BEGIN:VCALENDAR VERSION:2.0 PRODID:Data::ICal 0.22 BEGIN:VEVENT DESCRIPTION:Evie Downie\, The George Washington University\n\nThe MUSE expe riment aims to provide key missing information in the quest to resolve the proton radius puzzle: the difference between the 0.88 fm proton radius me asured in atomic hydrogen and ep elastic scattering experiments and the 0. 84 fm radius measured in muonic hydrogen. Over the last three years since the puzzle emerged\, none of the many attempts to find a solution have rea ched a universally accepted resolution. Possible solutions include novel b eyond standard model physics\, novel hadronic physics and issues and/or un derestimated uncertainties in the ep scattering data.\n
\nRecently there have been high precision electron scattering experiments at Mainz and JLa b\, and further measurements are planned. A series of excitation spectrum measurements on light nuclei are planned at PSI. The MUSE experiment will open up a new line of experimental investigations by measuring elastic mu on scattering on the proton at the PSI piM1 beamline.\n
\nMUSE will scat ter a mixed muon/pion/electron beam on a liquid hydrogen target with a Q^2 range of approximately 0.002 - 0.08 GeV2. Measurements of both μ\;+ a nd μ\;- at multiple beam momenta will enable checks of systematics\, d etermination of two-photon exchange effects and magnetic contributions\, a nd a radius determination at a similar level of precision to existing ep s cattering experiments. Simultaneous electron scattering will allow similar tests and a direct comparison of the two probes\, providing an excellent test of lepton universality. The physics background\, status\, and plans f or the experiment will be discussed. DTSTART:20130423T193000Z LOCATION:Physics Building\, Room 204 SUMMARY:The MUSE experiment: addressing the proton radius puzzle via elasti c muon scattering END:VEVENT END:VCALENDAR