First measurement of form factors of the decay Xi(0)->Sigma(+) e(-)(nu)over-bar(e) - art. no. 132001

Citation
A. Alavi-harati et al., First measurement of form factors of the decay Xi(0)->Sigma(+) e(-)(nu)over-bar(e) - art. no. 132001, PHYS REV L, 8713(13), 2001, pp. 2001
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
8713
Issue
13
Year of publication
2001
Database
ISI
SICI code
0031-9007(20010924)8713:13<2001:FMOFFO>2.0.ZU;2-J
Abstract
We present the first measurement of the form factor ratios g(1)/f(1) (direc t axial vector to vector), g(2)/f(1) (second class current), and f(2)/f(1) (weak magnetism) for the decay Xi (o) --> Sigma (+)e(-)<(<nu>)over bar>(e) using the KTeV (E799) beam line and detector at Fermilab. From the Sigma () polarization measured with the decay Sigma (+) --> p pi (o) and the e(-) - <(<nu>)over bar> correlation, we measure g(1)/f(1) to be 1.32 (+0.21)(-0. 17) (stat) +/- 0.05(syst), assuming the SU(3)(f) (flavor) values for g(2)/f (1) and f(2)/f(1). Our results are all consistent with exact SU(3)(f) symme try.