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

Pan-Pan Shi ¹Vadim Baru ²Feng-Kun Guo ³Christoph Hanhart ⁴Alexey Nefediev⁵

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作者信息

1. CAS Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Departamento de Física Teórica and IFIC,Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna,Aptdo.22085,46071 Valencia,Spain
2. Institut für Theoretische Physik Ⅱ,Ruhr-Universität Bochum,D-44780 Bochum,Germany
3. CAS Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Peng Huanwu Collaborative Center for Research and Education,Beihang University,Beijing 100191,China
4. Institute for Advanced Simulation,Institut für Kernphysik and Jülich Center for Hadron Physics,Forschungszentrum Jülich,D-52425 Jülich,Germany
5. Jozef Stefan Institute,Jamova 39,1000,Ljubljana,Slovenia;CeFEMA,Center of Physics and Engineering of Advanced Materials,Instituto Superior Técnico,Avenida Rovisco Pais 1,1049-001 Lisboa,Portugal
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Abstract

In 2021,the Belle collaboration reported the first observation of a new structure in the φ(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 JPC=2++conventionally named X2.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 φ(2S)γ.

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基金项目

国家自然科学基金(12070131001)

国家自然科学基金(12125507)

国家自然科学基金(11835015)

国家自然科学基金(12047503)

Deutsche Forschungsgemeinschaft(DFG)through the funds provided to the Sino-German Collaborative Research Center TRR110(196253076)

中国科学院项目(YSBR-101)

中国科学院项目(XDB34030000)

EU STRONG-2020 project under the program H2020-INFRAIA-2018-1(824093)

Generalitat valenciana(GVA)(CIDEGENT/2019/015)

Slovenian Research Agency(research core Funding P1-0035)

CAS President's International Fellowship Initiative(PIFI)(2024PVA0004)

出版年

2024

中国物理快报(英文版)

中国科学院物理研究所,中国物理学会

中国物理快报(英文版)

CSTPCDEI

影响因子：0.515

ISSN：0256-307X

参考文献量80

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