Radiative decays of the spin-2 partner of X(3872)

doi:10.1016/j.physletb.2023.137987

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	Radiative decays of the spin-2 partner of X(3872)
	Shi, Pan-Pan ; Dias, Jorgivan M.; Guo, Feng-Kun
刊名	PHYSICS LETTERS B
	2023
卷号	843 页码:137987
关键词	HEAVY-QUARK X 3872 PENTAQUARK DEUTERON PACKAGE
ISSN号	0370-2693
DOI	10.1016/j.physletb.2023.137987
英文摘要	It has been generally expected that the X(3872) has a spin-2 partner, X2, with quantum numbers JPC = 2++. In the hadronic molecular model, its mass was predicted to be below the DD over bar threshold, and the new structure reported in the & gamma; & psi; (2S) invariant mass distribution by the Belle Collaboration with mass M = (4014.3 & PLUSMN;4.0 & PLUSMN; 1.5) MeV and decay width ⠄ = (4 & PLUSMN; 11 & PLUSMN; 6) MeV, with a global significance of 2.8 & sigma;, is a nice candidate for it. We consider the radiative decay widths for the X2 & gamma; & psi; with & psi; = J/& psi;, & psi; (2S) treating the X2 as a DD over bar shallow bound state, and estimate the events of X2 in two-photon collisions that can be collected in the & gamma; J/& psi; & gamma; ⠆+⠆- (⠆= e, & mu;) final states at Belle. Based on the upper limit for the ratio of decay widths of X(3872) & gamma; & psi;(2S) and X(3872) & gamma; J/& psi; measured by BESIII, we predict the similar ratio ⠄(X2 & RARR; & gamma; & psi;(2S))/⠄(X2 & RARR; & gamma; J/& psi;) to be smaller than 1.0. We suggest searching for the X2 signal in the & gamma;J/& psi; invariant mass distribution via two-photon fusions. The results will lead to insights into both the X(3872) and the new structure observed by Belle.& COPY; 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license(http://creativecommons .org /licenses /by /4 .0/). Funded by SCOAP3.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/28065]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.[Shi, Pan-Pan 2.Dias, Jorgivan M. 3.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 4.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 5.Beihang Univ, Peng Huanwu Collaborat Ctr Res & Educ, Beijing 100191, Peoples R China
推荐引用方式 GB/T 7714	Shi, Pan-Pan,Dias, Jorgivan M.,Guo, Feng-Kun. Radiative decays of the spin-2 partner of X(3872)[J]. PHYSICS LETTERS B,2023,843:137987.
APA	Shi, Pan-Pan,Dias, Jorgivan M.,&Guo, Feng-Kun.(2023).Radiative decays of the spin-2 partner of X(3872).PHYSICS LETTERS B,843,137987.
MLA	Shi, Pan-Pan,et al."Radiative decays of the spin-2 partner of X(3872)".PHYSICS LETTERS B 843(2023):137987.