Phys. Rev. Lett. 106, 041804 (2011) [4 pages]Experimental Constraints on Left-Right Symmetric Models from Muon Decay
The TWIST Collaboration has completed a new measurement of the energy-angle spectrum of positrons from the decay of highly polarized muons. A simultaneous measurement of the muon decay parameters ρ, δ, and Pμπξ tests the standard model in a purely leptonic process and provides improved limits for relevant extensions to the standard model. Specifically, for the generalized left-right symmetric model |(gR/gL)ζ|<0.020 and (gL/gR)m2>578 GeV/c2, both 90% C.L. This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. © 2011 American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.106.041804
DOI:
10.1103/PhysRevLett.106.041804
PACS:
13.35.Bv, 12.60.Cn, 14.60.Ef
See AlsoSee Also: D. M. Webber et al. (MuLan Collaboration), Measurement of the Positive Muon Lifetime and Determination of the Fermi Constant to Part-per-Million Precision, Phys. Rev. Lett. 106, 041803 (2011). |
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