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The Precision Muon Group at UW arrived Fall 2010, like many of you

The Precision Muon Group at UW arrived Fall 2010, like many of you. Mulan : G F from m + lifetime MuCap : g P from m - p capture MuSun : m - d capture calibrates basic astrophysics Muon g-2 : anomalous magnetic moment Mu2e: Charged lepton flavor violation test. Faculty

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The Precision Muon Group at UW arrived Fall 2010, like many of you

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  1. The Precision Muon Group at UWarrived Fall 2010, like many of you • Mulan: GF from m+ lifetime • MuCap: gP from m-p capture • MuSun: m-d capture calibrates basic astrophysics • Muon g-2: anomalous magnetic moment • Mu2e: Charged lepton flavor violation test • Faculty • David Hertzog, Peter Kammel (all projects) • Tianchi Zhou and Alejendro Garcia (g-2) • Postdocs: • Peter Winter, SerdarKizgul FrederikWauters • Graduate Students: • Brendan Kiburg, Sara Knaack, Jason Crnkovic, Michael Murray, Andreas Trautner, + 2 RA-supported SLOTS OPEN David Hertzog: hertzog@uw.edu http://www.npl.washington.edu/muon/

  2. Goal: 0.14 ppm Future Goals Expected Improvement • The New Muon g-2 Experiment at Fermilab • Faculty: David Hertzog, Peter Kammel, TianchiZhou and AlejendroGarcia x10-11 Experiment 3.6 s Theory

  3. p p g m Z m p p B Weak Had LbL Had VP Had VP QED am= (g – 2)/2 is non-zero because of virtual loops, which can be calculated very precisely Known well Theoretical work ongoing The “g-2 test”: Compare experiment to theory. Is SM complete?

  4. difficult to measure at LHC Example: SUSY contribution toaμ:

  5. SUSY and g-2: The power to resolve among models and break LHC degeneracies

  6. Background reduced by x20 Muon storage x10 per proton 20x Events vs BNL in 1 year Ideal muon delivery to storage ring

  7. The Ring Assembly 7

  8. Sikorsky S64F 12.5 T hook weight (Outer coil 8T) 8

  9. n p+ m+ 4 Key elements of the g-2 measurement (1) Polarized muons ~97% polarized for forward decays (2) Precession proportional to (g-2) (3) Pm magic momentum = 3.094 GeV/c E field doesn’t affect muon spin when g = 29.3 (4) Parity violation in the decay gives average spin direction µ 9

  10. The Storage Ring components affect muon storage Fast Kickers Superconducting inflector magnet incoming muons Electrostatic Quadrupoles

  11. digitized samples An “event” is an isolated positron above a threshold. e+

  12. If you find this interesting … • David Hertzog • C533 • hertzog@uw.edu • Peter Kammel • C515 • pkammel@uw.edu • And, you can talk to our current students who are here • Michael Murray (MuSun: transferred to UW) • Andreas Trautner (1st year, exchange; Belle project) • Sara Knaack, Jason Crnkovic, Brendan Kiburg (UIUC)

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