A New Muon Beamline and Leptn Flavor Violation Experiment at 一个新的子光束线和轻子味破坏试验.pptVIP

May 2 2007 William Molzon, UC Irvine Muon Physics at Fermilab Muon Physics at Fermilab Will the physics be important in a global context when the experiment is done? Can it be done at Fermilab with reasonable resources in a reasonable time? Can it be done uniquely or substantially better at Fermilab than at other labs? Is the experiment unique in its physics reach? Possible Muon Physics Experiments 1 Study of Michel decays of muons – test of precision electroweak physics Stopping m+ beam (very low rate) Currently being done at TRIUMF First result arxiv.org/PS_cache/hep-ex/pdf/0409/0409063v1.pdf Best done at low energy facilities, no special muon beam properties Measurement of muon lifetime – precise measurement of Fermi coupling constant Low intensity positive muon beam – no special beam characteristics MuLan result Measurement of muon capture on protons – nucleon axial form factor Relatively low intensity m- beam Currently being done at PSI MuCap Results Probably none of these are good candidates for Fermilab, but might be done parasitically at a flexible muon facility Possible Muon Physics Experiments 2 Measurement of muon g-2 – search for non-SM physics Potential contributions from any kinds of loop, in particular supersymmetry ~3 GeV m+ and m- beams – magic g Best result from BNL – hint of non-SM value Used large fraction of BNL intensity (~100kW) Limited by experiment and theory of the SM contributions – improvements possible Next generation needs 100X muon flux (10x precision) – higher power, more efficient beam JPARC LOI – 5-10 improvement over current BNL result ~1012 detected muon decays Large fraction of JPARC beam power with many very short pulses Fermilab at 8 GeV probably not competitive if limited to a fraction of the full beam power (energy too low for 3 GeV pion production, but should be checked) Measurement of muon electric dipole moment – non-SM CP violation Goal of ~10-24 e?cm (w