Producing fully charm structures in the J/ψ-pair invariant mass spectrum

Jun-Zhang Wang; Dian-Yong Chen; Xiang Liu; Takayuki Matsuki

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Producing fully charm structures in the J/ψ-pair invariant mass spectrum

机译：在J /ψ对不变质量谱中产生完全魅力结构

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Focusing on the novel phenomenon of several enhancement structures existing in the invariant mass spectrum of a J / ψ pair, which was reported by LHCb very recently, we find a new dynamical mechanism based on the special reactions, where all the possible combinations of a double charmonium directly produced by a proton-proton collision are transitioned into final-state J / ψ J / ψ . Under this framework, totally different from the popular tetraquark explanation, the LHCb experimental data of the line shape of the J / ψ -pair invariant mass spectrum can be well mimicked. Since the proposed dynamical mechanism is universal enough, we further predict the possible enhancement structures existing in the ? ( 1 S ) -pair invariant mass spectrum, which may provide a realistic approach to test the new mechanism proposed in this work and form a new task for the LHCb and CMS experiments.

机译：专注于在最近的LHCB报告的j /ψ对的不变质谱中存在的几种增强结构的新颖现象，我们发现了一种基于特殊反应的新型动态机制，其中所有可能的组合通过质子 - 质子碰撞直接产生的越野仙花转变为最终状态J /ψJ/ψ。在此框架下，与流行的Tetraquark解释完全不同，LHCB实验数据的轴形形状的J /ψ-PAIR不变质谱可以很好地模仿。由于所提出的动态机制是足够的，我们进一步预测了存在的可能增强结构？（1 s）-pair不变质谱，这可能提供一种测试本工作中提出的新机制的现实方法，并为LHCB和CMS实验形成新任务。

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《Physical review, D》 |2021年第7期|共8页
作者
Jun-Zhang Wang; Dian-Yong Chen; Xiang Liu; Takayuki Matsuki;
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2. TESTING THE PREDICTED DYNAMICALLY GENERATED HIDDEN CHARM SCALAR X STATE THROUGH THE RADIATIVE DECAY OF THE ψ(3770) AND THE DD INVARIANT MASS SPECTRUM [J] . Daniel Gamermann, Eulogio Oset, Bing Song Zou Acta physica Polonica . 2009,第2期

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3. Pair invariant mass spectrum and polarization asymmetry in the event generation of gamma-ray conversions [J] . D. Bernard Nuclear Instruments & Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment . 2021,第MAYa1期

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4. Azimuthal correlation of charm quark pair produced in heavy ion collision [C] . Mohammed Younus, Dinesh K. Srivastava Conference on Strangeness in Quark Matter . 2014

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5. Measurement of the Transverse Single Spin Asymmetry and the Invariant Cross Section of Inclusive Eta Mesons Produced from Transversely Polarized Proton-Proton Collisions at Center of Mass Energy of 200 GeV. [D] . Kleinjan, David William. 2014

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Producing fully charm structures in the J/ψ-pair invariant mass spectrum

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