Measurement of theΣ−Magnetic Moment Using theΣ−→ne−ν¯andΣ−→nπ−Decay Modes

Authors :: E. McCliment
R. Raja
I. I. Tkatch
G. Zapalac
E. C. Swallow
D. M. Seliverstov
R. Winston
V.A. Schegelsky
A. S. Denisov
E. Jastrzembski
A. E. Brenner
N. Smirnov
J. Tang
D. Muller
N. K. Terentyev
E. W. Anderson
J. P. Marriner
V. T. Grachev
Panos A Razis
P. S. Cooper
Vincent J Smith
C. R. Newsom
An.A. Vorobyov
P. Grafström
L. J. Teig
J. Lach
J. P. Berge
S. Y. Hsueh
Source :: Physical Review Letters. 57:1526-1529
Publication Year :: 1986
Publisher :: American Physical Society (APS), 1986.
Abstract: We have used the spin-precession technique to measure the ..sigma../sup -/ magnetic moment (..mu../sub ..sigma../). A ..sigma../sup -/ beam with a polarization of 22% was produced by a 400-GeV proton beam striking a Cu target at nominal production angles of +- 3 mrad. We simultaneously recorded 21X0 ..sigma../sup -/..-->..ne/sup -/nu-bar decays and 650X0 ..sigma../sup -/..-->..n..pi../sup -/ decays at ..sigma../sup -/ beam momenta of 253 and 308 GeV/c. We find that ..mu../sub ..sigma../ = -1.166 +- 0.014 +- 0.010 nuclear magnetons, where the quoted errors are statistical and systematic, respectively.