The Search for a π1(1400) Exotic Meson in the γp → Δ++ηπ- System with CLAS

被引：2
|
作者：
Schott, Diane [1 ]
机构：
[1] Florida Int Univ, Miami, FL 33199 USA
来源：
HADRON 2009 | 2010年 / 1257卷
关键词：
photoproduction; exotic meson; CLAS;
D O I：
10.1063/1.3483378
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Several experiments have reported evidence for the pi(1)(1400) using pion production but the results have been controversial and its existence has yet to be seen in photoproduction. Theoretical works have implied that the production amplitude will be greatly increased in photoproduction in comparison to the pion production. The reaction gamma p -> Delta X++ -> p pi(+)pi(-)(eta) is being studied in the photon energy range 4.4 to 5.4 GeV as a possible method of producing the pi(1)(1400) resonance. Data were collected at Jefferson Lab in Hall B. This reaction is being investigated by detecting the p pi(+)pi(-)2 gamma and reconstructing the eta through the missing-mass of the p pi(+)pi(-), and comparing the results to the 2 gamma composite. These data have yielded a(0)(980) and a(2)(1320) in the pi(-)eta invariant mass spectrum. Further analysis is needed to untangle the possible pi(1)(1400) resonance from the a(2)(1320).
引用
收藏
页码：492 / 495
页数：4
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