Precision measurement of the magnetic moment of the sigma minus hyperon
A new measurement of the magnetic moment of the ..sigma../sup -/ hyperon has been made and the result is ..mu..(..sigma../sup -/) = -1.111 +/- 0.031 +/- 0.011 nuclear magnetons. Negative kaons from a low-energy separated beam at the Alternating Gradient Synchrotron of the Brookhaven National Laboratory were brought to rest in a novel laminar target consisting of thin metal foils immersed in liquid hydrogen. The production of ..sigma../sup -/ hyperons occurred primarily through the reaction K/sup -/p ..-->.. ..sigma../sup -/..pi../sup +/. ..sigma../sup -/ hyperon production was tagged by the identification of the energetic ..pi../sup +/. Many of the ..sigma../sup -/ so produced stopped in nearby foils of Pb (or W) where atomic capture into a highly excited state could occur. The energies of the subsequent de-excitation x-rays were recorded with three high-resolution intrinsic Ge detectors located below the target. The tagging technique resulted in an enhancement of 15 in x-ray signal-to-noise compared to that of previous ..sigma../sup -/ exotic atom experiments. The ..sigma..-Pb(11-10), ..sigma..-Pb(12-11), and ..sigma../sup -/W(11-10) transitions were analyzed for fine-structure from which the ..sigma../sup -/ magnetic moment was deduced. Self-consistent results were obtained from the three transitions and from the data accumulated in each detector.
- Research Organization:
- College of William and Mary, Williamsburg, VA (USA)
- OSTI ID:
- 5544500
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SIGMA MINUS
MAGNETIC MOMENTS
BROOKHAVEN AGS
ENERGY-LEVEL TRANSITIONS
EXPERIMENTAL DATA
HYPERFINE STRUCTURE
HYPERNUCLEI
KAON MINUS-PROTON INTERACTIONS
METALS
PARTICLE PRODUCTION
PIONS PLUS
TARGETS
ACCELERATORS
BARYONS
BOSONS
CYCLIC ACCELERATORS
DATA
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
HYPERONS
INFORMATION
INTERACTIONS
KAON-NUCLEON INTERACTIONS
KAON-PROTON INTERACTIONS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
NUCLEAR FRAGMENTS
NUCLEI
NUMERICAL DATA
PARTICLE INTERACTIONS
PIONS
PSEUDOSCALAR MESONS
SIGMA PARTICLES
STRANGE PARTICLES
SYNCHROTRONS
645101* - High Energy Physics- Particle Interactions & Properties-Experimental- Electromagnetic Interactions & Properties
645104 - High Energy Physics- Particle Interactions & Properties-Experimental- Strong Meson-Induced Interactions- (-1987)