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SUMMARY:Muonium 1S-2S spectroscopy with improved statistics
DTSTART;VALUE=DATE-TIME:20220901T164000Z
DTEND;VALUE=DATE-TIME:20220901T170000Z
DTSTAMP;VALUE=DATE-TIME:20220826T122331Z
UID:indico-contribution-3833@indico.stfc.ac.uk
DESCRIPTION:Speakers: Shinsuke Yamamoto ()\nOur purpose is precision measu
 rement of the 1S-2S energy interval in Muonium\, which is an exotic hydrog
 en-like atom consists of a positive muon and an electron. This purely lept
 onic system enables a precise calculation of the energy interval with the 
 Standard Model without any concerns of the uncertainty from the charge rad
 ius of the nucleus\, unlike the hydrogenatom. This advantage motivates us 
 to measure the precise 1S-2S energy interval in Muonium with technology of
  laser spectroscopy and to determine the muon mass with the highest accura
 cy of 10 ppb. The improvement of muon mass accuracy has an impact on verif
 ication of the Standard Model\, muon g-2/EDM experiment\, for example. In 
 addition\, our technique of Muonium laser ionization is related to muon ac
 celerator or muon microscope.\n\nThe energy interval accuracy has been sta
 tistically limited since 1999[1]. However\, more powerful muon beam is ava
 ilable now at J-PARC in Japan and we are developing new UV laser system. \
 n\nWe will report a recent result of Muonium 1S-2S energy interval measure
 ment at J-PARC. The event rate in our experiment is 50 times higher than t
 he previous experiment. This dramatic improvement gives promising prospect
  for higher accuracy of 1S-2S energy interval and the muon mass accuracy i
 n the future. \n[1]V. Meyer et al\, Phys. Rev. Lett 84\, 1136(2000)\n\nhtt
 ps://indico.stfc.ac.uk/event/53/contributions/3833/
LOCATION:Science and Technology Campus\, University of Parma
URL:https://indico.stfc.ac.uk/event/53/contributions/3833/
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