Published March 2013
| Version v1
Journal article
On the ΣN cusp in the pp → pK+Λ reaction
Creators
- Abd El-Samad, S.1
- Borodina, E.2, 3
- Dzhygadlo, R.2, 3
- Gast, W.2, 3
- Gillitzer, A.2, 3
- Grzonka, D.2, 3
- Kilian, K.2, 3
- Ritman, J.2, 3
- Roderburg, E.2, 3
- Roeder, M.2, 3
- Sefzick, T.2, 3
- Wintz, P.2, 3
- Brinkmann, K.T.4
- Clement, H.5, 6
- Doroshkevich, E.5, 6
- Ehrhardt, K.5, 6
- Erhardt, A.5, 6
- Wagner, G.J.5, 6
- Eyrich, W.7
- Krapp, M.7
- Schulte-Wissermann, M.7
- Freiesleben, H.8
- Hanhart, C.9, 2, 3
- Hauenstein, F.7, 2, 3
- Klaja, P.7, 2, 3
- Schroeder, W.7, 2, 3
- Wuestner, P.10, 2, 3
- COSY-TOF Collaboration
- 1. Atomic Energy Authority NRC Cairo, Cairo (Egypt)
- 2. Forschungszentrum Juelich, Juelich Center for Hadron Physics, Juelich (Germany)
- 3. Forschungszentrum Juelich, Institut fuer Kernphysik, Juelich (Germany)
- 4. Physikalisches Institut Justus-Liebig-Universitaet, Giessen (Germany)
- 5. University of Tuebingen, Kepler Center for Astro and Particle Physics, Tuebingen (Germany)
- 6. Physikalisches Institut der Universitaet Tuebingen, Tuebingen (Germany)
- 7. Friedrich-Alexander-Universitaet Erlangen-Nuernberg, Erlangen (Germany)
- 8. Technische Universitaet Dresden, Institut fuer Kern- und Teilchenphysik, Dresden (Germany)
- 9. Forschungszentrum Juelich, Institute for Advanced Simulation, Juelich (Germany)
- 10. Forschungszentrum Juelich, Zentralinstitut fuer Elektronik, Juelich (Germany)
Description
Measurements of the pp → pK + Λ reaction at Tp = 2.28 GeV have been carried out at COSY-TOF. In addition to the Λp FSI and N * resonance excitation effects a pronounced narrow structure is observed in the Dalitz plot and in its projection on the p Λ invariant mass. The strongly asymmetric structure appears at the pp → NK + Σ threshold and is interpreted as the ΣN cusp effect. The observed width of about 20 MeV/c 2 is substantially broader than anticipated from previous measurements as well as theoretical predictions. Angular distributions of this cusp structure are shown to be dissimilar to those in the residual pK + Λ channel, but similar to those observed in the pK + Σ 0 channel. (orig.)
Availability note (English)
Available from: http://dx.doi.org/10.1140/epja/i2013-13041-8Additional details
Identifiers
Publishing Information
- Journal Title
- European Physical Journal. A
- Journal Volume
- 49
- Journal Issue
- 3
- Journal Page Range
- p. 1-8
- ISSN
- 1434-6001
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 44069446
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ANGULAR DISTRIBUTION; DALITZ PLOT; DIBARYONS; DIFFERENTIAL CROSS SECTIONS; EFFECTIVE MASS; EXPERIMENTAL DATA; GEV RANGE 01-10; HADRONIC PARTICLE DECAY; KAONS PLUS; LAMBDA PARTICLES; MASS SPECTRA; N-1650 BARYONS; N-1710 BARYONS; N-1720 BARYONS; PARTICLE PRODUCTION; PARTICLE WIDTHS; PROTON-PROTON INTERACTIONS; PROTONS; RESONANCE PARTICLES; REST MASS
- Descriptors DEC
- BARYON-BARYON INTERACTIONS; BARYONS; BOSONS; CROSS SECTIONS; DATA; DECAY; DIAGRAMS; DISTRIBUTION; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; HADRON-HADRON INTERACTIONS; HADRONS; HYPERONS; INFORMATION; INTERACTIONS; KAONS; LAMBDA BARYONS; MASS; MESONS; N BARYONS; N*BARYONS; NUCLEON-NUCLEON INTERACTIONS; NUCLEONS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; PROTON-NUCLEON INTERACTIONS; PSEUDOSCALAR MESONS; SCATTERPLOTS; SPECTRA; STRANGE MESONS; STRANGE PARTICLES
Optional Information
- Collaborations
- COSY-TOF Collaboration