Measurement of the Michel rho parameter in direct muon decay

Journal Article · Tue May 20 04:00:00 EDT 1997 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.54303· OSTI ID:21175481

Piilonen, Leo; Haim, D; Lee, F S; Zhang, Y ^[1]; Amann, J F; Bolton, R D; Cooper, M D; Foreman, W; Harrison, R; Hart, G; Hogan, G E; Kozlowski, T; Kroupa, M A; Mischke, R E; Pillai, C; Schilling, S; Whitehouse, D ^[2]; Chen, Y; Dzemidzic, M; Hungerford, III, E V ^[3]

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1. Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061 (United States)
2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
3. University of Houston, Houston, Texas 77004 (United States)

We report on the status of LAMPF experiment E-1240 to measure the Michel {rho} parameter in direct muon decay. This experiment ran in 1993, and the data are currently being analyzed. The expected precision on the {rho} parameter is {+-}0.0008. This result will provide better constraints on new physics, particularly on the charged vector bosons' mixing angle {zeta} in the manifestly left-right symmetric extension of the Standard Model.

• OSTI ID: 21175481
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 412; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCURACY
INTERMEDIATE VECTOR BOSONS
LAMPF II SYNCHROTRON
MUONS
STANDARD MODEL
WEINBERG ANGLE