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 strange particle 奇异粒子(4)
 奇异粒子
 Strange Particle Production in S+W Central Collisions S+W中心碰撞的奇异粒子产生 短句来源 Strange particle with mass m′>50m_p and composite state (q′,q~-′) 质量m′>50m_p的奇异粒子与(q′,q~-′)复合态 短句来源 One thinks that the strange particle with mass m′>50m p can be the composite particle ( q′,′) of leptoquark q′ and ′ . 我们认为 ,质量m′>5 0mp 的奇异粒子可能就是“轻子型夸允”q′和 q′的复合粒子 (q′ , q′) . 短句来源 THE PROPERTIES, PRODUCTION AND DECAY OF STRANGE PARTICLE 奇异粒子的性质及其产生和衰变 短句来源
 “strange particle”译为未确定词的双语例句
 Analysis for the Data of Singly Strange Particle Production in p + p,p + S and S+S Collisions at 200 A GeV Analysis　for　the　Data　of　Singly　Strange　Particle　Production　in　p＋p，p＋S　and　S＋S　Collisions　at　200　A　GeV 短句来源 In Chapter 4 after the net baryon density and the net strangeness density are given, chemical potentials of baryon and strange particle are reversely calculated by NIM. 第四章给定净重子密度和净奇异子密度，利用牛顿迭代法反求重子化学势和奇异子化学势，并分析它们之间的关系。 短句来源 Finally, the character of the hadronic component at different regions is studied. It is found that in three temperature regions which correspond to the AGS, SPS and RHIC energy region, respectively, the main hadronic component is baryon, strange particle and meson, respectively. 还研究了各种粒子成分随温度的变化,揭示出几个温度区间段对应AGS,SPS和RHIC 3 个能区,各区间中主要粒子成分分别为重子、奇异子和介子. 短句来源
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 THE PROPERTIES, PRODUCTION AND DECAY OF STRANGE PARTICLE 奇异粒子的性质及其产生和衰变 短句来源 Strange Particle Production in S+W Central Collisions S+W中心碰撞的奇异粒子产生 短句来源 STRANGE ATTRACTOR 奇异吸引子 短句来源 The Energy of the H-particle H粒子的能量 短句来源 particle size; 粒径大小;

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 strange particle
 Strange particle production in π N-collisions at high energies The incident energy is close to the threshold of strange particle production in free nucleon-nucleon collisions. We show that the leading-order (LO) event generator PYTHIA has to be tuned significantly to reproduce the STAR identified strange particle data. However, in order to describe identified strange particle spectra at NLO, knowledge of flavor separated FF is essential. STAR has measured a variety of strange particle species in p+p collisions at $\sqrt{s}$?=200?GeV. 更多
 Using the hypercharge-charge representation, leptonic decays of elementary particles are considered under the symmetry of the group B2. Baryons and mesons are assigned to the 4-dimensional representations of the group B2, then the 10-dimensional regular representation just contains all |△S|≤1 and |△Q|≤l baryonic currents or mesonic currents. Assumming that the weak interaction is mediated by intermediate bosons, and inserting them into the 10-dimensional representation of B2, we have calculated various... Using the hypercharge-charge representation, leptonic decays of elementary particles are considered under the symmetry of the group B2. Baryons and mesons are assigned to the 4-dimensional representations of the group B2, then the 10-dimensional regular representation just contains all |△S|≤1 and |△Q|≤l baryonic currents or mesonic currents. Assumming that the weak interaction is mediated by intermediate bosons, and inserting them into the 10-dimensional representation of B2, we have calculated various leptonic decay rates of strange particles which involve both △S = + △Q and △S = - △Q processes. The results here obtained are not in contradiction to present experimental data. 在超荷-电荷表象中应用B_2羣对称性讨论了基本粒子的轻子型衰变。将重子和介子分别填充在B_2羣的4维表示时,在10维(正则)表示中正好包含所有|ΔS|≤1和|ΔQ|≤1的重子流或介子流。假定弱相互作用由中间玻色子作媒介,并将它们纳入B_2羣的10维表示中,计算了包括ΔS=+ΔQ和ΔS=-ΔQ两类过程的各种奇异粒子轻子型衰变几率。结果与现有实验材料不矛盾。 In this paper we have discussed the SU3 and G2 transformation properties of the weak interactions. By assuming selection rules for certain operators in SU3 different from isospin, a series of relations between the amplitudes of the nonleptonic decays of the strange particles are obtained, which include some results obtained in previous works. Assuming the G2 symmetry of the strong interactions, we discuss the selection rules in these processes in a similar manner and show that the weak interactions cannot... In this paper we have discussed the SU3 and G2 transformation properties of the weak interactions. By assuming selection rules for certain operators in SU3 different from isospin, a series of relations between the amplitudes of the nonleptonic decays of the strange particles are obtained, which include some results obtained in previous works. Assuming the G2 symmetry of the strong interactions, we discuss the selection rules in these processes in a similar manner and show that the weak interactions cannot transform according the representations 7 or 14 of G2. 本文用SU_3和G_2羣讨论了奇异粒子非轻子衰变的弱作用的变换性质。若强作用是SU_3对称的,可引进类似于同位旋(T旋)的V旋和U旋,和T旋一起来表示奇子非轻子衰变的选择定则。求得了简单选择定则情况下各个衰变过程的关系,其中包含了前人的结果而避免引用过多的假设。若强作用是G_2对称的,可引进包含同位旋在内的六种“旋”来给出选择定则。根据这些定则求得若干衰变过程的关系。证明了弱作用不能按G_2羣的七维或十四维表示变换。 In this paper a unified electro-weak model for leptons based on the SU(3) gaugegroup is suggested by means of four kinds of realization for the generators of thegroup. For all low energy electro-weak processes, this model predicts the same resultsas the conventional Weinberg-Salam model does. The Weinberg angle is shown to besin~2θ_w=1/4 in a natural way. When the Higgs self potential respects a discrete symme-try Φ→-Φ, a new conserved quantum number called weak strangeness emerges fromthe model after spontaneous... In this paper a unified electro-weak model for leptons based on the SU(3) gaugegroup is suggested by means of four kinds of realization for the generators of thegroup. For all low energy electro-weak processes, this model predicts the same resultsas the conventional Weinberg-Salam model does. The Weinberg angle is shown to besin~2θ_w=1/4 in a natural way. When the Higgs self potential respects a discrete symme-try Φ→-Φ, a new conserved quantum number called weak strangeness emerges fromthe model after spontaneous symmetry breaking. In the present model there existanother four heavy vector gauge bosons V~± and U~(±±) together with some heavyfermions and Higgs scalars, which have non vanishing weak strangeness quantumnumbers. These weak strange particles have no direct couplings with leptons. Theirexistence will not influence the low energy electro-weak processes. Nevertheless, theycan be produced in pairs in high energy collisions and the lightest of them should bestable if the conservation of weak strangeness is exact. The experimental implicationsand the possibility of violation of the conservation of weak strangeness are also dis-cussed. 本文借助于SU(3)群生成元四种不同的实现,建立了一个以SU(3)规范群为基础的弱电统一模型,得到W~±粒子和Z粒子的质量以及它们与轻子的相互作用都与Weinberg-Salam模型的结果相同,并且给出sin~2θ_w=1/4。这个模型要求有一个新的守恒量子数——弱奇异数存在,还存在四个重矢量粒子V~±和U~(±±)和一些重费米子以及标量粒子。它们都带有不为零的弱奇异数,都和轻子不直接耦合。它们的存在不影响低能范围内轻子的弱电作用,并且只能在高能下成对产生。它们中最轻的粒子将是稳定粒子。本文还讨论了弱奇异数守恒破坏的可能性及其后果。 << 更多相关文摘
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