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The Ω(2012) as a Hadronic Molecule

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Chinese Physics Letters 2024年第8期41卷 13-16页

作者： Ju-Jun Xie li-sheng geng Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Sciences and Technology University of Chinese Academy of SciencesBeijing 101408China Southern Center for Nuclear-Science Theory(SCNT) Institute of Modern PhysicsChinese Academy of SciencesHuizhou 516000China School of Physics Beihang UniversityBeijing 102206China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 102206China Peng Huanwu Collaborative Center for Research and Education Beihang UniversityBeijing 100191China

Recently,a new excited baryon state,Ω(2012),was observed in the invariant mass spectra of𝐾K^(-)■^(0) and K_(S)^(0)■^(-)by the Belle *** state has a narrow width(∼6 MeV)compared to other baryon states with a similar ***,we provide a mini-review on the Ω(2012)state from the molecular perspective,where it appears to be a dynamically generated state with spin-parity 3/2^(−)from the coupled-channels interactions of the K■(1530)and ηΩ in s-wave and K■ in𝑑***,alternative explanations for the Ω(2012)resonance are also discussed.

关键词： wave. invariant state

Prediction of anΩ_(bbb)Ω_(bbb)Dibaryon in the Extended One-Boson Exchange Model

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Chinese Physics Letters 2021年第10期38卷 6-11页

作者： Ming-Zhu liu li-sheng geng School of Space and Environment Beihang UniversityBeijing 102206China School of Physics Beihang UniversityBeijing 102206China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 102206China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China

Since Yukawa proposed that the pion is responsible for mediating the nucleon-nucleon interaction,meson exchanges have been widely used in understanding hadron-hadron *** most studied mesons are theσ,π,ρ,andω,while other heavier mesons are often argued to be less relevant because they lead to short range ***,whether the range of interactions is short or long should be judged with respect to the size of the system *** propose that one charmonium exchange is responsible for the formation of theΩ_(bbb)Ω_(bbb)dibaryon,recently predicted by lattice QCD *** same approach can be extended to the strangeness and bottom sectors,leading to the prediction on the existence of??and?bbb dibaryons,while the former is consistent with the existing lattice QCD results,the latter remains to *** addition,we show that the Coulomb interaction may break up theΩ_(bbb)Ω_(bbb)pair but not theΩ_(bbb)Ω_(bbb)dibaryons.

关键词： meson interaction checked

Neutron drip line of Z=9–11 isotopic chains

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Chinese Physics C 2020年第7期44卷 87-94页

作者： Rong An Guo-Fang Shen Shi-sheng Zhang li-sheng geng School of Physics Beihang UniversityBeijing 100191China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China Beijing Advanced Innovation Center for Big Data-based Precision Medicine Beihang UniversityBeijing 100191China School of Physics and Microelectronics Zhengzhou UniversityZhengzhouHenan 450001China

A recent experimental breakthrough identified the last bound neutron-rich nuclei in fluorine and neon *** on this finding,we perform a theoretical study of Z=9,10,11,12 isotopes in the relativistic mean field(RMF)*** mean field parameters are assumed from the PK1 parameterization,and the pairing correlation is described by the particle number conservation BCS(FBCS)method recently formulated in the RMF *** show that the FBCS approach plays an essential role in reproducing experimental results of fluorine and neon ***,we predict 39Na and 40Mg to be the last bound neutron-rich nuclei in sodium and magnesium isotopes.

关键词： drip line relativistic mean field theory particle number conservation

Discriminating 1D new physics solutions in b→slldecays

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Chinese Physics C 2022年第6期46卷 114-123页

作者： Shuang-Yi li Rui-Xiang Shi li-sheng geng School of Physics Beihang UniversityBeijing 102206China School of Space and Environment Beihang UniversityBeijing 102206China School of Physics&Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 102206China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China

The recent measurements of RK^(+),R_(K_(S)^(O)),RK^(*+),Bs→μ+μ-,a set of CP-averaged angular observables for the B^(0)→K^(*0)μ^(+)μ^(-)decay and its isospin partner B^(+)→K^(*+)μ^(+)μ^(-)by the LHCb Collaboration consistently hint at lepton universality violation in the b→sll *** this work,we first perform global fits to the b→sll data and show that five one-dimensional scenarios,i.e,δC_(9)^(μ),δC_(10)^(μ),δC_(L)^(μ),δC_(9)^(μ)=C_(10)^(μ’),andδC_(9)^(μ)=-C_(9)^(μ’)can best explain the so-called B ***,we explore how these scenarios can be distinguished from each *** this purpose,we first study the combinations of four angular asymmetries Ai(i=3,4,5,9)and find that they cannot distinguish the five new physics *** then show that a newly constructed ratio RS can uniquely discriminate the five new physics scenarios in proper intervals of q^(2) if it can be measured with percent-level precision.

关键词： lepton universality violation rare B meson decays beyond SM physics

Charge radii of potassium isotopes in the RMF(BCS)^(*) approach

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Chinese Physics C 2022年第5期46卷 108-115页

作者： Rong An Shi-sheng Zhang li-sheng geng Feng-Shou Zhang Key Laboratory of Beam Technology of Ministry of Education Institute of Radiation TechnologyBeijing Academy of Science and TechnologyBeijing 100875China Key Laboratory of Beam Technology of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China School of Physics Beihang UniversityBeijing 100191China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 102206China School of Physics and Microelectronics Zhengzhou UniversityZhengzhouHenan 450001China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of LanzhouLanzhou 730000China

We apply the recently proposed RMF(BCS)*ansatz to study the charge radii of the potassium isotopic chain up to^(52)*** is shown that the experimental data can be reproduced rather well,qualitatively similar to the Fayans nuclear density functional theory,but with a slightly better description of the odd-even staggerings(OES).Nonetheless,both methods fail for ^(50)K and to a lesser extent for ^(48,52)*** is shown that if these nuclei are deformed with aβ_(20)≈−0.2,then one can obtain results consistent with experiments for both charge radii and *** argue that beyond-mean-field studies are needed to properly describe the charge radii of these three nuclei,particularly for ^(50)K.

关键词： relativistic mean field theory charge radius odd-even staggering

^(3)S_(1)–^(3)D_(1) coupled channel Λ_(c)N interactions:chiral effective field theory versus lattice QCD

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Communications in Theoretical Physics 2023年第1期75卷 86-95页

作者： Jing Song Yang Xiao Zhi-Wei liu Kai-Wen li li-sheng geng School of space and environment Beihang UniversityBeijing102206China School of Physics Beihang UniversityBeijing102206China UniversitéParis-Saclay CNRS/IN2P3IJCLabOrsayF-91405France Medical Management Department CAS Ion Medical Technology Co.LtdBeijing 100190China Beijing Advanced Innovation Center for Big Data-Based Precision Medicine School of Medicine and EngineeringBeihang UniversityKey Laboratory of Big Data-Based Precision Medicine(Beihang University)Ministry of Industry and Information TechnologyBeijing100191China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing102206China School of Physics and Microelectronics Zhengzhou UniversityZhengzhouHenan450001China

We study the lattice QCDΛ_(c)N phase shifts for the^(3)S_(1)-^(3)D_(1)coupled channel using both the leading order covariant chiral effective theory and the next-to-leading order non-relativistic chiral effective field theory(ChEFT).We show that although it is possible to describe simultaneously the^(3)S_(1)and^(3)D_(1)phase shifts and the inelasticityη_(1),the fitted energy range is quite small,only up to E_(c.m.)=5 *** raises concerns regarding the consistency between leading/next-to-leading order ChEFT and the lattice QCD simulations.

关键词： Λ_(c)N interaction covariant ChEFT lattice QCD

GPU-based cross-platform Monte Carlo proton dose calculation engine in the framework of Taichi

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Nuclear Science and Techniques 2023年第5期34卷 152-162页

作者： Wei-Guang li Cheng Chang Yao Qin Zi-Lu Wang Kai-Wen li li-sheng geng Hao Wu School of Physics Beihang UniversityBeijing 102206China Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Department of Radiation OncologyPeking University Cancer Hospital and Institute52 Fucheng RoadBeijing 100142China Medical Management Department CAS Ion Medical Technology Co.Ltd.Beijing 100190China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 102206China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China Institute of Medical Technology Peking University Health Science Center38 Xueyuan RoadBeijing 100191China

In recent years,graphics processing units(GPUs)have been applied to accelerate Monte Carlo(MC)simulations for proton dose calculation in ***,current GPU platforms,such as Compute Unified Device Architecture(CUDA)and Open Computing Language(OpenCL),suffer from cross-platform limitation or relatively high programming ***,the Taichi toolkit,which was developed to overcome these difficulties,has been successfully applied to high-performance numerical *** on the class II condensed history simulation scheme with various proton-nucleus interactions,we developed a GPU-accelerated MC engine for proton transport using the Taichi *** distributions in homogeneous and heterogeneous geometries were calculated for 110,160,and 200 MeV protons and were compared with those obtained by full MC simulations using *** gamma passing rates were greater than 0.99 and 0.95 with criteria of 2 mm,2%and 1 mm,1%,respectively,in all the benchmark ***,the calculation speed was at least 5800 times faster than that of TOPAS,and the number of lines of code was approximately 10 times less than those of CUDA or *** study provides a highly accurate,efficient,and easy-to-use proton dose calculation engine for fast prototyping,beamlet calculation,and education purposes.

关键词： Proton therapy Monte Carlo dose calculation GPU acceleration Taichi

Renormalizability of leading order covariant chiral nucleon-nucleon interaction

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Chinese Physics C 2021年第5期45卷 113-121页

作者： Chun-Xuan Wang li-sheng geng Bingwei Long School of Physics Beihang UniversityBeijing 102206China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China Beijing Advanced Innovation Center for Big Data-based Precision Medicine Beihang UniversityBejing 100191China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China College of Physics Sichuan UniversitySichuan 610065China

In this work,we study the renormalization group invariance of the recently proposed covariant power counting in the case of nucleon-nucleon scattering[***.C 42(2018)014103]at leading *** show that unlike the Weinberg scheme,renormalizaion group invariance is satisfied in the^(3)P0 *** interesting feature is that the^(1)S0 and^(3)P1 channels are *** the relevant low energy constants by ftting to the^(1)S0 phase shiftsat T_(lab)=10 and 25 MeV with cutoff values∧=400-650 MeV,one can describe the 3 P1 phase shifts relatively *** the limit of∧→∞,the^(1)S0 phase shifts become cutoff-independent,whereas the 3P1 phase shifts do *** is consistent with the Wigner bound and previous observations that the 3P1 channel is best treated *** for the^(2)P1 and^(3)S1-^(3)D1 channels,renormalization group invariance is satisfied.

关键词： nucleon-nucleon interaction chiral effective field theory renormalization group invariance

The X(4140) and X(4160) resonances in the e^(+)e^(-)→γJ/ψΦ reaction

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Chinese Physics C 2019年第11期43卷 11-20页

作者： En Wang Ju-Jun Xie li-sheng geng Eulogio Oset School of Physics Zhengzhou UniversityZhengzhouHenan 450001 China 2Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000 China 3University of Chinese Academy of Sciences Beijing 101408 China 4School of Physics and Nuclear Energy Engineering and International Research Center for Nuclei and Particles in the Cosmos Beihang UniversityBeijing 100191 China 5Departamento de Física Teórica and IFIC Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de PaternaAptdo.2208546071 ValenciaSpain

We investigate the J/Ψ? invariant mass distribution in the e^+e^-→γJ/Ψ? reaction at a center-of-mass energy of ■=4.6 GeV measured by the BESⅢ collaboration,which concluded that no significant signals were observed for e^+e^-→γX(4140) because of the low *** show,however,that the J/Ψ? invariant mass distribution is compatible with the existence of the X(4140) state,appearing as a peak,and a strong cusp structure at the D_s~*■threshold,resulting from the molecular nature of the X(4160) state,which provides a substantial contribution to the *** is consistent with our previous analysis of the B^+→J/Ψ?K^+decay measured by the LHCb *** strongly suggest further measurements of this process with more statistics to clarify the nature of the X(4140) and X(4160) resonances.

关键词： ΦX(4140) J/ψΦ scattering heavy flavor hadrons X(4160)