Role of triangle singularity in the decay process D0 → π+ π- f0 (980), f0 → π+ π-

被引：1
作者：
He, Dazhuang [1 ]
Xie, Yiling [1 ]
Sun, Hao [1 ]
机构：
[1] Dalian Univ Technol, Inst Theoret Phys, Sch Phys, 2 Linggong Rd, Dalian 116024, Liaoning, Peoples R China
来源：
PHYSICAL REVIEW D | 2023年 / 107卷 / 09期
基金：
中国国家自然科学基金;
关键词：
LAMBDA(+)(C); F(0)(500); F(0)(980); MECHANISM; J/PSI; STATE; SIGMA;
D O I：
10.1103/PhysRevD.107.094040
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the process D-0 -> pi(+)-pi(-) f(0)(980), f(0 ->) pi(+) pi(-) by introducing the triangle mechanism, in which f(0)(980) is considered to be dynamically generated from the meson-meson interaction. For the total contribution of this process, the contribution of the triangular loop formed by K*(K) over barK particles could generate a triangular singularity of about 1418 MeV. We calculate the differential decay width of this process and show a narrow peak of about 980 M-eV in the pi(+)-pi(-) invariant mass distribution, which comes from f(0) decay. For the M-inv(pi f(0)) invariant mass distribution, we obtain a finite peak at 1418 MeV, which is consistent with the triangle singularity.
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页数：10
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