Q 1 production by hypercharge exchange in ?- p interactions at 3.95 GeV/c | Zendy

S. Rodeb�ck | Zendy; I. Sj�gren | Zendy; S.O. Holmgren | Zendy; R. Armenteros | Zendy; C. Dionisi | Zendy; Ph. Gavillet | Zendy; M. J. Losty | Zendy; P.F. Loverre | Zendy; M. Mazzucato | Zendy; L. Dobrzyński | Zendy; D. Pennino | Zendy; M. Aguilar-Benítez | Zendy; C. Fernández | Zendy; J. Ferrando | Zendy; A.L. Fraguas | Zendy; J.A. Rubio | Zendy

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Q 1 production by hypercharge exchange in ?- p interactions at 3.95 GeV/c

Author(s) -

S. Rodeb�ck,

I. Sj�gren,

S.O. Holmgren,

R. Armenteros,

C. Dionisi,

Ph. Gavillet,

M. J. Losty,

P.F. Loverre,

M. Mazzucato,

L. Dobrzyński,

D. Pennino,

M. Aguilar-Benítez,

C. Fernández,

J. Ferrando,

A.L. Fraguas,

J.A. Rubio

Publication year - 1981

Publication title -

zeitschrift für physik c

Language(s) - English

Resource type - Journals

eISSN - 1431-5858

pISSN - 0170-9739

DOI - 10.1007/bf01554104

Subject(s) - physics , hypercharge , dalitz plot , production (economics) , particle physics , meson , nuclear physics , limit (mathematics) , fermion , economics , macroeconomics , mathematical analysis , mathematics

Q-meson production is studied in the hypercharge exchange reaction π-p → (Kππ)Λ at 3.95 GeV/c by selecting events witht(π- →Kππ)>1.2GeV2. An enhancement with a mass of 1294±10 MeV and a width of 66±15 MeV is observed in the (Kππ) mass distribution. A spin-parity analysis of the (Kππ) decay Dalitz plot shows the enhancement to be in theJP=1+S(Kϱ) wave and is therefore attributed toQ1-meson production. No evidence is found for the decayQ1→K0ω but limited statistics allow only placing an upper limit of 30% for the decay ratioKω/Kϱ0. TheQ1 production cross section fort(π- →Kππ)>1.2GeV2 is 8±1.3 μb. No evidence is found for the process π-p→Q2Λ withQ2→K*π for which the partial wave analysis gives an upper cross section limit of 2.5 μb at the 95% confidence level.

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