Production of the X(4014) as the Spin-2 Partner of X(3872) in e + e − Collisions

IF 3.5 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Physics Letters Pub Date : 2024-03-01 DOI:10.1088/0256-307x/41/3/031301

Pan-Pan Shi, Vadim Baru, Feng-Kun Guo, Christoph Hanhart, Alexey Nefediev

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引用次数: 0

Abstract

In 2021, the Belle collaboration reported the first observation of a new structure in the ψ(2S)γ final state produced in the two-photon fusion process. In the hadronic molecule picture, this new structure can be associated with the shallow isoscalar

D*D¯*

bound state and as such is an excellent candidate for the spin-2 partner of the X(3872) with the quantum numbers J ^PC = 2⁺⁺ conventionally named X ₂. In this work we evaluate the electronic width of this new state and argue that its nature is sensitive to its total width, the experimental measurement currently available being unable to distinguish between different options. Our estimates demonstrate that the planned Super τ-Charm Facility offers a promising opportunity to search for and study this new state in the invariant mass distributions for the final states J/ψγ and ψ(2S)γ.

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在 e + e - 碰撞中产生作为 X(3872) 自旋-2 伙伴的 X(4014)

2021年，"贝勒 "合作小组首次观测到双光子聚变过程中产生的ψ(2S)γ终态的新结构。在强子分子图中，这种新结构可以与浅等标D*D¯*束缚态相关联，因此是量子数为JPC = 2++的X(3872)自旋-2伙伴的极佳候选者，X(3872)自旋-2伙伴通常被命名为X2。在这项工作中，我们评估了这种新状态的电子宽度，并认为它的性质对其总宽度很敏感，而目前可用的实验测量无法区分不同的选择。我们的估计结果表明，计划中的超τ-粲设施为在最终态J/ψγ和ψ(2S)γ的不变质量分布中寻找和研究这一新态提供了一个大有可为的机会。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chinese Physics Letters 物理-物理：综合

CiteScore

5.90

自引率

8.60%

发文量

13238

审稿时长

4 months

期刊介绍： Chinese Physics Letters provides rapid publication of short reports and important research in all fields of physics and is published by the Chinese Physical Society and hosted online by IOP Publishing.