Multipion and strange-particle photoproduction on protons at energies up to 5.8-GeV
Multipion and strange-particle photoproduction on protons at energies up to 5.8-GeV
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DOI：
10.1103/physrev.188.2060
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发表时间：
1969-12
期刊：
影响因子：
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通讯作者：
R. Erbe;E. Lohrmann;W. Struczinski;H. Meyer;F. Storim;G. Horlitz;N. Schmitz;E. Schuettler;S. Wolff;J. Seyerlein;H. Spitzer;P. Steffen;W. Tejessy;K. Gottstein;H. Schreiber;H. Alvensleben;H. Filthuth;M. Teucher;H. Beisel;K. Lanius;B. Nellen;D. Lüke;H. G. Hilpert;H. Kolar;P. Seyboth;W. Johnssen;W. P. Swanson;J. Moebes;P. Freund;A. Pose;G. Wolf;A. Meyer
中科院分区：
文献类型：
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作者：
R. Erbe;E. Lohrmann;W. Struczinski;H. Meyer;F. Storim;G. Horlitz;N. Schmitz;E. Schuettler;S. Wolff;J. Seyerlein;H. Spitzer;P. Steffen;W. Tejessy;K. Gottstein;H. Schreiber;H. Alvensleben;H. Filthuth;M. Teucher;H. Beisel;K. Lanius;B. Nellen;D. Lüke;H. G. Hilpert;H. Kolar;P. Seyboth;W. Johnssen;W. P. Swanson;J. Moebes;P. Freund;A. Pose;G. Wolf;A. Meyer
在一项氢气泡室中光子能量为 0.3 至 5.8 GeV 的光产生研究中，分析了约 170 万张图片，其中包含约 31 000 个具有三个或更多传出带电粒子的事件。这是有关该实验的两份最终报告中的第二份。给出了反应 γp→N3π、N4π、N5π 的有效质量分布。报告了通过 γp→Δρ、Δ2π、Δ3π、Δ4π、Nπρ 和 N2πρ 以及各种其他反应产生 Δ(1236) 和 ρ 的横截面。从反应 γp→Δ++ρ−，得到 ρ− 的辐射衰变宽度的上限，即 Γ(ρ−→π−γ)<0.24 MeV（90% 置信度）。对于 ρ0 的四π介子衰变模式，找到了 Γ(ρ0→π+π+π−π−)Γ(ρ0→π+π−)<0.0015 的上限（90% 置信度）。讨论了奇异粒子的光产生，并给出了 γp→ΛK+、ΣK、ΛKπ、ΣKπ 和 ΛKππ 的横截面。观察到Σ(1385)的产生。
In a study of photoproduction at photon energies between 0.3 and 5.8 GeV in a hydrogen bubble chamber, approximately 1.7 million pictures containing about 31 000 events with three or more outgoing charged particles were analyzed. This is the second of two final reports on this experiment. Distributions of effective masses are given for the reactions γp→N3π, N4π, N5π. Cross sections for the production of Δ(1236) and ρ via γp→Δρ, Δ2π, Δ3π, Δ4π, Nπρ, and N2πρ and of various other reactions are reported. From the reaction γp→Δ++ρ−, an upper limit for the radiative decay width of ρ−, Γ(ρ−→π−γ)<0.24 MeV, is obtained (90% confidence). For the four-pion decay mode of the ρ0, an upper limit of Γ(ρ0→π+π+π−π−)Γ(ρ0→π+π−)<0.0015 is found (90% confidence). The photoproduction of strange particles is discussed and cross sections for γp→ΛK+, ΣK, ΛKπ, ΣKπ, and ΛKππ are presented. Production of Σ(1385) was observed.