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夸克之父——盖尔曼
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作者 焦满巧 《湖南中学物理》 2019年第8期97-98,共2页
本文主要介绍伟大的物理学家——盖尔曼非凡的成长经历、对粒子物理学所做的突出贡献以及趣闻轶事,领略一代大家的博学多才、特立独行以及他所带来的'奇异之美'。
关键词 盖尔曼 奇异数 八正法 夸克模型
Transition magnetic moments of JP=3/2+ decuplet to JP=1/2+ octet baryons in the chiral constituent quark model
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作者 Harleen Dahiya 《中国物理C:英文版》 SCIE CAS CSCD 2018年第9期15-22,共8页
关键词 夸克模型 成分 磁性 矩阵元素 夸克 夸克 试验性 对称
夸克模型下的轻介子质量谱
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作者 田苗苗 贾多杰 庞成群 《原子核物理评论》 CSCD 北大核心 2018年第1期5-9,共5页
最近,文献[1]将辅助场方法应用于准相对论性夸克模型中,获得了一个解析的非奇异轻介子质量公式。本文将这种方法推广到奇异轻介子的情况,得到了一个味道依赖的轻介子质量公式。结果表明,质量公式预言的低激发态质量谱与实验值吻合良好,... 最近,文献[1]将辅助场方法应用于准相对论性夸克模型中,获得了一个解析的非奇异轻介子质量公式。本文将这种方法推广到奇异轻介子的情况,得到了一个味道依赖的轻介子质量公式。结果表明,质量公式预言的低激发态质量谱与实验值吻合良好,平均误差在30 MeV左右。质量公式预言的高激发态质量谱和其他文献(特别是弦模型)的计算相比,也符合较好。 展开更多
关键词 轻介子 质量公式 夸克模型 辅助场方法
Electromagnetic Coupling of Negative Parity Nucleon Resonances N(1535) Based on Nonrelativistic Constituent Quark Model
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作者 Sara Parsaei Ali Akbar Rajabi 《理论物理通讯:英文版》 SCIE CAS CSCD 2018年第1期43-49,共7页
关键词 夸克模型 电磁 SCHRODINGER 回声 核子 等值 否定 成分
夸克蜕定域色屏蔽模型研究Σc(2800)和Λc(2940) 预览
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作者 赵丽芳 黄虹霞 《南京师大学报:自然科学版》 CSCD 北大核心 2018年第3期47-51,共5页
在夸克蜕定域色屏蔽模型框架下,利用共振群方法研究了同位旋为I=0和I=1,角动量为JP=12±,32±,52±的分子态ND体系,发现所有的正宇称态都不束缚.经过多道耦合计算,我们得到了I=0,JP=12-的ND分子态,可以用来解释实... 在夸克蜕定域色屏蔽模型框架下,利用共振群方法研究了同位旋为I=0和I=1,角动量为JP=12±,32±,52±的分子态ND体系,发现所有的正宇称态都不束缚.经过多道耦合计算,我们得到了I=0,JP=12-的ND分子态,可以用来解释实验上报道的Σc(2800),I=0,JP=32-的ND*分子态可以解释实验报道的Λc(2940),另外还存在一个I=1,JP=52-的ΔD*分子态. 展开更多
关键词 ND体系 夸克模型 等效吸引 束缚态
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首次探测到双粲重子【I】cc^++ 预览
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作者 高原宁 《前沿科学》 2018年第1期37-40,共4页
2017年7月6日,欧洲核子研究中心大型强子对撞机底夸克探测器实验宣布发现双粲重子【I】cc^++,该粒子具有两个单位电荷,几乎是质子质量的4倍。该粒子由两个粲夸克和一个顸夸克组成,预期其内部结构迥异于以往发现的重子,为检验强... 2017年7月6日,欧洲核子研究中心大型强子对撞机底夸克探测器实验宣布发现双粲重子【I】cc^++,该粒子具有两个单位电荷,几乎是质子质量的4倍。该粒子由两个粲夸克和一个顸夸克组成,预期其内部结构迥异于以往发现的重子,为检验强相互作用的基本理论量子色动力学提供一个独特的标本. 展开更多
关键词 夸克模型 双粲重子 LHCb实验
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Exclusive Ω_(ccc)~(++)Ω_(ccc)~(--) Production from Z~0/r~* Decays
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作者 陈洪 平荣刚 《中国物理快报:英文版》 SCIE CAS CSCD 2018年第1期18-21,共4页
关键词 腐烂 生产 夸克模型 波色子
ρ meson impact parameter distributions
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作者 孙保东 董宇兵 《中国物理C:英文版》 SCIE CAS CSCD 2018年第6期37-43,共7页
关键词 参数分布 Ρ介子 GAUSSIAN 影响参数 夸克模型
Two-flavor hybrid stars with the Dyson-Schwinger quark model
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作者 魏金标 陈欢 H.J.Schulze 《中国物理C:英文版》 SCIE CAS CSCD 2017年第11期110-116,共7页
We study the properties of two-flavor quark matter in the Dyson-Schwinger model and investigate the possible consequences for hybrid neutron stars,with particular regard to the two-solar-mass limit.We find that with s... We study the properties of two-flavor quark matter in the Dyson-Schwinger model and investigate the possible consequences for hybrid neutron stars,with particular regard to the two-solar-mass limit.We find that with some extreme values of the model parameters,the mass fraction of two-flavor quark matter in heavy neutron stars can be as high as 30 percent and the possible energy release during the conversion from nucleonic neutron stars to hybrid stars can reach 10~(52) erg. 展开更多
关键词 味混合 夸克模型 DS 夸克物质 中子星 太阳质量 模型参数 转换过程
On the decays of d^*(2380) in a constituent chiral quark model
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作者 董宇兵 黄飞 +1 位作者 沈彭年 张宗烨 《中国物理C:英文版》 SCIE CAS CSCD 2017年第10期1-9,共9页
After summarizing the experimental results and present status of the d~*(2380) observed at WASA@COSY,two 'extreme' models for explaining its structure, a compact hexaquark dominated model and a loose ??'-D... After summarizing the experimental results and present status of the d~*(2380) observed at WASA@COSY,two 'extreme' models for explaining its structure, a compact hexaquark dominated model and a loose ??'-D_(12)π model, are briefly discussed, especially the former. By comparing their results with the corresponding data, the differences of the two models are addressed. As a remedy for the latter model, a mixing model and its result are also quoted for a comparison. It is shown that the compact hexaquark dominated structure might be more promising.However, the mixing model is also a possible structure, and more accurate Γ_(d~*)→NN_π data are needed for confirmation. 展开更多
关键词 夸克模型 衰变 手征 混合模型 补救方法 数据确认 紧凑型 结构
Spectra of charmed and bottom baryons with hyperfine interaction
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作者 王振洋 祁敬娟 +1 位作者 郭新恒 魏科伟 《中国物理C:英文版》 SCIE CAS CSCD 2017年第9期27-37,共11页
Up to now,the excited charmed and bottom baryon states have still not been well studied experimentally or theoretically.In this paper,we predict the mass of ?*b,the only L=0 baryon state which has not been observed,to... Up to now,the excited charmed and bottom baryon states have still not been well studied experimentally or theoretically.In this paper,we predict the mass of ?*b,the only L=0 baryon state which has not been observed,to be 6069.2 Me V.The spectra of charmed and bottom baryons with the orbital angular momentum L = 1 are studied in two popular constituent quark models,the Goldstone boson exchange(GBE) model and the one gluon exchange(OGE) hyperfine interaction model.Inserting the latest experimental data from the 'Review of Particle Physics',we find that in the GBE model,there exist some multiplets(Σc(b),Ξ c(b)and ?c(b)) in which the total spin of the three quarks in their lowest energy states is 3/2,but in the OGE model there is no such phenomenon.This is the most important difference between the GBE and OGE models.These results can be tested in the near future.We suggest more efforts to study the excited charmed and bottom baryons both theoretically and experimentally,not only for the abundance of baryon spectra,but also for determining which hyperfine interaction model best describes nature. 展开更多
关键词 超精细相互作用 重子态 底部 光谱 相互作用模型 夸克模型 实验数据 银杏叶提取物
夸克和弦模型中非奇异轻介子的类雷吉谱
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作者 郑斌斌 贾多杰 《原子核物理评论》 CSCD 北大核心 2017年第3期569-574,共6页
本工作重新考察了相对论弦模型和准相对论夸克模型中轻介子的类雷吉谱。基于辅助场技术,提出了非奇异轻介子的一个解析质量公式,由此推导出了一个准线性的Regge-Chew-Frautschi轨迹关系,并将此关系用相应介子的实验数据(PDG)进行了检... 本工作重新考察了相对论弦模型和准相对论夸克模型中轻介子的类雷吉谱。基于辅助场技术,提出了非奇异轻介子的一个解析质量公式,由此推导出了一个准线性的Regge-Chew-Frautschi轨迹关系,并将此关系用相应介子的实验数据(PDG)进行了检验。检验结果表明,和实验观测数据比较,夸克模型对介子质量的预言与弦模型的相符,但在角动量较大时,夸克模型的预言稍微优于弦模型。 展开更多
关键词 轻介子 雷吉轨迹 夸克模型 模型
新型重子 预览
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《光学精密机械》 2017年第3期1-2,共2页
欧洲核子研究中心大型强子对撞机(LHC)上的实验组宣布首次发现双粲重子。该发现由中国科学家主导。国际合作组已将研究论文提交至《物理评论快报》。LHCb中国组负责人,清华大学高原宁教授介绍道,按照夸克模型的分类,重子由三个夸... 欧洲核子研究中心大型强子对撞机(LHC)上的实验组宣布首次发现双粲重子。该发现由中国科学家主导。国际合作组已将研究论文提交至《物理评论快报》。LHCb中国组负责人,清华大学高原宁教授介绍道,按照夸克模型的分类,重子由三个夸克组成,熟知的质子和中子是最常见的重子。 展开更多
关键词 重子 欧洲核子研究中心 大型强子对撞机 中国科学家 夸克模型 研究论文 国际合作 清华大学
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Spectrum and Bethe-Salpeter amplitudes of Ω baryons from lattice QCD
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作者 梁剑 孙玮 +7 位作者 陈莹 邱伟峰 宫明 刘川 刘玉斌 刘朝峰 马建平 张剑波 《中国物理C:英文版》 SCIE CAS CSCD 2016年第4期1-7,共7页
The ? baryons with JP= 3/2±, 1/2± are studied on the lattice in the quenched approximation. Their mass levels are ordered as M3/2+< M(3/2- 0≈M1/2-< M1/2+, as is expected from the constituent quark mod... The ? baryons with JP= 3/2±, 1/2± are studied on the lattice in the quenched approximation. Their mass levels are ordered as M3/2+< M(3/2- 0≈M1/2-< M1/2+, as is expected from the constituent quark model. The mass values are also close to those of the four ? states observed in experiments. We calculate the Bethe-Salpeter amplitudes of ?(3/2+) and ?(1/2+) and find there is a radial node for the ?(1/2+) Bethe-Salpeter amplitude, which may imply that ?(1/2+) is an orbital excitation of ? baryons as a member of the(D, LNP) =(70, 02+) supermultiplet in the SU(6)O(3) quark model description. Our results are helpful for identifying the quantum numbers of experimentally observed ? states. 展开更多
关键词 格点QCD 重子 振幅 夸克模型 实验观察 模型描述 价值观 多重态
Mass spectra and Regge trajectories of ∧+ c, ∑0 c,[I]0c and Ω0 c baryons
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作者 Zalak Shah Kaushal Thakkar +1 位作者 Ajay Kumar Rai P. C. Vinodkumar 《中国物理C:英文版》 SCIE CAS CSCD 2016年第12期10-21,共12页
We calculate the mass spectra of the singly charmed baryons(A_c~+,∑_c~0,Ξ_c~0 and Ω_c~0) using the hypercentral constituent quark model(hCQM).The hyper color Coulomb plus linear potential is used to calculate the m... We calculate the mass spectra of the singly charmed baryons(A_c~+,∑_c~0,Ξ_c~0 and Ω_c~0) using the hypercentral constituent quark model(hCQM).The hyper color Coulomb plus linear potential is used to calculate the masses of positive(up to J~p=7~+/2) and negative(up to J~p=9~-/2) parity excited states.The spin-spin,spin-orbital and tensor interaction terms are also incorporated for mass spectra.We have compared our results with other theoretical and lattice QCD predictions for each baryon.Moreover,the known experimental results are also reasonably close to our predicted masses.By using the radial and orbital excitation,we construct Regge trajectories for the baryons in the(n,M~2) plane and find their slopes and intercepts.Other properties of these baryons,like magnetic moments,radiative transitions and radiative decay widths,are also calculated successfully. 展开更多
关键词 重子 自旋-轨道 质谱 电位计算 辐射跃迁 夸克模型 衰变宽度 质量谱
Stability of Quark Star Models
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作者 M.Azam S.A.Mardan M.A.Rehman 《理论物理通讯:英文版》 SCIE CAS CSCD 2016年第5期575-584,共10页
在这份报纸,我们与内部事配置的四种不同类型调查夸克星的稳定性;各向同性,收费各向同性,各向异性、控告由使用裂开的概念各向异性。为这个目的,我们象在涉及模型的物理参数上一样把本地密度不安技术用于静水力学的平衡方程。当内... 在这份报纸,我们与内部事配置的四种不同类型调查夸克星的稳定性;各向同性,收费各向同性,各向异性、控告由使用裂开的概念各向异性。为这个目的,我们象在涉及模型的物理参数上一样把本地密度不安技术用于静水力学的平衡方程。当内部事配置被改变,电磁的地被使用时,我们断定夸克星变得潜在地不稳定。 展开更多
关键词 夸克模型 稳定性 电各向异性 静力平衡方程 各向同性 扰动技术 局部密度 物理参数
Understanding the structure of d*(2380) in chiral quark model
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作者 Fei Huang PengNian Shen +1 位作者 YuBing Dong ZongYe Zhang 《中国科学:物理学、力学、天文学英文版》 SCIE EI CAS CSCD 2016年第2期40-48,共9页
The structure and decay properties of d~* have been detailedly investigated in both the chiral SU(3) quark model and the extended chiral SU(3) quark model that describe the energies of baryon ground states and the nuc... The structure and decay properties of d~* have been detailedly investigated in both the chiral SU(3) quark model and the extended chiral SU(3) quark model that describe the energies of baryon ground states and the nucleon-nucleon(NN) scattering data satisfactorily. By performing a dynamical coupled-channels study of the system of ?? and hidden-color channel(CC) with quantum numbers I(J~P) = 0(3~+) in the framework of the resonating group method(RGM), we find that the d~* has a mass of about 2.38-2.42 Ge V and a root-mean-square radius(RMS) of about 0.76-0.88 fm. The channel wave function is extracted by a projection of the RGM wave function onto the physical basis, and the fraction of CC component in the d~* is found to be about 66%-68%, which indicates that the d~* is a hexaquark-dominated exotic state. Based on this scenario the partial decay widths of d~*→dπ~0π~0and d~*→dπ~+π~- are further explicitly evaluated and the total width is then obtained by use of the branching ratios extracted from the measured cross sections of other possible decay channels. Both the mass and the decay width of d~* calculated in this work are compatible with the data(M≈2380 Me V, Γ≈70 Me V) reported by WASA-at-COSY Collaboration. 展开更多
关键词 夸克模型 手征 结构 SU(3) 三维 衰变宽度 核子-核子 共振群方法
The Ξ~* K and Ωη Interaction Within a Chiral Unitary Approach
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作者 徐思琦 谢聚军 +1 位作者 陈旭荣 贾多杰 《理论物理通讯:英文版》 SCIE CAS CSCD 2016年第1期53-56,共4页
In this work we study the interaction of the coupled channels ?η and Ξ* ˉK within the chiral unitary approach.The systems under consideration have total isospins 0,strangeness S =-3,and spin 3/2.We study the s wave... In this work we study the interaction of the coupled channels ?η and Ξ* ˉK within the chiral unitary approach.The systems under consideration have total isospins 0,strangeness S =-3,and spin 3/2.We study the s wave interaction which implies that the possible resonances generated in the system can have spin-parity JP= 3/2-.The unitary amplitudes in coupled channels develop poles that can be associated with some known baryonic resonances.We find there is a dynamically generated 3/2-? state with mass around 1800 Me V,which is in agreement with the predictions of the five-quark model. 展开更多
关键词 手性 耦合通道 相互作用 自旋宇称 同位素位移 动态生成 夸克模型 在系统
Observation of pentaquark states and prospectives of further studies
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作者 Cheng-Ping Shen Chang-Zheng Yuan 《中国科学通报:英文版》 SCIE CAS CSCD 2015年第17期1549-1550,共2页
<正>The quark model based on quark–antiquark mesons and three-quark baryons has been very successful in classifying the hadrons.However,quantum chromodynamics(QCD)does not forbid the existence of exotic hadroni... <正>The quark model based on quark–antiquark mesons and three-quark baryons has been very successful in classifying the hadrons.However,quantum chromodynamics(QCD)does not forbid the existence of exotic hadronic states with other quark–gluon configurations,such as glueballs(with 展开更多
关键词 夸克 夸克胶子结构 量子色动力学 强子态 夸克模型 夸克 QCD 杂交种
I=1/2 low-lying mesons in lattice QCD
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作者 傅子文 《中国物理C:英文版》 SCIE CAS CSCD 2015年第8期8-14,共7页
Using a conventional constituent-quark model,I=1/2 scalarκ,vector K*(892),and axial vector K1mesons are studied in the asqtad-improved staggered fermion with wall-source and point-sink interpolators.The mass ratio o... Using a conventional constituent-quark model,I=1/2 scalarκ,vector K*(892),and axial vector K1mesons are studied in the asqtad-improved staggered fermion with wall-source and point-sink interpolators.The mass ratio of mκ/mK*(892)is numerically confirmed to apparently vary with quark mass,and the experimental ordering mK*(892)>mκholds elegantly when the light u/d quark masses are sufficiently small,while the valence strange quark mass is fixed to its physical value.We also get reasonable signals for the K1 meson suggested by the SCALAR Collaboration from lattice QCD.The computations are conducted with the MILC Nf=3 flavor gauge configurations at three lattice spacings:a≈0.15,0.12,and 0.09 fm. 展开更多
关键词 格点QCD 介子 低洼 夸克质量 夸克模型 奇异夸克 MILC 轴矢量
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