Photoproduction of ρmesons and Δ-baryons in the reaction γp → pπ+π- at energies up to $ sqrt{{s}}$ = 2.6 GeV
Photoproduction of ρmesons and Δ-baryons in the reaction γp → pπ+π- at energies up to $ sqrt{{s}}$ = 2.6 GeV
复制标题
γp → pπ+π- 反应中 ρ 介子和 Δ-重子的光产生，能量高达 $ sqrt{{s}}$ = 2.6 GeV
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
J. Wisskirchen
中科院分区：
文献类型：
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作者：
C. Wu;J. Barth;W. Braun;J. Ernst;K. Glander;J. Hannappel;N. Jöpen;H. Kalinowsky;F. Klein;F. Klein;E. Klempt;R. Lawall;J. Link;D. Menze;W. Neuerburg;M. Ostrick;E. Paul;H. van Pee;I. Schulday;W. Schwille;B. Wiegers;F. W. Wieland;J. Wisskirchen
Abstract.The photoproduction of ρ0-mesons and Δ-baryons at photon energies up to 2.6 GeV has been studied with the SAPHIR detector at the electron stretcher ELSA. Total and differential cross-sections were obtained. The decay angular distributions of ρ0-mesons show that s-channel helicity conservation, which is valid at high photon energies, is broken near threshold. The energy dependencies of the decay angular distributions in the helicity system as well as in the Gottfried-Jackson system hint at small s- or u-channel resonance contributions. For the reactions γp → Δ{++}π- and γp → Δ0π+ new data on cross-sections are presented.
