K0πand K*0Σ+ photoproduction off the proton
K0πand K*0Σ+ photoproduction off the proton
复制标题
K0π 和 K*0Σ+ 质子光产生
DOI：
10.1140/epja/i2007-10552-9
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
E. al.
中科院分区：
文献类型：
--
作者：
T. C. C. M. Nanova;E. al.
用标记光子束测量了导致p4 π0终态的排斥反应γp → K*0 π +（1189）和γp → K 0 π0 π +（1189），入射能量从阈值到2.5GeV。实验在艾尔莎加速器（波恩）的标记光子设施进行。晶体管和TAPS探测器组合成几乎4π几何接受度的光子探测器系统。微分和总截面的报告。在接近阈值的能量下，反应γp → K 0 π0 π +的角分布是平坦的，表明主要的s -通道产生。我们观察到了π *（1385）和更高的超子态。反应γp → K*0 → +的角分布在正向方向上的增强表明t通道交换对反应机理的贡献。实验数据与最近的理论预测是在合理的协议。
Abstract.The exclusive reactions γp → K*0Σ+(1189) and γp → K0π0Σ+(1189) , leading to the p 4π0 final state, have been measured with a tagged photon beam for incident energies from threshold up to 2.5GeV. The experiment has been performed at the tagged photon facility of the ELSA accelerator (Bonn). The Crystal Barrel and TAPS detectors were combined to a photon detector system of almost 4π geometrical acceptance. Differential and total cross-sections are reported. At energies close to the threshold, a flat angular distribution has been observed for the reaction γp → K0π0Σ+ suggesting dominant s -channel production. Σ*(1385) and higher-lying hyperon states have been observed. An enhancement in the forward direction in the angular distributions of the reaction γp → K*0Σ+ indicates a t -channel exchange contribution to the reaction mechanism. The experimental data are in reasonable agreement with recent theoretical predictions.
DOI：
10.1140/epja/i2007-10447-9
发表时间：
2007
期刊：
The European Physical Journal A
影响因子：
--
作者：
D. Elsner [CBELSA;TAPS Collaboration]
通讯作者：
TAPS Collaboration]