Measurement of the Michel parameter {rho} in normal muon decay

Journal Article · Mon Jul 10 04:00:00 EDT 1995 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.48444· OSTI ID:253241

Tu, X ^[1]; Amann, J F; Bolton, R D ^[2]; Chen, Y ^[3]; Cooper, M D ^[2]; Cooper, P S ^[4]; Dzemidzic, M ^[3]; Foreman, W ^[2]; Gagliardi, C A ^[1]; Haim, D ^[5]; Harrison, R; Hart, G; Hogan, G E ^[2]; Hungerford, III, E V ^[3]; Jui, C C.H. ^[6]; Knott, J E ^[7]; Koetke, D D ^[8]; Kozlowski, T; Kroupa, M A ^[2]; Lan, K ^[3] ; Liu, F ^[1]; Manweiler, R ^[8]; Mayes, II, B W ^[3]; Mischke, R E ^[2]; Otis, J N ^[6]; Piilonen, L E

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1. Texas A&M University, College Station, Texas 77843 (United States)
2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
3. University of Houston, 4800 Calhoun Road, Houston, Texas 77004 (United States)
4. Femilab, P.O. Box 500, Batavia, Illinois 60510 (United States)
5. Virginia Polytechnc Institute & State University, Blacksburg, VA 24061 (United States)
6. Stanford University, Stanford, California 94305 (United States)
7. Indiana University, Bloomington, Indiana 47405 (United States)
8. Valparaiso University, Valparaiso, Indiana 46383 (United States)

A new measurement of the Michel parameter {rho} in normal muon decay has been performed using the MEGA positron spectrometer. Over 500 million triggers were recorded and the data are currently being analyzed. The previous result has a precision on the value of {rho}{plus_minus}0.0026. The present experiment expects to improve the precision to {plus_minus}0.0008 or better. The improved result will be a precise test of the standard model of electroweak interactions for a purely leptonic process. It also will provide a better constraint on the {ital W}{sub {ital R}}{minus}{ital W}{sub {ital L}} mixing angle in the left-right symmetric models. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

• Sponsoring Organization: USDOE
• OSTI ID: 253241
• Report Number(s): CONF-940514--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 338; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANTINEUTRINOS
CABIBBO ANGLE
ELECTRONS
LEPTONIC DECAY
MUONS
NEUTRINOS
STANDARD MODEL