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An Original Didactic about Standard Model (Geometric Model of Particle: The Quarks)
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作者 Giovanni Guido Abele Bianchi Gianluigi Filippelli 《Journal of High Energy Physics, Gravitation and Cosmology》 CAS 2024年第2期854-874,共21页
This work shows a didactic model representative of the quarks described in the Standard Model (SM). In the model, particles are represented by structures corresponding to geometric shapes of coupled quantum oscillator... This work shows a didactic model representative of the quarks described in the Standard Model (SM). In the model, particles are represented by structures corresponding to geometric shapes of coupled quantum oscillators (GMP). From these didactic hypotheses emerges an in-depth phenomenology of particles (quarks) fully compatible with that of SM, showing, besides, that the number of possible quarks is six. 展开更多
关键词 Golden Particle quark Sub-Oscillator Semi-Quanta IQuO Geometric Structure Golden Number Massive Coupling INTERPENETRATION IQuO PION MESON
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Gravitational wave echoes from strange quark stars in the equation of state with density-dependent quark masses
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作者 Jian‑Feng Xu Lei Cui +2 位作者 Zhen‑Yan Lu Cheng‑Jun Xia Guang‑Xiong Peng 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2023年第11期112-119,共8页
According to the recent studies,the gravitational wave(GW)echoes are expected to be generated by quark stars composed of ultrastiff quark matter.The ultrastiff equations of state(EOS)for quark matter were usually obta... According to the recent studies,the gravitational wave(GW)echoes are expected to be generated by quark stars composed of ultrastiff quark matter.The ultrastiff equations of state(EOS)for quark matter were usually obtained either by a simple bag model with artificially assigned sound velocity or by employing interacting strange quark matter(SQM)depicted by simple reparameterization and rescaling.In this study,we investigate GW echoes with EOSs for SQM in the framework of the equivparticle model with density-dependent quark masses and pairing effects.We conclude that strange quark stars(SQSs)can be sufficiently compact to possess a photon sphere capable of generating GW echoes with frequencies in the range of approximately 20 kHz.However,SQSs cannot account for the observed 72 Hz signal in GW170817 event.Furthermore,we determined that quark-pairing effects play a crucial role in enabling SQSs to satisfy the necessary conditions for producing these types of echoes. 展开更多
关键词 Strange quark star Gravitational wave echoes Color-flavour-locked phase Strange quark matter
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Structure of the Quarks and a New Model of Protons and Neutrons: Answer to Some Open Questions
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作者 Ágnes Cziráki 《Natural Science》 CAS 2023年第1期11-18,共8页
The described structural model tries to answer some open questions such as: Why do quarks not exist in the open state? Where are the antiparticles from the Big Bang?
关键词 Structure of quarks New Model PROTON Neutron Open Questions
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Mass of the Universe from Quarks: A Plausible Solution to the Cosmological Constant Problem
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作者 Kevin Oramah 《Journal of Modern Physics》 2023年第12期1672-1692,共21页
A framework to estimate the mass of the universe from quarks is presented, taking spacetime into account. This is a link currently missing in our understanding of physics/science. The focus on mass-energy balance is a... A framework to estimate the mass of the universe from quarks is presented, taking spacetime into account. This is a link currently missing in our understanding of physics/science. The focus on mass-energy balance is aimed at finding a solution to the Cosmological Constant (CC) problem by attempting to quantize space-time and linking the vacuum energy density at the beginning of the universe and the current energy density. The CC problem is the famous disagreement of approximately 120 orders of magnitude between the theoretical energy density at the Planck scale and the indirectly measured cosmological energy density. Same framework is also used to determine the mass of the proton and neutron from first principles. The only input is the up quark (u-quark) mass, or precisely, the 1st generation quarks. The method assumes that the u-quark is twice as massive as the down-quark (d-quark). The gap equation is the starting point, introduced in its simplest form. The main idea is to assume that all the particles and fields in the unit universe are divided into quarks and everything else. Everything else means all fields and forces present in the universe. It is assumed that everything else can be “quark-quantized”;that is, assume that they can be quantized into similar sizeable u-quarks and/or it’s associated interactions and relations. The result is surprisingly almost as measured and known values. The proton structure and mass composition are also analysed, showing that it likely has more than 3 quarks and more than 3 valence quarks. It is also possible to estimate the percentage of dark matter, dark energy, ordinary matter, and anti-matter. Finally, the cosmological constant problem or puzzle is resolved by connecting the vacuum energy density of Quantum Field Theory (5.1E+96 kg/m<sup>3</sup>) and the energy density of General Relativity (1.04E−26 kg/m<sup>3</sup>). Upon maturation, this framework can serve as a bridging platform between Quantum Field Theory and General Relativity. Other aspects of natures’ field theories can be successfully ported to the platform. It also increases the chances of solving some of the unanswered questions in physics. 展开更多
关键词 Cosmological Constant Proton Mass-Structure quark-Quantization Dark Matter Dark Energy Age of the Universe Energy Density Spacetime Quantization
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An experimental review of open heavy flavor and quarkonium production at RHIC 被引量:5
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作者 Ze-Bo Tang Wang-Mei Zha Yi-Fei Zhang 《Nuclear Science and Techniques》 SCIE CAS CSCD 2020年第8期72-103,共32页
Open heavy flavors and quarkonia are unique probes of the hot–dense medium produced in heavy-ion collisions. Their production in p+p collisions also constitutes an important test of QCD. In this paper, we review sele... Open heavy flavors and quarkonia are unique probes of the hot–dense medium produced in heavy-ion collisions. Their production in p+p collisions also constitutes an important test of QCD. In this paper, we review selected results on the open heavy flavors and quarkonia generated in the p+p and heavy-ion collisions at the Relativistic Heavy Ion Collider. The physical implications are also discussed. 展开更多
关键词 Heavy flavor Heavy quark quarkONIUM quark–gluon plasma Heavy-ion collisions QCD
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Higgs-Like Mechanism by Confinement of Quarks in a Chemical Non-Equilibrium Model 被引量:1
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作者 Leif Matsson 《World Journal of Mechanics》 2016年第11期441-455,共16页
A chemical non-equilibrium equation for binding of massless quarks to antiquarks, combined with the spatial correlations occurring in the condensation process, yields a density dependent form of the double-well potent... A chemical non-equilibrium equation for binding of massless quarks to antiquarks, combined with the spatial correlations occurring in the condensation process, yields a density dependent form of the double-well potential in the electroweak theory. The Higgs boson acquires mass, valence quarks emerge and antiparticles become suppressed when the system relaxes and symmetry breaks down. The hitherto unknown dimensionless coupling parameter to the superconductor-like potential becomes a re-gulator of the quark-antiquark asymmetry. Only a small amount of quarks become “visible”—the valence quarks, which are 13% of the total sum of all quarks and antiquarks—suggesting that the quarks-antiquark pair components of the becoming quark-antiquark sea play the role of dark matter. When quark-masses are in-weighted, this number approaches the observed ratio between ordinary matter and the sum of ordinary and dark matter. The model also provides a chemical non-equilibrium explanation for the information loss in black holes, such as of baryon number. 展开更多
关键词 Confinement of quarks Higgs Mechanism Emergence of Mass Dark Matter Valence quarks Antiquark Suppression Black Holes Dark Energy
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凝乳酶对超滤浓缩乳生产Quark干酪的影响 被引量:4
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作者 刘忠成 刘艳平 霍贵成 《食品工业科技》 CAS CSCD 北大核心 2009年第12期120-122,共3页
采用每100g超滤乳中添加0、50、100、150、200、250μL六个水平的凝乳酶,研究了不同的凝乳酶添加量对Quark干酪组成、凝乳硬度、贮藏期产品感官品质和干酪中水溶性氮含量的影响。结果表明,当凝乳酶的添加量从0μL/100g增大到250μL/100g... 采用每100g超滤乳中添加0、50、100、150、200、250μL六个水平的凝乳酶,研究了不同的凝乳酶添加量对Quark干酪组成、凝乳硬度、贮藏期产品感官品质和干酪中水溶性氮含量的影响。结果表明,当凝乳酶的添加量从0μL/100g增大到250μL/100g时,产品的水分含量上升了1·49%,粗产率和校正产率分别上升了1·42%和0·99%,固形物的回收率下降了3·5%,凝乳硬度从16·83g增大到40·84g,但干酪的苦味和水溶性氮含量,随着贮存期的延长和凝乳酶用量的增加而增大。 展开更多
关键词 凝乳酶 超滤 quark干酪
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质谱技术联用分析Quark干酪水溶性多肽组成 被引量:1
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作者 焦晶凯 刘振民 +5 位作者 莫蓓红 郑远荣 石春权 于华宁 朱培 孙颜君 《食品与发酵工业》 CAS CSCD 北大核心 2016年第3期188-192,共5页
通过质谱技术联用分析了自制Quark干酪中水溶性多肽的组成,测定了干酪的理化指标及其多肽和蛋白的一级结构,结果显示:干酪涂抹性良好,质谱联用检测到62种蛋白和223条多肽,蛋白主要有K-酪蛋白、β-酪蛋白、α-s1-酪蛋白、β-乳球蛋白等,... 通过质谱技术联用分析了自制Quark干酪中水溶性多肽的组成,测定了干酪的理化指标及其多肽和蛋白的一级结构,结果显示:干酪涂抹性良好,质谱联用检测到62种蛋白和223条多肽,蛋白主要有K-酪蛋白、β-酪蛋白、α-s1-酪蛋白、β-乳球蛋白等,优势肽段主要来自于这些蛋白,此外,大多数多肽序列与功能性活性多肽相近或相关。 展开更多
关键词 quark干酪 多肽 质谱 液相色谱-质谱联用(LC-MS)
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Possible Modular Structure of Matter Based on the “YY Model” Approach —An Overview of the Construction Rules for Quarks and Atomic Nuclei with Configurative Examples for Neutron, Proton, Deuteron and Dineutron
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作者 Hongguang Yang Weidong Yang 《Journal of Modern Physics》 2022年第2期225-255,共31页
The newly developed YY model contains a set of constitutive rules to describe the structures of atomic nuclei and subatomic particles, by using two elementary sub-quark particles, the Yin and Yang fermions of charge 1... The newly developed YY model contains a set of constitutive rules to describe the structures of atomic nuclei and subatomic particles, by using two elementary sub-quark particles, the Yin and Yang fermions of charge 1/3 forming all the particles of the Standard Model. This model suggests a modular structure of the universe, in which two elementary constituents recursively form all the matter. The advantage of this hypothesis is that it provides a total symmetry and a noticeably clear conceptual understanding. Moreover, it justifies the cosmological formation of a limited number of atoms, e.g., H and Li with their isotopes, considering that matter can be produced as a free agglomerate of semi-stable neutrons, which would lead to the feeding of baryonic matter in the universe. In this current article, some further theoretical aspects are proposed as an evolution of the YY model. They cover correlation paths between interacting quarks, the considerations of color forces between yin-yang elementary elements. Moreover, an agreement of the YY model with the Teplov approach based on harmonic quarks and oscillators is established, and the mass of Yin and Yang is considered. Two example nuclei are used for the analysis: a radioactively stable deuteron (containing a neutron and a proton) and a possible semi-stable dineutron (roughly “consisting of two neutrons”), which is purely theoretical, represent a very natural and legal nuclear state within YY model. Based on the results obtained here, some indications are given for a possible simple experimental verification providing proof for the stability or instability of the dineutron. 展开更多
关键词 YY Model Approach Color Confinement Aggregate State CCAS quark Correlation Path Color Forces Constituent quarks Harmonic Oscillator Harmonic quark Mass
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低功耗AVR微处理器上Quark哈希算法优化实现
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作者 温雅敏 黎凤霞 +1 位作者 龚征 唐韶华 《计算机工程与应用》 CSCD 2014年第23期104-107,共4页
哈希算法被广泛用于数据完整性检测。在物联网数据完整性检测中,现有标准哈希算法的软硬件开销仍需进一步降低。从低功耗AVR微处理器的特点出发,通过基于字节的压缩函数变换操作和基于布尔运算特点的函数优化,以AVR ASM为开发语言环境... 哈希算法被广泛用于数据完整性检测。在物联网数据完整性检测中,现有标准哈希算法的软硬件开销仍需进一步降低。从低功耗AVR微处理器的特点出发,通过基于字节的压缩函数变换操作和基于布尔运算特点的函数优化,以AVR ASM为开发语言环境给出了Quark哈希算法的优化实现,在算法实现的处理速度和存储开销上取得较好的平衡。 展开更多
关键词 密码学算法 轻量级哈希函数 quark ATtiny
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Quark打通端到端的物联网战略布局——专访英特尔物联网解决方案与产品事业部中国区总经理陈伟 被引量:1
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作者 李健 《电子产品世界》 2014年第6期1-2,共2页
过去的一两年,英特尔除了在智能手机方面加大投入之外,最大的企业变化就是全面向物联网方向拓展,先是整合之前的嵌入式系统部门和其他资源成立全新的物联网解决方案与产品事业部,随后又推出了完全不同于之前产品的Quark处理器,瞄准全新... 过去的一两年,英特尔除了在智能手机方面加大投入之外,最大的企业变化就是全面向物联网方向拓展,先是整合之前的嵌入式系统部门和其他资源成立全新的物联网解决方案与产品事业部,随后又推出了完全不同于之前产品的Quark处理器,瞄准全新的市场应用,并向竞争对手ARM的产品发起挑战。我们特别专访了英特尔物联网解决方案与产品事业部中国区总经理陈伟,探讨英特尔这家半导体巨头的物联网战略布局。 展开更多
关键词 quark 物联网 英特尔 总经理 产品 事业 中国 端到端
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A New Quantum Number Triangular Array That Defines the Internal Organization of Valence Quarks, the Hadron Quark Model, and the CKM Matrix 被引量:1
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作者 Donald William Chakeres Richard Vento 《Journal of Modern Physics》 2016年第1期145-155,共11页
Purpose: The Harmonic Neutron Hypothesis, HNH, has demonstrated that many of the fundamental physical constants, including the quarks, are associated with partial harmonic fractional exponents, , of a fundamental freq... Purpose: The Harmonic Neutron Hypothesis, HNH, has demonstrated that many of the fundamental physical constants, including the quarks, are associated with partial harmonic fractional exponents, , of a fundamental frequency, v<sub>F</sub>. The model has shown that the properties of the quarks are based on a progression of prime number composites. They also fall on three separate power law lines related to integer factors of the Y-intercept, , of a fundamental electromagnetic line which is scaled by the Rydberg constant, R and Planck’s constant. The quark lines are scaled by the quantum number factors {1, 2, 3}, and their Y-intercepts are referred to as n<sub>bem</sub>. The goal is to present a new proto-quark model in a six-quark inverted triangular array that defines the global organization of the valence quarks, which determines the hadronic quantum numbers, the standard hadron quark model, and the Cabibbo-Kobayashi-Maskawa (CKM) matrix. Methods: The charm, bottom, top quarks are associated with power law line Y-intercept, n<sub>bem</sub> equal to 1;the strange and down quarks with n<sub>bem</sub> equal to 2;and the up quark with n<sub>bem</sub> equal to 3. An inverted equilateral triangular array with three rows arranged from upper row (triangle base) to bottom row (triangle vertex), is associated respectively with n<sub>bem</sub> numbers 1, 2, and 3. The novelty of our perspective thus defines a new global valence quark organization which supersedes the Standard hadron composite quark model. The quarks are ordered via relative mass, partial fractions, and n<sub>bem</sub> quantum number. The top row of our inverted triangle includes the c, b, and t quarks from left to right;the middle row depicts the d and s quarks;and the bottom row, the up quark. Results: Our array depicts a quantum generator of the global organization of the valence quarks defining the composite quark model. The vertices of the triangular array are the up quarks, the midpoints are the down quarks. All weak transitions are from a corner to a midpoint or vice versa. The standard 3 by 3 CKM matrix is generated from the new quark triangle with each up type quark (u, c, and t) transforming to each down type (d, s, and b), with their experimental flavor transition magnitudes given. Conclusion: A new quark quantum number, n<sub>bem</sub>, is an important discovery that generates a new proto-valence quark triangle that secondarily generates the composite quark model and the CKM matrix. 展开更多
关键词 quarkS quark Model NEUTRON Cabibbo-Kobayashi-Maskawa Matrix Fundamental Physical Constants Fundamental Particles Unification Models
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The Integer-Fraction Principle of the Digital Electric Charge for Quarks and Quasiparticles 被引量:1
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作者 Ding-Yu Chung 《Journal of Modern Physics》 2016年第10期1150-1159,共10页
In the integer-fraction principle of the digital electric charge, individual integral charge and individual fractional charge are the digital representations of the allowance and the disallowance of irreversible kinet... In the integer-fraction principle of the digital electric charge, individual integral charge and individual fractional charge are the digital representations of the allowance and the disallowance of irreversible kinetic energy, respectively. The disallowance of irreversible kinetic energy for individual fractional charge brings about the confinement of individual fractional charges to restrict irreversible movement resulted from irreversible kinetic energy. Collective fractional charges are confined by the short-distance confinement force field where the sum of the collective fractional charges is integer. As a result, fractional charges are confined and collective. The confinement force field includes gluons in QCD (quantum chromodynamics) for collective fractional charge quarks in hadrons and the magnetic flux quanta for collective fractional charge quasiparticles in the fractional quantum Hall effect (FQHE). The collectivity of fractional charges requires the attachment of energy as flux quanta to bind collective fractional charges. The integer-fraction transformation from integral charges to fractional charges consists of the three steps: 1) the attachment of an even number of flux quanta to individual integral charge fermions to form individual integral charge composite fermions, 2) the attachment of an odd number of flux quanta to individual integral charge composite fermions to form transitional collective integral charge composite bosons, and 3) the conversion of flux quanta into the confinement force field to confine collective fractional charge composite fermions converted from composite bosons. The charges of quarks are fractional, because QCD (the strong force) emerges in the universe that has no irreversible kinetic energy. Kinetic energy emerged in the universe after the emergence of the strong force. The charges of the quasiparticles in the FQHE are fractional because of the confinement by a two-dimensional system, the Landau levels, and an extremely low temperature and the collectivity by high energy magnetic flux quanta. From the integer-fraction transformation from integral charge electrons to fractional charge quarks, the calculated masses of pion, muon and constituent quarks are in excellent agreement with the observed values. 展开更多
关键词 Electric Charge Integral Charge Fractional Charge quarkS Kinetic Energy Confinement The Fractional Quantum Hall Effect The Theory of Everything The Masses of quarks The Mass of Muon The Mass of Pion COSMOLOGY
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χ<sub>c</sub>and χ<sub>b</sub>States in Hot Quark-Gluon Plasma
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作者 Binoy Krishna Patra Lata Devi +2 位作者 Uttam Kakade Vineet Agotiya Vinod Chandra 《Journal of Modern Physics》 2012年第6期483-491,共9页
We have studied the dissociation phenomenon of 1p states (χc and χb) of the charmonium and bottomonium spectra in a hot QCD medium. This study employed a medium modified heavy quark potential encoding the medium eff... We have studied the dissociation phenomenon of 1p states (χc and χb) of the charmonium and bottomonium spectra in a hot QCD medium. This study employed a medium modified heavy quark potential encoding the medium effects in the dielectric function to the full Cornell potential. The medium modified potential has a quite different form in the sense that it has a long range Coulomb tail in addition to the usual Yukawa term even above the deconfinement temperature. We further study the flavor dependence of their binding energies and explore the nature of dissociation by employing the perturbative, non-perturbative, and the lattice parametrized form of the Debye masses in the medium-modified potential. Interestingly, perturbative result of the Debye mass predicts the dissociation temperatures closer to the results obtained in lattice correlator studies whereas the lattice parametrized form of the Debye masses gives the results closer to the current theoretical works based on potential studies. 展开更多
关键词 quarkONIUM DEBYE Mass Medium-Modified Heavy quark Potential Binding Energy DISSOCIATION Temperature
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An Explanation for the Violation of Lepton Universality in Beauty-Quark Decays: The Binary Isotope Mixture of Beauty-Quarks
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作者 Ding-Yu Chung 《Journal of Modern Physics》 2021年第7期971-982,共12页
This paper purposes an explanation for the recent evidence for the violation of lepton universality in beauty-quark decays at CERN’s Large Hadron Collider. A beauty meson (B<sup>+</sup>) transforms into a... This paper purposes an explanation for the recent evidence for the violation of lepton universality in beauty-quark decays at CERN’s Large Hadron Collider. A beauty meson (B<sup>+</sup>) transforms into a strange meson (K<sup>+</sup>) with the emission of either electron-positron (e<sup>+</sup>e<sup>-</sup>) or muon-antimuon (<span style="white-space:nowrap;"><em>μ</em></span><sup>+</sup><em>μ</em><sup>-</sup>). The ratio (<em>R</em><sub>K</sub>) of branching fractions for B<sup>+ </sup><span style="white-space:nowrap;">→</span> K<sup>+</sup><em>μ</em><sup>+</sup><em>μ</em><sup>- </sup>and B<sup>+</sup><span style="white-space:nowrap;">→</span> K<sup>+</sup>e<sup>+</sup>e<sup>-</sup> decays is measured to be <em>R</em><sub>K</sub> = 0.846 instead of 1 in the violation of lepton universality in the Standard Model. This paper proposes that the violation is derived from the binary isotope mixture of two beauty-quarks, b<sub>7</sub> (4979 MeV mass) and b<sub>8</sub> (143,258 MeV mass) whose masses are calculated from the periodic table of elementary particles. b<sub>7</sub> is the observable B, while b<sub>8</sub> is the hidden B to preserve the generation number symmetry between the three lepton family generations and the three quark family generations in the Standard Model. The preservation of the generation number symmetry forbids b<sub>8</sub> to decay into K<sup>+</sup><em>μ</em><sup>+</sup><em>μ</em><sup>-</sup>. In the transition state involving the virtual particles (<span style="white-space:nowrap;"><em>γ</em></span>, W± and Z<span style="white-space:nowrap;">°</span>) before the decay, b<sub>7</sub> and b<sub>8</sub> emerge to form the binary isotope mixture from B. The rates of emergence as the rates of diffuse in Graham’s law of diffusion are proportional to inverse square root of mass. The rate ratio between b<sub>8</sub>/b<sub>7</sub> is (4979/143,258)<sup>1/2</sup> = 0.1864. Since b<sub>7</sub> decays into K<sup>+</sup>, e<sup>+</sup>e<sup>-</sup>, and <em>μ</em><sup>+</sup><em>μ</em><sup>-</sup>, while b<sub>8</sub> decays into K<sup>+</sup>, e<sup>+</sup>e<sup>-</sup>, and forbidden <em>μ</em><sup>+</sup><em>μ</em><sup>-</sup>, the calculated ratio (RK) of branching fractions for B<sup>+</sup><span style="white-space:nowrap;">→</span> K<sup>+</sup><em>μ</em><sup>+</sup><em>μ</em><sup>-</sup> and B<sup>+</sup><span style="white-space:nowrap;">→</span> K<sup>+</sup>e<sup>+</sup>e<sup>- </sup>is 0.5/(0.1864 × 0.5+ 0.5) = 0.843 in excellent agreement with the observed 0.846. The agreement between the calculated RK and the observed RK confirms the validity of the periodic table of elementary particles which provides the answers for the dominance of matter over antimatter, dark-matter, and the mass hierarchy of elementary particles. 展开更多
关键词 Beauty-quark Decays Violation of Lepton Universality Periodic Table of Elementary Particles Binary Isotope Mixture of Beauty-quarks Ratio of Branching Fractions Dark Matter Dominance of Matter over Antimatter
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Tetraquark and Pentaquark Systems in Lattice QCD
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作者 Fumiko Okiharu Takumi Doi +5 位作者 Hiroko Ichie Hideaki Iida Noriyoshi Ishii Makoto Oka Hideo Suganuma Toru T. Takahashi 《Journal of Modern Physics》 2016年第8期774-789,共16页
We study multi-quark systems in lattice QCD. First, we revisit and summarize our accurate mass measurements of low-lying 5Q states with J = 1/2 and I = 0 in both positive- and negative-parity channels in anisotropic l... We study multi-quark systems in lattice QCD. First, we revisit and summarize our accurate mass measurements of low-lying 5Q states with J = 1/2 and I = 0 in both positive- and negative-parity channels in anisotropic lattice QCD. The lowest positive-parity 5Q state is found to have a large mass of about 2.24 GeV after the chiral extrapolation. To single out the compact 5Q state from NK scattering states, we use the hybrid boundary condition (HBC), and find no evidence of the compact 5Q state below 1.75 GeV in the negative-parity channel. Second, we study the multi-quark potential in lattice QCD to clarify the inter-quark interaction in multi-quark systems. The 5Q potential V<sub>5Q</sub> for the QQ--QQ system is found to be well described by the “OGE Coulomb plus multi-Y Ansatz”: The sum of the one-gluon-exchange (OGE) Coulomb term and the multi-Y-type linear term based on the flux-tube picture. The 4Q potential V<sub>4Q</sub> for the QQ- system is also described by the OGE Coulomb plus multi-Y Ansatz, when QQ and are well separated. The 4Q system is described as a “two-meson” state with disconnected flux tubes, when the nearest quark and antiquark pair are spatially close. We observe a lattice-QCD evidence for the “flip-flop”, i.e., the fluxtube recombination between the connected 4Q state and the “two-meson” state. On the confinement mechanism, the lattice QCD results indicate the flux-tube-type linear confinement in multi-quark hadrons. Finally, we propose a proper quark-model Hamiltonian based on the lattice QCD results. 展开更多
关键词 Lattice QCD Multi-quarks quark Confinement Exotic Hadrons
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Dynamical Running Mass of Quark in the Dyson-Schwinger Equation Approach 被引量:1
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作者 MA Wei-Xing SHEN Peng-Nian ZHOU Li-Juan 《Communications in Theoretical Physics》 SCIE CAS CSCD 2002年第11期571-576,共6页
Based on the Dyson-Schwinger equations of QCD in the "rainbow" approximation, the fully dressed quarkpropagator Sf(p) is investigated, and then an algebraic parametrization form of the propagator is obtained... Based on the Dyson-Schwinger equations of QCD in the "rainbow" approximation, the fully dressed quarkpropagator Sf(p) is investigated, and then an algebraic parametrization form of the propagator is obtained as a solutionof the equations. The dressed quark amplitudes Af and Bf built up the fully dressed quark propagator and the dynamicalrunning masses Mf defined by Af and Bf for light quarks u, d and s are calculated, respectively. Using the predictedrunning masses Mf, quark condensates <0|q(0)q(0)|0> = -(0.255 GeV)a for u, d quarks, and <0|s s|0> = 0.8<0|q(0)q(0)]0)for s quark, and experimental pion decay constant fπ = 0.093 GeV, the masses of Goldstone bosons K, π, and η are alsoevaluated. The numerical results show that the masses of quarks are dependent on their momentum p2. The fully dressedquark amplitudes Af and Bf have correct behaviors which can be used for many purposes in our future researches onnonperturbative QCD. 展开更多
关键词 Dyson-Schwinger equations quark propagator quark mass the MASSES of Goldstone BOSONS
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Bulk viscosity of interacting magnetized strange quark matter 被引量:2
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作者 Jian-Feng Xu 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2021年第10期101-109,共9页
The bulk viscosity of interacting strange quark matter in a strong external magnetic field B m with a real equation of state is investigated.It is found that interquark interactions can significantly increase the bulk... The bulk viscosity of interacting strange quark matter in a strong external magnetic field B m with a real equation of state is investigated.It is found that interquark interactions can significantly increase the bulk viscosity,and the magnetic field B_(m) can cause irregular oscillations in both components of the bulk viscosity,ξ||(parallel to B_(m))and ξ⊥(perpendicular to B_(m)).A comparison with non-interacting strange quark matter reveals that when B_(m) is sufficiently large,ξ⊥is more affected by interactions than ξ||.Additionally,the quasi-oscillation of the bulk viscosity with changes in density may facilitate the for-mation of magnetic domains.Moreover,the resulting r-mode instability windows are in good agreement with observational data for compact stars in low-mass X-ray binaries.Specifically,the r-mode instability window for interacting strange quark matter in high magnetic fields has a minimum rotation frequency exceeding 1050 Hz,which may explain the observed very high spin frequency of a pulsar with V=1122 Hz. 展开更多
关键词 Strange quark matter Bulk viscosity Strong magnetic field Strange star R-mode instability window
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Symmetry energy of strange quark matter and tidal deformability of strange quark stars 被引量:1
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作者 Jian-Feng Xu Cheng-Jun Xia +2 位作者 Zhen-Yan Lu Guang-Xiong Peng Ya-Peng Zhao 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2022年第11期89-100,共12页
Research performed during the past decade revealed an important role of symmetry energy in the equation of state(EOS)of strange quark matter(SQM).By introducing an isospin-dependent term into the quark mass scaling,th... Research performed during the past decade revealed an important role of symmetry energy in the equation of state(EOS)of strange quark matter(SQM).By introducing an isospin-dependent term into the quark mass scaling,the SQM stability window in the equivparticle model was studied.The results show that a sufficiently strong isospin dependence C_(I)can significantly widen the SQM region of absolute stability,yielding results that simultaneously satisfy the constraints of the astrophysical observations of PSR J1614-2230 with 1.928±0.017 Mand tidal deformability 70≤Λ_(1:4)≤580 measured in the event GW170817.With increasing C_(I),the difference between the u,d,and s quark fractions for the SQM inβ-equilibrium becomes inconspicuous for C>0,leading to small isospin asymmetryδ,and further resulting in similar EOS and structures of strange quark stars(SQSs).Moreover,unlike the behavior of the maximum mass of ud QSs,which varies with C_(I)depending on the sign of the parameter C,the maximum mass of the SQSs decreases monotonously with increasing CI. 展开更多
关键词 Symmetry energy Strange quark matter Strange stars Tidal deformability
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TOP QUARK MASS AND THE FOURTH GENERATION OF QUARK 被引量:1
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作者 CHOU Kuang-chao WU Yue-liang XIE Yan-bo 《Chinese Physics Letters》 SCIE CAS 1984年第2期47-48,共2页
To explain CP violation in Kaon system in the light of the recently measured b - lifetime within the framework of three generations of quarks, the top quark mass has to be greater than 50GeV if the current algebra val... To explain CP violation in Kaon system in the light of the recently measured b - lifetime within the framework of three generations of quarks, the top quark mass has to be greater than 50GeV if the current algebra value of the factor BK is adopted and | ε’/ε|< 0.01. In this letter a fourth generation of quark is considered which can fit the present experimental data on CP violation, and KL→ μ ^(+) μ^(- )decay rate for top quark mass is around 40GeV. The mass of the new charge 2/3 quark is predicted to be over 100Gev. 展开更多
关键词 quark ALGEBRA LETTER
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