a+0 (980)-resonance production in pp-->dK+K-0 reactions close to threshold.
The reaction pp-->dK+K(-)0 has been investigated at an excess energy of Q=46 MeV above the K+K(-)0 threshold with ANKE at the cooler synchrotron COSY-Jülich. From the detected coincident dK(+) pairs, about 1000 events with a missing K(-)0 were identified, corresponding to a total cross section of sigma(pp-->dK+K(-)0)=[38+/-2(stat)+/-14(syst)] nb. Invariant-mass and angular distributions have been jointly analyzed and reveal s-wave dominance between the two kaons, accompanied by a p wave between the deuteron and the kaon system. This is interpreted in terms of a(+)0 (980)-resonance production.
Kleber
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V
Institut für Kernphysik, Forschungszentrum Jülich, 52425 Jülich, Germany. v.kleber@fz-juelich.de
Büscher
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Chernyshev
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Dymov
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Fedorets
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Grishina
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Hanhart
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Hartmann
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Hejny
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Khoukaz
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Koch
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Komarov
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Kondratyuk
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Koptev
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Lang
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Merzliakov
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Mikirtychiants
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Nekipelov
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Ohm
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Petrus
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Prasuhn
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Schleichert
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Sibirtsev
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Stein
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Ströher
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Watzlawik
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Wüstner
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Yaschenko
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Zalikhanov
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Zychor
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