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Isospin-conserving hadronic decay of the D_(s1)(2460) into D_(s)π^(+)π^(-)

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Communications in Theoretical Physics 2023年第5期75卷 119-127页

作者： Meng-Na Tang Yong-Hui Lin Feng-Kun Guo christoph hanhart Ulf-G.Meißner CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Helmholtz-Institut für Strahlen-und Kernphysik and Bethe Center for Theoretical Physics Universität BonnD-53115 BonnGermany Peng Huanwu Collaborative Center for Research and Education Beihang UniversityBeijing 100191China Institute for Advanced Simulation and Institut für Kernphysik Forschungszentrum JülichD-52425 JülichGermany Tbilisi State University 0186 TbilisiGeorgia

The internal structure of the charm-strange mesons D_(s0)^(*)(2317)and D_(s1)(2460)are the subject of intensive *** widths are small because they decay dominantly through isospinbreaking hadronic channels D_(s0)^(*)(2317)^(+)→D_(s)^(+)π^(0) and D _(s1)(2460)^(+)→D_(s)^(*+)π^(0).The D_(s1)(2460)can also decay into the hadronic final states D_(s)^(+)ππ,conserving *** that case there is,however,a strong suppression from phase *** study the transition D_(s1)(2460)^(+)→D_(s)^(+)π^(+)π^(-)in the scenario that the D_(s1)(2460)is a D^(*)K hadronic *** ππ final state interaction is taken into account through dispersion *** find that the ratio of the partial widths of the Γ(D_(s1)(2460)^(+)→D_(s)^(+)π^(+)π^(-)) / Γ(D_(s1)(2460)^(+)→D_(s)^(*+)π^(0))obtained in the molecular picture is consistent with the existing experimental *** interestingly,we demonstrate that theπ+π−invariant mass distribution shows a double bump structure,which can be used to disentangle the hadronic molecular picture from the compact state picture for the D_(s1)(2460)^(+).Predictions on the B_(s1)^(0)→B_(s)^(0)π^(+)π^(-)are also made.

关键词： hadronic molecule isospin symmetry heavy quark flavor symmetry

Note on X(3872) production at hadron colliders and its molecular structure

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Chinese Physics C 2017年第12期41卷 1-3页

作者： Miguel Albaladejo 郭奉坤 christoph hanhart Ulf-G.Mei?ner Juan Nieves Andreas Nogga 杨智 Departamento de Física Universidad de Murcia CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of Sciences School of Physical Sciences University of Chinese Academy of Sciences Institute for Advanced Simulation Institut für Kernphysik and Jülich Center for Hadron Physics Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics Universitt Bonn Instituto de Física Corpuscular (IFIC) Centro Mixto CSIC-Universidad de ValenciaInstitutos de Investigación de Paterna Institute of Modern Physics Chinese Academy of Sciences

The production of the X（3872） as a hadronic molecule in hadron colliders is clarified. We show that the conclusion of Bignamini et al., Phys. Rev. Lett. 103（2009） 162001, that the production of the X（3872） at high pT implies a non-molecular structure, does not hold. In particular, using the well understood properties of the deuteron wave function as an example, we identify the relevant scales in the production process.

关键词： X(3872) hadronic molecules exotic hadrons

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J/ψJ/ψ束缚态的存在合理吗?

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Science Bulletin 2021年第24期66卷 2462-2470,M0003页

作者：董相坤 Vadim Baru 郭奉坤 christoph hanhart Alexey Nefediev 邹冰松 CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Institut für Theoretische Physik Ⅱ Ruhr-Universität BochumBochum D-44780Germany Institute for Theoretical and Experimental Physics NRC“Kurchatov Institute” Moscow 117218Russia Institute for Advanced Simulation Institut für Kernphysik and Jülich Center for Hadron PhysicsForschungszentrum JülichJülich D-52425Germany P.N.Lebedev Physical Institute of the Russian Academy of Sciences Moscow 119991Russia Moscow Institute of Physics and Technology Moscow 141700Russia School of Physics Central South UniversityChangsha 410083China

得益于世界各大高能物理实验在强子谱研究中的进展,奇特强子态的研究是近20年来强子物理领域的热点.区别于传统夸克模型中三夸克构成的重子和正反夸克对构成的介子,奇特强子态包括由更多夸克构成的多夸克态、夸克胶子构成的混杂态、完... 详细信息

得益于世界各大高能物理实验在强子谱研究中的进展,奇特强子态的研究是近20年来强子物理领域的热点.区别于传统夸克模型中三夸克构成的重子和正反夸克对构成的介子,奇特强子态包括由更多夸克构成的多夸克态、夸克胶子构成的混杂态、完全由胶子构成的胶球等.2020年,LHCb合作组公布了质子质子对撞中产生的J/ψJ/ψ不变质量分布,宣布测到了由4个粲夸克cccc构成的粒子X(6900).在随后的一项研究工作中,本文作者通过拟合实验数据发现了J/ψJ/ψ阈值附近存在一个分子态的迹象.这个态的存在最近也被另一课题组证实.那么这个J/ψJ/ψ分子态是由什么束缚在一起的呢?对低能强相互作用已有的认知能够解释它吗?本文作者研究了J/ψJ/ψ之间交换软胶子的相互作用,其长程部分可以由双π介子和双K介子交换来描述.他们发现,在合理的参数范围之间,这种介子交换的相互作用可以为J/ψJ/ψ形成束缚态提供很大一部分束缚力.这意味着J/ψJ/ψ之间的相互作用可能已经强到足以形成束缚态,而不像大家之前认为的那样小.这个J/ψJ/ψ分子态可以在今后的实验中进行寻找.如果得到证实,那么可以预期现实中会存在一系列类似的分子态,比如ηcηc以及对应的全底四夸克态.

关键词：高能物理实验束缚态强相互作用夸克模型反夸克 π介子强子多夸克态