2007
Journal Article
Title

Observation of a resonance in the KSp decay channel at a mass of 1765MeV/c2

Abstract
We report on the observation of a KSp resonance signal at a mass of 1765 ± 5 MeV/c 2, with intrinsic width = 108 ± 22 MeV/c 2, produced inclusively in -- nucleus interactions at 340 GeV/c in the hyperon beam experiment WA89 at CERN. The signal was observed in the kinematic region xF>0.7, in this region its production cross section rises approximately linearly with (1-x F), reaching BR(XKSp)d/dxF=(5. 2±2.3)b per nucleon at xF=0.8. The hard xF spectrum suggests the presence of a strong leading particle effect in the production and hence the identification as a *+ state. No corresponding peaks were observed in the K-p and ± mass spectra.
Author(s)
Adamovich, M.I.
Alexandrov, Y.A.
Baranov, S.P.
Barberis, D.
Beck, M.
Bérat, C.
Beusch, W.
Boss, M.
Brons, S.
Brückner, W.
Buénerd, M.
Busch, C.
Büscher, C.
Charignon, F.
Chauvin, J.
Chudakov, E.A.
Dersch, U.
Dropmann, F.
Engelfried, J.
Faller, F.
Fournier, A.
Gerassimov, S.G.
Godbersen, M.
Grafström, P.
Haller, T.
Heidrich, M.
Hubbard, E.
Hurst, R.B.
Königsmann, K.
Konorov, I.
Keller, N.
Martens, K.
Martin, P.
Masciocchi, S.
Michaels, R.
Müller, U.
Neeb, H.
Newbold, D.
Newsom, C.
Paul, S.
Pochodzalla, J.
Potashnikova, I.
Povh, B.
Ren, Z.
Rey-Campagnolle, M.
Rosner, G.
Rossi, L.
Rudolph, H.
Scheel, C.
Schmitt, L.
Siebert, H.-W.
Simon, A.
Smith, V.
Thilmann, O.
Trombini, A.
Vesin, E.
Volkemer, B.
Vorwalter, K.
Walcher, T.
Wälder, G.
Werding, R.
Wittmann, E.
Zavertyaev, M.V.
Journal
Open Access
DOI
Additional link
Language
English