Photoproduction of the f_{2}(1270) Meson Using the CLAS Detector.
Photoproduction of the f_{2}(1270) Meson Using the CLAS Detector.
复制标题
使用 CLAS 探测器拍摄 f_{2}(1270) 介子的照片。
DOI：
10.1103/physrevlett.126.082002
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发表时间：
2021
影响因子：
8.6
通讯作者：
Carver M
中科院分区：
文献类型：
--
作者：
Carver M
多年来，介子的夸克结构一直被认为是一种具有量子数的纯夸克-反夸克（）共振。最近，有人提出这是一种由两个介子相互吸引作用形成的分子态。这样的状态将被期望强烈地衰变到由于主导衰变而具有带电π介子的最终状态，而衰变到两个中性π介子可能会被抑制。在这里，我们第一次测量的反应，使用CEBAF大型验收光谱仪探测器在杰斐逊实验室的入射束能量在3.6和5.4 GeV之间。微分截面，，forphotoreproduction提取具有良好的精度，由于低背景，并进行了比较，理论计算。
The quark structure of themeson has, for many years, been assumed to be a pure quark-antiquark () resonance with quantum numbers. Recently, it was proposed that theis a molecular state made from the attractive interaction of twomesons. Such a state would be expected to decay strongly to final states with charged pions due to the dominant decay, whereas decay to two neutral pions would likely be suppressed. Here, we measure for the first time the reaction, using the CEBAF Large Acceptance Spectrometer detector at Jefferson Lab for incident beam energies between 3.6 and 5.4 GeV. Differential cross sections,, forphotoproduction are extracted with good precision due to low backgrounds and are compared to theoretical calculations.