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Global analysis of muon decay measurements | | C. A. Gagliardi
; R. E. Tribble
; N. J. Williams
; | | Date: |
7 Sep 2005 | | Subject: | hep-ph | | Abstract: | We have performed a global analysis of muon decay measurements to establish model-independent limits on the space-time structure of the muon decay matrix element. We find limits on the scalar, vector and tensor coupling of right- and left-handed muons to right- and left-handed electrons. The limits on those terms that involve the decay of right-handed muons to left-handed electrons are more restrictive than in previous global analyses, while the limits on the other non-standard model interactions are comparable. The value of the Michel parameter eta found in the global analysis is -0.0036 pm 0.0069, slightly more precise than the value found in a more restrictive analysis of a recent measurement. This has implications for the Fermi coupling constant G_F. | | Source: | arXiv, hep-ph/0509069 | | Services: | Forum | Review | PDF | Favorites | |
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