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Your search keyword '"associated production [K0]"' showing total 2 results
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2 results on '"associated production [K0]"'

1. Investigation of the reaction pp → pK0π+Λ in search of the pentaquark

Author

Markus Büscher, H. Ströher, I. Keshelashvili, Yu. Valdau, M. Hartmann, V. Kleber, S. Mikirtychiants, R. Schleichert, A. Sibirtsev, M. Nekipelov, Yoshikazu Maeda, and V. Koptev

Subjects
Nuclear and High Energy Physics, Proton, Juelich COSY PS, Strangeness, momentum dependence [channel cross section], hadroproduction [Theta(1540)], ddc:530, Nuclear Experiment, exclusive reaction [p p], Physics, experimental results [magnetic spectrometer], hadroproduction [Lambda], associated production [pi+], missing-mass [mass spectrum], Strangeness production, 3.65 GeV/c, associated production [K0], +Lambda+p+K0+pi%2B%22">p p --> Lambda p K0 pi+, Pentaquark, Charged particle, search for [pentaquark], Exotic baryon, Mass spectrum, Atomic physics, intermediate state [Delta(1232)++], upper limit, Excitation
Abstract

The reaction pp->p K0 pi+ Lambda has been studied with the ANKE spectrometer at COSY-Juelich at a beam momentum of 3.65 GeV/c in order to search for a possible signal of the pentaquark Theta+(1540), decaying into the p K0 system. By detecting four charged particles in the final state, the K0 and the Lambda have been reconstructed to tag strangeness production. It has been found that the pi+ Lambda missing-mass spectrum displays no significant signal expected from the Theta+(1540) excitation. The total cross section for the reaction pp->p K0 pi+ Lambda has been deduced, as well as an upper limit for the Theta+ production cross section. The intermediate Delta++ K0 Lambda state is found to provide a significant contribution to the reaction., Comment: 10 pages, 7 figures; text changed, references added, style file changed

Published
2007
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2. Evidence for a narrow resonance at 1530 MeV/c2 in the K0 p - System of the reaction pp -> S+ K0 p from the COSY-TOF experiment

Author

Detlef Filges, S. Abdel-Samad, Marc Wagner, E. Roderburg, A. Erhardt, A. Filippi, E. Kuhlmann, P. Wintz, M. Fritsch, Jens-Christoph Georgi, L. Naumann, P. Schönmeier, H. Clement, W. Schroeder, G. Y. Sun, M. Abdel-Bary, W. Eyrich, A. Gillitzer, K.-Th. Brinkmann, S. Wirth, M. Schulte-Wissermann, D. Hesselbarth, N. Paul, E. Doroshkevich, A. Wilms, H. Mörtel, P. Michel, T. Sefzick, S. Marwinski, René Jäkel, K. Möller, H. Koch, K. Kilian, S. Marcello, L. Pinna, H. Freiesleben, C. Pizzolotto, P. Wüstner, M. Richter, R. Meier, A. Ucar, H. P. Morsch, L. Karsch, M. Drochner, J. Kress, G. J. Wagner, F. Stinzing, A. Teufel, B. Jakob, and S. Dshemuchadse

Subjects
hadroproduction [Sigma+], Nuclear and High Energy Physics, Hadron, Strangeness, Juelich COSY PS, hyperon, Resonance (particle physics), High Energy Physics - Experiment, Nuclear physics, hadron physics, Baryons, Glueball and non-standard multi-quark/gluon states, Invariant mass, ddc:530, proton-proton collisions, pentaquark, Nuclear Experiment, Theta(1540), Physics, exclusive reaction [p p], channel cross section, upper limit [width], Nucleon–nucleon interactions, associated production [K0], Pentaquark, other particles, Baryon, (p K0) [mass spectrum], Full width at half maximum, 2.95 GeV/c, glueball and non-standard multi-quark/gluon states, nucleon-nucleon interactions, +Sigma%2B+p+K0%22">p p --> Sigma+ p K0, (1530) [narrow resonance], Other particles, Storage ring, experimental results, baryons
Abstract

The hadronic reaction pp --> Sigma+ K0 p was measured exclusively at a beam momentum of 2.95 GeV/c using the TOF detector at the COSY storage ring. A narrow peak was observed in the invariant mass spectrum of the K0 p subsystem at 1530 +- 5 MeV/c2 with a significance of 4 - 6 standard deviations, depending on background assumptions. The upper limit of 18 +- 4 MeV/c2 (FWHM) for its width is given by the experimental resolution. The corresponding total cross section is estimated to be about 0.4 +- 0.1(stat) +- 0.1(syst) microbarn. Since a resonance in this subsystem must have strangeness S = + 1 we claim it to be the Theta+ state for which very recently evidence was found in various experiments., Comment: 11 pages, 7 figures

Published
2004
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