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Abstract

We report on the observation of a KSp resonance signal at a mass of 1765 ± 5 MeV/c2, with intrinsic width Γ = 108 ± 22 MeV/c2, produced inclusively in Σ--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-xF), reaching BR(X→KSp)dσ/dxF=(5.2±2.3)μb 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 Σ*+ state. No corresponding peaks were observed in the K-p and Λπ± mass spectra.

Details

Title
Observation of a resonance in the KSp decay channel at a mass of 1765 MeV/c2
Author
Adamovich MI 1 ; Alexandrov YA 1 ; Baranov, S P 1 ; Barberis, D 2 ; Beck, M 3 ; Bérat, C 4 ; Beusch, W 5 ; Boss, M 6 ; Brons, S 7 ; Brückner, W 3 ; Buénerd, M 4 ; Busch, C 6 ; Büscher, C 3 ; Charignon, F 4 ; Chauvin, J 4 ; Chudakov, E A 8 ; Dersch, U 3 ; Dropmann, F 3 ; Engelfried, J 9 ; Faller, F 10 ; Fournier, A 4 ; Gerassimov, S G 11 ; Godbersen, M 3 ; Grafström, P 5 ; Haller, T 3 ; Heidrich, M 3 ; Hubbard, E 3 ; Hurst, R B 2 ; Königsmann, K 12 ; Konorov, I 11 ; Keller, N 6 ; Martens, K 13 ; Martin, P 4 ; Masciocchi, S 14 ; Michaels, R 15 ; Müller, U 16 ; Neeb, H 3 ; Newbold, D 17 ; Newsom, C 18 ; Paul, S 19 ; Pochodzalla, J 20 ; Potashnikova, I 3 ; Povh, B 3 ; Ren, Z 3 ; Rey-Campagnolle, M 4 ; Rosner, G 21 ; Rossi, L 2 ; Rudolph, H 16 ; Scheel, C 22 ; Schmitt, L 23 ; H-W, Siebert 24 ; Simon, A 25 ; Smith, V 17 ; Thilmann, O 6 ; Trombini, A 3 ; Vesin, E 4 ; Volkemer, B 16 ; Vorwalter, K 3 ; Walcher, T 16 ; Wälder, G 6 ; Werding, R 3 ; Wittmann, E 3 ; Zavertyaev, M V 1 

 Moscow Lebedev Physics Institute, Moscow, Russia (GRID:grid.425806.d) (ISNI:0000000106566476) 
 Dipartimento di Fisica and I.N.F.N, Sezione di Genova, Genova, Italy (GRID:grid.470205.4) 
 Max-Planck-Institut für Kernphysik Heidelberg, Heidelberg, Germany (GRID:grid.419604.e) (ISNI:0000000122886103) 
 Université de Grenoble, Institut des Sciences Nucléaires, Grenoble Cedex, France (GRID:grid.450307.5) 
 CERN, Genève 23, Switzerland (GRID:grid.9132.9) (ISNI:0000000095478293) 
 Universität Heidelberg, Physikalisches Institut, Heidelberg, Germany (GRID:grid.7700.0) (ISNI:0000000121904373) 
 Max-Planck-Institut für Kernphysik Heidelberg, Heidelberg, Germany (GRID:grid.419604.e) (ISNI:0000000122886103); TRIUMF, Vancouver, Canada (GRID:grid.232474.4) (ISNI:0000000107059791) 
 Universität Heidelberg, Physikalisches Institut, Heidelberg, Germany (GRID:grid.7700.0) (ISNI:0000000121904373); Thomas Jefferson Lab, Newport News, USA (GRID:grid.450315.6) (ISNI:0000000122361964) 
 Universität Heidelberg, Physikalisches Institut, Heidelberg, Germany (GRID:grid.7700.0) (ISNI:0000000121904373); Universidad Autonoma de San Luis Potosi, Instituto de Fisica, San Luis Potosi, Mexico (GRID:grid.412862.b) (ISNI:000000012191239X) 
10  Universität Heidelberg, Physikalisches Institut, Heidelberg, Germany (GRID:grid.7700.0) (ISNI:0000000121904373); Fraunhofer Institut für Solare Energiesysteme, Freiburg, Germany (GRID:grid.434479.9) (ISNI:0000000106015703) 
11  Moscow Lebedev Physics Institute, Moscow, Russia (GRID:grid.425806.d) (ISNI:0000000106566476); Max-Planck-Institut für Kernphysik Heidelberg, Heidelberg, Germany (GRID:grid.419604.e) (ISNI:0000000122886103); Technische Universität München, Physik Department E18, Garching, Germany (GRID:grid.6936.a) (ISNI:0000000123222966) 
12  Max-Planck-Institut für Kernphysik Heidelberg, Heidelberg, Germany (GRID:grid.419604.e) (ISNI:0000000122886103); Universität Freiburg, Fakultät für Physik, Freiburg, Germany (GRID:grid.5963.9) 
13  Universität Heidelberg, Physikalisches Institut, Heidelberg, Germany (GRID:grid.7700.0) (ISNI:0000000121904373); University of Utah, Department of Physics, Salt Lake City, USA (GRID:grid.223827.e) (ISNI:0000000121930096) 
14  Max-Planck-Institut für Kernphysik Heidelberg, Heidelberg, Germany (GRID:grid.419604.e) (ISNI:0000000122886103); Gesellschaft für Schwerionenforschung, Darmstadt, Germany (GRID:grid.159791.2) (ISNI:0000000091274365) 
15  Max-Planck-Institut für Kernphysik Heidelberg, Heidelberg, Germany (GRID:grid.419604.e) (ISNI:0000000122886103); Thomas Jefferson Lab, Newport News, USA (GRID:grid.450315.6) (ISNI:0000000122361964) 
16  Johannes Gutenberg-Universität Mainz, Institut für Kernphysik, Mainz, Germany (GRID:grid.5802.f) (ISNI:0000000119417111) 
17  University of Bristol, Bristol, UK (GRID:grid.5337.2) (ISNI:0000000419367603) 
18  University of Iowa, Iowa City, USA (GRID:grid.214572.7) (ISNI:0000000419368294) 
19  Max-Planck-Institut für Kernphysik Heidelberg, Heidelberg, Germany (GRID:grid.419604.e) (ISNI:0000000122886103); Technische Universität München, Physik Department E18, Garching, Germany (GRID:grid.6936.a) (ISNI:0000000123222966) 
20  Max-Planck-Institut für Kernphysik Heidelberg, Heidelberg, Germany (GRID:grid.419604.e) (ISNI:0000000122886103); Johannes Gutenberg-Universität Mainz, Institut für Kernphysik, Mainz, Germany (GRID:grid.5802.f) (ISNI:0000000119417111) 
21  Johannes Gutenberg-Universität Mainz, Institut für Kernphysik, Mainz, Germany (GRID:grid.5802.f) (ISNI:0000000119417111); University of Glasgow, Department of Physics and Astronomy, Glasgow, UK (GRID:grid.8756.c) (ISNI:000000012193314X) 
22  NIKHEF, Amsterdam, The Netherlands (GRID:grid.420012.5) (ISNI:0000000406462193) 
23  Johannes Gutenberg-Universität Mainz, Institut für Kernphysik, Mainz, Germany (GRID:grid.5802.f) (ISNI:0000000119417111); Gesellschaft für Schwerionenforschung, Darmstadt, Germany (GRID:grid.159791.2) (ISNI:0000000091274365) 
24  Universität Heidelberg, Physikalisches Institut, Heidelberg, Germany (GRID:grid.7700.0) (ISNI:0000000121904373); Johannes Gutenberg-Universität Mainz, Institut für Kernphysik, Mainz, Germany (GRID:grid.5802.f) (ISNI:0000000119417111) 
25  Universität Heidelberg, Physikalisches Institut, Heidelberg, Germany (GRID:grid.7700.0) (ISNI:0000000121904373); Universität Freiburg, Fakultät für Physik, Freiburg, Germany (GRID:grid.5963.9) 
Publication year
2007
Publication date
Apr 2007
Publisher
Springer Nature B.V.
ISSN
14346044
e-ISSN
14346052
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2293805878
Copyright
© Springer-Verlag Berlin Heidelberg 2007.