the Rydberg)\,   the ground state hyperf
 ine interval (precision 10-12)\, and the 2S-2P Lamb shift.  The spectrosc
 opy of the 1S-2P levels is also of interest for laser cooling the anti-ato
 ms to achieve improved precision of the previously mentioned transitions. 
 The trap environment is particularly challenging and requires adaptation o
 f the usual AMO techniques. I will discuss recent measurements of these tr
 ansitions in antihydrogen\, where we have recently reported a 1S-2S measur
 ement with 2 10-12 precision\, and discuss prospects for further improveme
 nt. 
\nALPHA collaboration http://alpha-new.web.cern.ch
\nLa conférence 
 est pour tout public et le café est servi dès 11h30.
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