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Communications in Theoretical Physics 2022年第7期74卷 99-104页

作者： bao-xi sun xin-Yu Liu Faculty of Science Beijing University of TechnologyBeijing 100124China

The interaction of the pseudo scalar meson and the b ary on octet with strangeness S=-2 and isospin I=1/2 is investigated by solving the Bethe-Salpeter equation in the infinite and finite volume *** is found that there is a resonance state generated dynamically,which owns a mass of about 1550 MeV and a large decay width of 120-200 *** resonance state couples strongly to theπΞ***,it might not correspond to theΞ(1620)particle announced by Belle *** the same time,this problem is studied in the finite volume,and an energy level at 1570 MeV is obtained,which is between theπΞand KΛthresholds and independent of the cubic box size.

关键词： Bethe-Salpeter equation chiral unitary approach amplitude

The possible KK^(*)and D^(*)bound and resonance states by solving the Schrodinger equation

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Communications in Theoretical Physics 2024年第10期76卷 85-91页

作者： bao-xi sun Qin-Qin Cao Ying-Tai sun School of Physics and Optoelectronic Engineering Beijing University of TechnologyBeijing 100124China School of Mechanical and Materials Engineering North China University of TechnologyBeijing 100144China

The Schrodinger equation with a Yukawa type of potential is solved *** different boundary conditions are taken into account,a series of solutions are indicated as a Bessel function,the first kind of Hankel function and the second kind of Hankel function,***,the scattering processes of K^(*)and D^(*)are *** the K^(*)sector,the f_(1)(1285)particle is treated as a K^(*)bound state,therefore,the coupling constant in the K^(*)Yukawa potential can be fixed according to the binding energy of the f_(1)(1285)***,a K^(*)resonance state is generated by solving the Schrodinger equation with the outgoing wave condition,which lies at 1417-i18 MeV on the complex energy *** is reasonable to assume that the K^(*)resonance state at 1417-i18 MeV might correspond to the f_(1)(1420)particle in the review of the Particle Data *** the D^(*)sector,since the X(3872)particle is almost located at the D^(*)threshold,its binding energy is approximately equal to ***,the coupling constant in the D^(*)Yukawa potential is determined,which is related to the first zero point of the zero-order Bessel *** to the K^(*)case,four resonance states are produced as solutions of the Schrodinger equation with the outgoing wave *** is assumed that the resonance states at 3885~i1 MeV,4029-i108 MeV,4328-i191 MeV and 4772-i267 MeV might be associated with the Zc(3900),the X(3940),theχ_(c1)(4274)andχ_(c1)(4685)particles,*** is noted that all solutions are isospin degenerate.

关键词： non-Hermitian quantum mechanics Schrodinger equation meson-meson interaction one-pion exchanging potential resonance state bound state

Pseudoscalar meson and baryon octet interaction with strangeness zero in the unitary coupled-channel approximation

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Chinese Physics C 2019年第6期43卷 107-114页

作者： bao-xi sun Si-Yu Zhao xiang-Yu Wang College of Applied Sciences Beijing University of Technology

The interaction of the pseudoscalar meson and the baryon octet is investigated by solving the Bethe-Salpeter equation in the unitary coupled-channel approximation. In addition to the Weinberg-Tomozawa term, the contribution of the s-and u-channel potentials in the-wave approximation are taken into account. In the sector of isospin I=1/2 and strangeness S =0, a pole is detected in a reasonable region of the complex energy plane of ■ in the center-of-mass frame by analyzing the behavior of the scattering amplitude, which is higher than the ηN threshold and lies on the third Riemann sheet. Thus, it can be regarded as a resonance state and might correspond to the N(1535) particle of the Particle Data Group(PDG) review. The coupling constants of this resonance state to the πN,ηN,KΛ and KΣ channels are calculated, and it is found that this resonance state couples strongly to the hidden strange channels. Apparently, the hidden strange channels play an important role in the generation of resonance states with strangeness zero. The interaction of the pseudoscalar meson and the baryon octet is repulsive in the sector of isospin I = 3/2 and strangeness S = 0, so that no resonance state can be generated dynamically.

关键词： chiral Lagrangian pion-nucleon interaction Bethe-Salpeter equation

The Φp bound state in the unitary coupled-channel approximation

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Communications in Theoretical Physics 2023年第5期75卷 142-148页

作者： bao-xi sun Ying-Ying Fan Qin-Qin Cao Faculty of Science Beijing University of TechnologyBeijing 100124China

The strong attractive interaction of the φ meson and the proton has recently been reported by the ALICE *** corresponding scattering length f_(0) is given as Re(f_(0))=0.85±0.34(stat)±0.14(syst)and Im(f_(0))=0.16±0.10(stat)±0.09(syst)*** fact that the real part is significant in contrast to the imaginary part indicates a dominant role of elastic scattering,whereas the inelastic process is less *** this work,such scattering processes are inspected based on a unitary coupled-channel approach inspired by the Bethe-Salpeter *** φp scattering length is calculated based on this approach,and it is found that the experimental value of the φp scattering length can be obtained only if the attractive interaction of the φ meson and the proton is taken into account.A significant outcome of such attractive interaction is a two-pole structure in the φp scattering *** of the poles,located at(1969−i283)MeV might correspond to N(1895)1/2^(−)or N(1875)3/2^(−)as listed in the review of the Particle Data Group(PDG).The other one,located at 1949−i3 MeV should be a φN bound state,which has no counterpart in the PDG data.

关键词： hadronic structure hadronic resonance Bethe-Salpeter equation chiral effective theory unitary coupled-channel approach vector meson-baryon octet interaction

The possible K■ and D■ bound and resonance states by solving the Schrodinger equation

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Communications in Theoretical Physics 2024年第10期 87-93页

作者： bao-xi sun Qin-Qin Cao Ying-Tai sun School of Physics and Optoelectronic Engineering Beijing University of Technology School of Mechanical and Materials Engineering North China University of Technology

The Schrodinger equation with a Yukawa type of potential is solved *** different boundary conditions are taken into account,a series of solutions are indicated as a Bessel function,the first kind of Hankel function and the second kind of Hankel function,***,the scattering processes of K■ and D■ are *** the K■ sector,the f1（1285） particle is treated as a K■ bound state,therefore,the coupling constant in the K■ Yukawa potential can be fixed according to the binding energy of the f1（1285） ***,a K■ resonance state is generated by solving the Schrodinger equation with the outgoing wave condition,which lies at 1417-i18 MeV on the complex energy *** is reasonable to assume that the K■ resonance state at 1417-i18 MeV might correspond to the f1（1420） particle in the review of the Particle Data *** the D■ sector,since the X（3872）particle is almost located at the D■ threshold,its binding energy is approximately equal to ***,the coupling constant in the D■ Yukawa potential is determined,which is related to the first zero point of the zero-order Bessel *** to the K■ case,four resonance states are produced as solutions of the Schrodinger equation with the outgoing wave *** is assumed that the resonance states at 3885～i1 MeV,4029-i108 MeV,4328-i191 MeV and 4772-i267 MeV might be associated with the Zc（3900）,the X（3940）,the χc1（4274） andχc1（4685） particles,*** is noted that all solutions are isospin degenerate.

关键词：

Nuclear collective excitations in Landau Fermi liquid theory

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Nuclear collective excitations in Landau Fermi liquid theory

In-medium properties of kaons in a chiral approach

第十三届全国核结构研讨会暨第九次全国“核结构与量子力学”专题讨论会

作者： bao-xi sun~(1)) Institute of Theoretical Physics,College of Applied Sciences,Beijing University of Technology,Beijing 100124,China

The nuclear collective excitations are studied within Landau Fermi liquid *** using the nucleon-nucleon interaction of the linearσ—ωmodel,the nuclear collective excitation energies of different values of l are obtained,which are fitted with the centroid energies of the giant resonances of spherical nuclei, *** addition,it is pointed out that the isovector giant resonances except l= 1 correspond to the modes that protons are in the creation state and neutrons are in the annihilation state,and vice *** mixtures of the nuclear collective excitation states with different values of l are predicted.

关键词： Collective levels Effective interaction in nuclear systems Nuclear Matter Fermi liquid theory

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In-medium properties of kaons in a chiral approach

Mechanistic insight into the synergy between nickel single atoms and nanoparticles on N-doped carbon for electroreduction of CO2

第十三届全国核物理大会暨第八届会员代表大会

作者： Yue-Lei Cui bao-xi sun Institute of Theoretical Physics,College of Applied Sciences Beijing University of Technology,100022 Beijing

The first order self-energy corrections of the kaon in the symmetric nuclear matter are calculated from kaon-nucleon scattering matrix elements using a chiral Lagrangian within the framework of relativistic mean field *** shows that the effective mass and the potential of ＄K^+＄ meson are identical with those of K^- meson in the nuclear matter,

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Journal of Energy Chemistry 2025年第1期100卷 327-336页

作者： Mingdong sun Wenwen Guan Cailing Chen Chao Wu xiaoling Liu Biao Meng Tao Chen Yu Han Jun Wang Shibo xi Yu Zhou State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Advanced Membranes and Porous Materials Center Physical Sciences and Engineering Division King Abdullah University of Science and Technology Institute of Sustainability for Chemicals Energy and Environment A*STAR (Agency for Science Technology and Research) College of Materials Science and Engineering Sichuan University

The synergy of single atoms （SAs） and nanoparticles （NPs） has demonstrated great potential in promoting the electrocatalytic carbon dioxide reduction reaction （CO2RR）;however,the rationalization of the SAs/NPs proportion remains one challenge for the catalyst ***,a Ni2+-loaded porous poly（ionic liquids）(PIL) precursor synthesized through the free radical self-polymerization of the ionic liquid monomer,1-allyl-3-vinylimidazolium chloride,was pyrolyzed to prepare the Ni,N co-doped carbon materials,in which the proportion of Ni SAs and NPs could be facilely modulated by controlling the annealing *** catalyst Ni-NC-1000 with a moderate proportion of Ni SAs and NPs exhibited high efficiency in the electrocatalytic conversion of CO2into *** Ni K-edge X-ray absorption near-edge structure （XANES） spectra and theoretical calculations were conducted to gain insight into the synergy of Ni SAs and *** charge transfer from Ni NPs to the surrounding carbon layer and then to the Ni SAs resulted in the electron-enriched Ni SAs active *** the electroreduction of CO2,the coexistence of Ni SAs and NPs strengthened the CO2activation and the affinity towards the key intermediate of*COOH,lowering the free energy for the potential-determining*CO2→*COOH step,and therefore promoted the catalysis efficiency.

关键词： Activation energy

Deciphering Water Oxidation Catalysts:The Dominant Role of Surface Chemistry over Reconstruction Degree in Activity Promotion

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Nano-Micro Letters 2025年第3期17卷 340-354页

作者： Li An Jianyi Li Yuanmiao sun Jiamin Zhu Justin Zhu Yeow Seow Hong Zhang Nan Zhang Pinxian xi * Zhichuan JXu Chun‑Hua Yan State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu ProvinceFrontiers Science Center for Rare IsotopesCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000People’s Republic of China School of Materials Science and Engineering Nanyang Technological UniversitySingapore 639798Singapore Faculty of Materials Science and Energy Engineering Institute of Technology for Carbon NeutralityShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055People’s Republic of China Key Laboratory of Electromagnetic Materials and Devices National Center for International Research On Photoelectric and Energy MaterialsSchool of Materials and EnergyElectron Microscopy CenterYunnan UniversityKunming 650091People’s Republic of China State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030People’s Republic of China Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsPKU‑HKU Joint Laboratory in Rare Earth Materials and Bioinorganic ChemistryPeking UniversityBeijing 100871People’s Republic of China

Water splitting hinges crucially on the availability of electrocatalysts for the oxygen evolution *** surface reconstruction has been widely observed in perovskite catalysts,and the reconstruction degree has been often correlated with the activity ***,a systematic study on the roles of Fe substitution in activation of perovskite LaNiO_(3)is *** substituting Fe content influences both current change tendency and surface reconstruction ***_(0.9)Fe_(0.1)O_(3)is found exhibiting a volcano-peak intrinsic activity in both pristine and reconstructed among all substituted perovskites in the LaNi_(1-x)Fe_(x)O_(3)(x=0.00,0.10,0.25,0.50,0.75,1.00)*** reconstructed LaNi_(0.9)Fe_(0.1)O_(3)shows a higher intrinsic activity than most reported NiFe-based ***,density functional theory calculations reveal that Fe substitution can lower the O 2p level,which thus stabilize lattice oxygen in LaNi0.9Fe0.1O3 and ensure its long-term ***,it is vital interesting that activity of the reconstructed catalysts relied more on the surface chemistry rather than the reconstruction *** effect of Fe on the degree of surface reconstruction of the perovskite is decoupled from that on its activity enhancement after surface *** finding showcases the importance to customize the surface chemistry of reconstructed catalysts for water oxidation.

关键词： Oxygen evolution reaction Perovskite oxides Doping Activation and reconstruction

SHL20-25/400-A型锅炉过热器爆管的处理

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节能技术 2002年第2期20卷 46-47页

作者：包喜国孙颖抚顺特殊钢有限责任公司水汽分厂辽宁抚顺113001

介绍SHL2 0 - 2 5 /4 0 0 -A型锅炉过热器爆管的原因和处理方法。

关键词： SHL20-25/400-A型锅炉过热器爆管处理