First observation of Sigma(-)-e(-) elastic scattering in the hyperon beam experiment WA89 at CERN

Citation
Mi. Adamovich et al., First observation of Sigma(-)-e(-) elastic scattering in the hyperon beam experiment WA89 at CERN, EUR PHY J C, 8(1), 1999, pp. 59-66
Citations number
27
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL C
ISSN journal
1434-6044 → ACNP
Volume
8
Issue
1
Year of publication
1999
Pages
59 - 66
Database
ISI
SICI code
1434-6044(199904)8:1<59:FOOSES>2.0.ZU;2-N
Abstract
We have investigated the elastic scattering of high energy Sigma(-) off ele ctrons from carbon and copper targets using the CERN hyperon beam. Scatteri ng events are identified using a maximum likelihood technique exploring the kinematical relations of the scattered particles. The observed Q(2)-distri bution of these events suggests a mean square charge radius of the Sigma(-) of < r(ch)(2) > (Sigma(-)) = 0.91 +/- 0.32(stat.) +/- 0.4 (syst.) fm(2). T his constitutes the first measurement of < r(ch)(2) > (Sigma(-)) and demons trates the possibility to also measure the charge radii of other hyperons.