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.

引用

页数：10

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