Formation of a narrow baryon resonance with positive strangeness in [K.sup.+] collisions with Xe nuclei

The data on the charge-exchange reaction [K.sup.+]Xe → [K.sub.0]pXe', obtained with the bubble chamber DIANA, are reanalyzed using increased statistics and updated selections. Our previous evidence for formation of a narrow p[K.sup.0] resonance with mass near 1538 MeV is confirmed. The statisti...

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Published in:Physics of atomic nuclei 2010-07, Vol.73 (7), p.1168
Main Authors: Barmin, V.V, Asratyan, A.E, Borisov, V.S, Curceanu, C, Davidenko, G.V, Dolgolenko, A.G, Guaraldo, C, Kubantsev, M.A, Larin, I.F, Matveev, V.A, Shebanov, V.A, Shishov, N.N, Sokolov, L.I, Tumanov, G.K, Verebryusov, V.S
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Collisions (Nuclear physics)
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container_issue 7
container_start_page 1168
container_title Physics of atomic nuclei
container_volume 73
creator Barmin, V.V
Asratyan, A.E
Borisov, V.S
Curceanu, C
Davidenko, G.V
Dolgolenko, A.G
Guaraldo, C
Kubantsev, M.A
Larin, I.F
Matveev, V.A
Shebanov, V.A
Shishov, N.N
Sokolov, L.I
Tumanov, G.K
Verebryusov, V.S
description The data on the charge-exchange reaction [K.sup.+]Xe → [K.sub.0]pXe', obtained with the bubble chamber DIANA, are reanalyzed using increased statistics and updated selections. Our previous evidence for formation of a narrow p[K.sup.0] resonance with mass near 1538 MeV is confirmed. The statistical significance of the signal reaches some 8 (6) standard deviations when estimated as S/[square root of B] (S/[square root of (B + S)]). The mass and intrinsic width of the [ϴ.sup.+] baryon are measured as m = 1538 ± 2 MeV and Γ = 0.39 ± 0.10 MeV
doi_str_mv 10.1134/S1063778810070100
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title Formation of a narrow baryon resonance with positive strangeness in [K.sup.+] collisions with Xe nuclei
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