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.
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页数：3
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