Traces of the new α0(1780) resonance in the J/Ψ→φK+ K-(K0 K_0) reaction

被引：5
|
作者：
Abreu, Luciano M. [1 ,2 ]
Wang, Wen-Fei [2 ,3 ]
Oset, Eulogio [2 ]
机构：
[1] Univ Fed Bahia, Inst Fis, Campus Univ Ondina, BR-40170115 Ondina, BA, Brazil
[2] Ctr Mixto Univ Valencia CSIC, Inst Invest Paterna, Dept Fis Teor & IFIC, Apdo 22085, Valencia 46071, Spain
[3] Shanxi Univ, Inst Theoret Phys, Taiyuan, Shanxi, Peoples R China
来源：
EUROPEAN PHYSICAL JOURNAL C | 2023年 / 83卷 / 03期
基金：
欧盟地平线“2020”; 中国国家自然科学基金;
关键词：
EFFECTIVE CHIRAL LAGRANGIANS; QUARK-MODEL; MESON; F(0)(980); F(0)(500); SYMMETRY; CHI(C1); J/PSI;
D O I：
10.1140/epjc/s10052-023-11384-3
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We study the J/Psi ->phi K+ K- decay, looking for differences in the production rates of K+K- or K-0 K-(0) in the region of 1700-1800 MeV, where two resonances appear dynamically generated from the vector-vector interaction. Two resonances are known experimentally in that region, the f(0)(1710) and a new resonance reported by the BABAR and BESIII collaborations. The K K should be produced with I = 0 in that reaction, but due to the different K*(0) and K*(+) masses some isospin violation appears. Yet, due to the large width of the K*, the violation obtained is very small and the rates of K+K- or K-0 K-0 production are equal within 5%. However, we also find that due to the step needed to convert two vectors into K K, a shape can appear in the K K mass distribution that can mimic the a0 production around the K* K* threshold, and is simply a threshold effect.
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页数：11
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