Invariant-mass spectrum of Λ(Λ)over-bar pair in the process e+ e- → φΛ(Λ)over-bar

被引：7

作者：

Milstein, A. I. ^{[1
,2
]}

Salnikov, S. G. ^{[1
,2
]}

机构：

[1] SB RAS, Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[2] Novosibirsk State Univ, Novosibirsk 630090, Russia

来源：

PHYSICAL REVIEW D | 2022年 / 105卷 / 03期

关键词：

D O I：

10.1103/PhysRevD.105.L031501

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that the final-state interaction perfectly explains the recent experimental data of the BESIII Collaboration on the near-threshold invariant-mass spectrum of Lambda(Lambda) over bar in the process e(+) e(-) -> phi Lambda(Lambda) over bar. The position of the peak in the invariant-mass spectrum is above the threshold, though the interaction of Lambda and (Lambda) over bar is due to an attractive potential. This potential has a simple form and depends only on two parameters. We show that the invariant-mass spectrum is consistent with the quantum numbers J(PC) = 1(++) and 2(++) of Lambda(Lambda) over bar pair but the quantum numbers J(PC) = 2(++) are less likely.

引用

页数：3

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