First observation of [sigma]- -e- elastic scattering in the hyperon beam experiment WA89 at CERN
We have investigated the elastic scattering of high energy Σ−Σ−\Sigma^- off electrons from carbon and copper targets using the CERN hyperon beam. Scattering events are identified using a maximum likelihood technique exploring the kinematical relations of the scattered particles. The observed Q22^2-d...
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
1 March 1999
|
| In: |
The European physical journal. C, Particles and fields
Year: 1999, Jahrgang: 8, Heft: 1, Pages: 59-66 |
| ISSN: | 1434-6052 |
| DOI: | 10.1007/s100529901103 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1007/s100529901103 Verlag, kostenfrei, Volltext: https://link.springer.com/article/10.1007/s100529901103 |
| Verfasserangaben: | the WA89 Collaboration: M.I. Adamovich, Yu.A. Alexandrov, D. Barberis, M. Beck, C.Berat, W. Beusch, M. Boss, S. Brons, W.Brückner, M.Buenerd, C. Busch, C.Büscher, F. Charignon, J. Chauvin, E.A. Chudakov, U. Dersch, F. Dropmann, J. Engelfried, F. Faller, A. Fournier, S.G. Gerassimov, M. Godbersen, P. Grafström, Th. Haller, M. Heidrich, E. Hubbard, R.B. Hurst, K. Königsmann, I. Konorov, N. Keller,K. Martens, Ph. Martin, S. Masciocchi, R. Michaels, R. Müller, H. Neeb, D. Newbold, C. Newsom, S. Paul, J. Pochodzalla, I. Potashnikova, B.Povh, R.D. Ransome, Z.Ren, M. Rey-Campagnolle, G. Rosner, L. Rossi, H. Rudolph, C. Scheel, L. Schmitt, H.-W. Siebert, A. Simon, V.J. Smith, O. Thilmann, A. Trombini, E. Vesin, B. Volkemer, K. Vorwalter, Th. Walcher, G. Wälder, R. Werding, E.Wittmann, M.V. Zavertyaev |
| Zusammenfassung: | We have investigated the elastic scattering of high energy Σ−Σ−\Sigma^- off electrons from carbon and copper targets using the CERN hyperon beam. Scattering events are identified using a maximum likelihood technique exploring the kinematical relations of the scattered particles. The observed Q22^2-distribution of these events suggests a mean square charge radius of the Σ−Σ−\Sigma^- of <r2ch>(Σ−)=0.91±0.32(stat.)±0.4<rch2>(Σ−)=0.91±0.32(stat.)±0.4 < r^2_{ch}>(\Sigma^-) = 0.91 \pm 0.32 (stat.) \pm 0.4 (syst.) fm22^2. This constitutes the first measurement of <r2ch>(Σ−)<rch2>(Σ−) < r^2_{ch}>(\Sigma^-) and demonstrates the possibility to also measure the charge radii of other hyperons. |
|---|---|
| Beschreibung: | Im Titel wird Sigma als griechischer Buchstabe dargestellt Im Titel sind die Minuszeichen nach Sigma und e hochgestellt Gesehen am 27.02.2020 |
| Beschreibung: | Online Resource |
| ISSN: | 1434-6052 |
| DOI: | 10.1007/s100529901103 |