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Interpretation of theη_(1)(1855)as a KK_(1)(1400)+***

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Science China(Physics,Mechanics & Astronomy) 2022年第6期65卷 60-66页

作者： xiang-kun dong Yong-Hui Lin Bing-Song Zou 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 fur Strahlen-und Kernphysik and Bethe Center for Theoretical Physics Universitat BonnBonn D-53115Germany School of Physics Central South UniversityChangsha 410083China

An exotic state with J^(PC)=1^(−+),denoted byη1(1855),was observed by BESIII Collaboration recently in J/ψ→γηη′.The fact that its mass is just below the threshold of KK_(1)(1400)stimulates us to investigate whether this exotic state can be interpreted as a KK_(1)(1400)+*** or *** the one boson exchange model,we show that it is possible for KK_(1)(1400)with J^(PC)=1^(−+)to bind together by taking the momentum cutoffΛ&2 GeV and yield the same binding energy as the experimental value whenΛ≈2.5 *** this molecular picture,the predicted branch ratio Br(η1(1855)→ηη′)≈15%is consistent with the experimental results,which again supports the molecular explanation ofη1(1855).Relevant systems,namely KK_(1)(1400)with JPC=1−−and KK_(1)(1270)with J^(PC)=1^(−±),are also investigated,some of which can be searched for in the future experiments.

关键词： hadronic molecule exotic hadrons one boson exchange

Derived Born cross sections of e^+e^-annihilation into open charm mesons from CLEO-c measurements

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Chinese Physics C 2018年第4期42卷 69-75页

作者： xiang-kun dong Liang-Liang Wang Chang-Zheng Yuan University of Chinese Academy of Sciences Beijing 100049 China Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China

The exclusive Born cross sections of the production of D0, D＋ and Ds＋ mesons in e＋e- annihilation at 13 energy points between 3.970 and 4.260 GeV are obtained by applying corrections for initial state radiation and vacuum polarization to the observed cross sections measured by the CLEO-c experiment. Both the statistical and the systematic uncertainties for the obtained Born cross sections are estimated.

关键词： electron-positron annihilation charm production Born cross section radiative correction

Hadronic cross section of e^+e^- annihilation at bottomonium energy region

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Chinese Physics C 2020年第8期44卷 1-15页

作者： xiang-kun dong Xiao-Hu Mo Ping Wang Chang-Zheng Yuan Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

The Born cross section and dressed cross section of e+e−→bb¯and the total hadronic cross section in e+e−annihilation in the bottomonium energy region are calculated based on the Rb values measured by the BaBar and Belle *** data are used to calculate the vacuum polarization factors in the bottomonium energy region,and to determine the resonant parameters of the vector bottomonium(-like)states Y(10750),Υ(5S),andΥ(6S).

关键词： e^+e^-annihilation bottmonium spectroscopy vacuum polarization

Interpretation of the η1(1855) as a K■1(1400) + c.c. molecule

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Science China(Physics,Mechanics & Astronomy) 2022年第6期65卷 64-70页

作者： xiang-kun dong Yong-Hui Lin Bing-Song Zou CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences School of Physical Sciences University of Chinese Academy of Sciences Helmholtz-Institut für Strahlen-und Kernphysik and Bethe Center for Theoretical Physics Universit?t Bonn School of Physics Central South University

An exotic state with JPC= 1-+, denoted by η1(1855), was observed by BESⅢ Collaboration recently in J/ψ → γηη′. The fact that its mass is just below the threshold of K■1(1400) stimulates us to investigate whether this exotic state can be interpreted as a K■1(1400) + c.c. molecule or not. Using the one boson exchange model, we show that it is possible for K■1(1400) with JPC= 1-+to bind together by taking the momentum cutoff Λ ≥2 Ge V and yield the same binding energy as the experimental value when Λ ≈ 2.5 GeV. In this molecular picture, the predicted branch ratio Br(η1(1855) → ηη′) ≈ 15% is consistent with the experimental results, which again supports the molecular explanation of η1(1855). Relevant systems, namely K■1(1400) with JPC= 1--and K■1(1270) with JPC= 1-±, are also investigated, some of which can be searched for in the future experiments.

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Interpretation of the η;（1855） as a K■;（1400） + c.c. molecule

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Science China(Physics,Mechanics & Astronomy) 2022年

An exotic state with J;=1;,denoted by η;（1855）,was observed by BESIII Collaboration recently in J/ψ→γηη;.The fact that its mass is just below the threshold of K■;（1400） stimulates us to investigate whether this exotic state can be interpreted as a K■;（1400）+*** or *** the one boson exchange model,we show that it is possible for K■;（1400） with J;=1;to bind together by taking the momentum cutoffΛ2 GeV and yield the same binding energy as the experimental value whenΛ≈2.5 *** this molecular picture,the predicted branch ratio Br(η;（1855）→ηη;)≈15%is consistent with the experimental results,which again supports the molecular explanation ofη;（1855）.Relevant systems,namely K■;（1400） with J;=1;and K■;（1270） with J;=1;,are also investigated,some of which can be searched for in the future experiments.

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Is the existence of a J/ψJ/ψbound state plausible?

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

作者： xiang-kun dong Vadim Baru Feng-kun Guo Christoph Hanhart Alexey Nefediev Bing-Song Zou 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

In a recent measurement LHCb reported pronounced structures in the J/ψJ/ψ*** of the various possible explanations of those is that they emerge from non-perturbative interactions of vector *** is thus important to understand whether it is possible to form a bound state of two charmonia interacting through the exchange of gluons,which hadronise into two pions at the longest *** this paper,we demonstrate that,given our current understanding of hadron-hadron interactions,the exchange of correlated light mesons(pions and kaons)is able to provide sizeable attraction to the di-J/ψsystem,and it is possible for two J/ψmesons to form a bound *** a side result we find from an analysis of the data for theψ/(2 S)J/ψππtransition including bothππand KK final state interactions an improved value for theψ(2 S)→J/ψtransition chromo-electric polarisability:|αψ(2 S)J/ψ|=(1.8±0.1)GeV-3,where the uncertainty also includes the one induced by the final state interactions.

关键词： Fully-charm tetraquark Hadronic molecule Exotic hadron Dispersion relation

Molecular states in D_(s)^(*)+=^_(c)^(′,*)systems^(*)

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Chinese Physics C 2023年第12期47卷 16-30页

作者：尼加提·亚力坤董相坤邹冰松 School of Physics Science and Technology Xinjiang UniversityUrumqi 830046China 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 Southern Center for Nuclear-Science Theory(SCNT) Institute of Modern PhysicsChinese Academy of SciencesHuizhou 516000China

The possible hadronic molecules in D_(S)^(∗)+Ξ_(c)(′,∗)systems with J^(P)=1/2−,3/2−,and 5/2−are investigated with interactions described by light meson *** varying the cutoff in a phenomenologically reasonable range of 1−2.5 GeV,we find ten near-threshold(bound or virtual)states in the single-channel *** introducing the coupled-channel dynamics of D_(+)^(s)Ξ_(c)-D_(s)^(+)Ξ′c-D_(s)^(∗+)Ξ_(c-)D_(s)^(+)Ξ_(c)^(*)-D_(s)^(∗)+sΞ′_(c)-D_(s)^(∗)Ξ_(c)^(∗)systems,these states,except those below the lowest channels in each JP sector,move into the complex energy plane and become resonances in the mass range 4.43−4.76 *** spin-parities and nearby thresholds are 1/2−(D_(s)^(+)Ξ′_(c)),1/2^(−)(D_(s)^(++)Ξ_(c)^(*)),1/2−(D_(s)^(∗+)Ξ_(c)),1/2−(D_(s)^(∗+)Ξ_(c)^(′)),1/2−(D_(s)^(∗+)Ξ_(c)^(∗)),3/2−(D_(s)^(∗+)(Ξc),3/2−(D_(s)^(+)Ξ_(c)),3/2−(D_(s)^(∗+)Ξ′c),3/2−(D_(+s)^(∗)Ξ_(c)^(∗)),and 5/2−(D_(s)^(∗+)Ξ_(c)^(∗)).The impact of theδ(r)-term in the one-boson-exchange model on these states is ***Λ=1.5 GeV as an illustrative value,it is found that 1/2−(D_(s)^(*+)Ξ_(c))is a stable bound state(becoming unstable if the coupling to lower channels is turned on),1/2−(D∗+sΞc)and 3/2−(D_(s)^(∗+)Ξ_(c))are physical resonances in cases where theδ(r)-term is included or excluded,and the other seven states are physical resonances or"virtual-state-like"poles near thresholds,depending on whether theδ(r)-term is *** addition,the partial decay widths of the physical resonances are *** double-charm hidden-strangeness pentaquark states,as the partners of the experimentally observed Pc and Pcs states,can be searched for in the D(∗)Λ_(c)final states in the future.

关键词： pentaquarks chiral perturbation theory resonance

Research on Resilience Assessment and Improvement Methods of New Energy Bases Under Strong Sandstorm

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Dianwang Jishu/Power System Technology 2025年第1期49卷 124-135页

作者： Wang, Jinyan Ding, kun Sun, Yalu Wang, xiang dong, Haiying College of New Energy and Power Engineering Lanzhou Jiaotong University Gansu Province Lanzhou 730070 China State Grid Gansu Electric Power Company Gansu Province Lanzhou 730000 China Tsinghua Sichuan Energy Internet Research Institute Sichuan Province Chengdu 610213 China

The natural endowments of wind and solar resources in the desert and Gobi Desert areas of our country, as well as the reverse distribution of energy and load, make it of great significance to develop large-scale new energy bases and large-scale transmission of AC/DC hybrid power grids in the desert and Gobi Desert areas. The frequent occurrence of extreme sandstorms in the desert and Gobi Desert areas has seriously affected the centralized development and long-distance safe and stable transmission of new energy power generation bases. This article first quantifies the impact of two disaster-causing factors of sandstorms on new energy bases, establishes a mathematical model that reflects the relationship between sandstorms and new energy output, strong winds, and line failure rates, uses Monte Carlo sampling combined with system information entropy to select typical fault scenarios and construct a recovery model, obtains the system elasticity curve based on operating conditions, considers the entire process of system disaster, and adopts the Analytic Hierarchy Process (AHP) method Establish elasticity evaluation indicators;Secondly, a flexible improvement method is proposed from a planning perspective, to minimize the equivalent annual investment cost of the line and energy storage and the system's loss of load cost. A joint planning model for line expansion and energy storage configuration for flexible improvement is established, which is transformed into a mixed integer linear programming (MILP) problem, and the expansion plan of the new energy baseline and the optimal configuration of energy storage are solved. Finally, taking the improved IEEE36 node system as an example for simulation analysis, the elasticity indicators before and after adopting improvement measures are compared to verify the effectiveness and accuracy of the proposed elasticity evaluation and improvement methods. © 2025 Power System Technology Press. All rights reserved.

关键词： Charge storage

AZD1775 synergizes with SLC7A11 inhibition to promote ferroptosis

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Science China Life Sciences 2025年第1期68卷 204-218页

作者： Chen Xiong Hong Ling Yingdan Huang Hanzhi dong Bangxiang Xie Qian Hao xiang Zhou Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences Fudan University Department of Oncology Shanghai Medical CollegeFudan University Department of Breast Surgery Fudan University Shanghai Cancer CenterFudan University Department of Oncology First Affiliated Hospital of Nanchang University Beijing Institute of Hepatology Beijing Youan HospitalCapital Medical University Beijing Engineering Research Center for Precision Medicine and Transformation of Hepatitis and Liver Cancer Key Laboratory of Breast Cancer in Shanghai Fudan University Shanghai Cancer CenterFudan University Shanghai Key Laboratory of Medical Epigenetics International Co-laboratory of Medical Epigenetics and Metabolism (Ministry of Science and Technology)Institutes of Biomedical SciencesFudan University

Tumor suppressor p53-mediated cell cycle arrest and DNA damage repair may exert cytoprotective effects against cancer therapies, including WEE1 inhibition. Considering that p53 activation can also lead to multiple types of cell death, the role of this tumor suppressor in WEE1 inhibitor-based therapies remains disputed. In this study, we reported that nucleolar stress-mediated p53 activation enhanced the WEE1 inhibitor AZD1775-induced ferroptosis to suppress lung cancer growth. Our findings showed that AZD1775 promoted ferroptosis by blocking cystine uptake, an action similar to that of Erastin. Meanwhile, inhibition of WEE1 by the WEE1 inhibitors or si RNAs induced compensatory upregulation of SLC7A11, which conferred resistance to ferroptosis. Mechanistically, AZD1775 prevented the enrichment of H3K9me3, a histone marker of transcriptional repression, on the SLC7A11 promoter by repressing the expression of the histone methyltransferase SETDB1, thereby enhancing NRF2-mediated SLC7A11 transcription. This finding was also validated using the H3K9me3 inhibitor BRD4770. Remarkably, we found that the nucleolar stress-inducing agent Actinomycin D(Act. D) inhibited SLC7A11 expression by activating p53, thus augmenting AZD1775-induced ferroptosis. Moreover, the combination of AZD1775 and Act. D synergistically suppressed wild-type p53-harboring lung cancer cell growth both in vitro and in vivo. Altogether, our study demonstrates that AZD1775 promotes ferroptosis by targeting cystine uptake but also mediates the adaptive activation of SLC7A11 through the WEE1-SETDB1 cascade and NRF2-induced transcription, and inhibition of SLC7A11 by Act. D boosts the anti-tumor efficacy of AZD1775 by enhancing ferroptosis in cancers with wild-type p53.

关键词： p53 NRF2 SLC7A11 WEE1 AZD1775 ferroptosis nucleolar stress