PRECISE MEASUREMENT OF THE SIGMA(0) MASS

Authors
WANG MHLS HARTOUNI EP KREISLER MN URIBE J CHURCH MD GOTTSCHALK EE KNAPP BC STERN BJ WIENCKE LR CHRISTIAN DC GUTIERREZ G WEHMANN A AVILEZ C FELIX J MORENO G FORBUSH M HUSON FR WHITE JT
Citation
Mhls. Wang et al., PRECISE MEASUREMENT OF THE SIGMA(0) MASS, Physical review. D. Particles and fields, 56(5), 1997, pp. 2544-2547
Citations number
31
Categorie Soggetti
Physics, Particles & Fields
Journal title
Physical review. D. Particles and fields → ACNP
ISSN journal
05562821
Volume
56
Issue
5
Year of publication
1997
Pages
2544 - 2547
Database
ISI
SICI code
0556-2821(1997)56:5<2544:PMOTSM>2.0.ZU;2-6
Abstract
We have obtained precise measurements of the Sigma(0) mass and the Sig ma(0)-Lambda(0) mass difference from a fit to the Lambda(0) gamma inva riant mass distribution of 3327 Sigma(0)-->Lambda(0)+gamma decays. Our measurements yield M-Sigma 0 = 1192.65 +/- 0.020 +/- 0.014 MeV/c(2) a nd M-Sigma 0-M-Lambda 0 = 76.966 +/- 0.020 +/- 0.013 MeV/c(2), where t he uncertainties are statistical and systematic in that order. This re presents a significant improvement over all previous determinations an d is the first direct measurement of the Sigma(0) mass itself.