(J/ψ,J/ψ), and (ηc,ηc) production through two intermediate photons in electron-positron annihilation at B-factories

IF 1.7 4区 物理与天体物理 Q2 PHYSICS, NUCLEAR Nuclear Physics A Pub Date : 2024-10-15 DOI:10.1016/j.nuclphysa.2024.122969
Shashank Bhatnagar , Hluf Negash
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引用次数: 0

Abstract

We study the processes, ee+γγJ/ψ+J/ψ, and ee+γγηc+ηc at s=10.6 GeV in the framework of 4×4 Bethe-Salpeter equation. For J/ψ+J/ψ production, the dominant contribution is through fragmentation process, while for ηc+ηc production, the quark rearrangement diagrams contribute. Our results of cross section for J/ψ+J/ψ and ψ(2S)+ψ(2S) are compatible with the experimental upper limits set by Belle Collaboration, while in the absence of experimental data for ηc(1S)+ηc(1S), and ηc(2S)+ηc(2S) production, we have given theoretical prediction of their cross sections, and compared with NRQCD prediction.
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(J/ψ,J/ψ)和(ηc,ηc)在 B 工厂的电子-正电子湮灭中通过两个中间光子产生
我们在 4×4 贝特-萨尔佩特方程的框架内研究了 s=10.6 GeV 时的 e-e+→γ⁎γ⁎→J/ψ+J/ψ 和 e-e+→γ⁎γ⁎→ηc+ηc 过程。对于J/ψ+J/ψ的产生,最主要的贡献是碎片过程,而对于ηc+ηc的产生,夸克重排图做出了贡献。我们关于J/ψ+J/ψ和ψ(2S)+ψ(2S)产生的截面结果与贝勒合作组设定的实验上限相一致,而在ηc(1S)+ηc(1S)和ηc(2S)+ηc(2S)产生的实验数据缺失的情况下,我们给出了它们的理论预测截面,并与NRQCD预测进行了比较。
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来源期刊
Nuclear Physics A
Nuclear Physics A 物理-物理:核物理
CiteScore
3.60
自引率
7.10%
发文量
113
审稿时长
61 days
期刊介绍: Nuclear Physics A focuses on the domain of nuclear and hadronic physics and includes the following subsections: Nuclear Structure and Dynamics; Intermediate and High Energy Heavy Ion Physics; Hadronic Physics; Electromagnetic and Weak Interactions; Nuclear Astrophysics. The emphasis is on original research papers. A number of carefully selected and reviewed conference proceedings are published as an integral part of the journal.
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Editorial Board Triaxial shape evolution and shape coexistence in Radon isotopes within the covariant density functional theory Advanced predictive modelling of electric quadrupole transitions in even-even nuclei using various machine learning approaches Editorial Board Investigation of ground state and the β-decay properties of 156−162Nd
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