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Measurement of Muon Capture on the Proton to 1% Precision and Determination of the Pseudoscalar Coupling g{sub P} [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2013.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
012,504 : digital, PDF file
Additional Creators
University of California, Berkeley, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The MuCap experiment at the Paul Scherrer Institute has measured the rate Λ{sub S} of muon capture from the singlet state of the muonic hydrogen atom to a precision of 1%. A muon beam was stopped in a time projection chamber filled with 10-bar, ultrapure hydrogen gas. Cylindrical wire chambers and a segmented scintillator barrel detected electrons from muon decay. Λ{sub S} is determined from the difference between the μ{sup −} disappearance rate in hydrogen and the free muon decay rate. The result is based on the analysis of 1.2×10¹° μ{sup −} decays, from which we extract the capture rate Λ{sub S} =(714.9±5.4{sub stat} ±5.1{sub syst} ) s{sup −1} and derive the proton’s pseudoscalar coupling g{sub P} (q²₀ =−0.88m²{sub μ} )=8.06±0.55 .
Report Numbers
E 1.99:final technical report
final technical report
Subject(s)
Note
Published through SciTech Connect.
01/01/2013.
"final technical report"
Physical Review Letters 110 ISSN 0031-9007 FT
Freedman, Stuart; Banks, Tom.
Funding Information
FG02-00ER41129
View MARC record | catkey: 14667942