Content of THE PHYSICS OF ELEMENTARY PARTICLES AND FIELDS in our journal

Published in last 1 year |  In last 2 years |  In last 3 years |  All Please wait a minute... For selected: Download citations EndNote Ris BibTeX Toggle thumbnails Select Arbitrary direction incident Gaussian beam scattering by multispheres Li Zheng-Jun(李正军), Wu Zhen-Sen(吴振森), Li Huan(李焕), and Li Hai-Ying(李海英) Chin. Phys. B, 2011, 20 (8): 081101.   DOI: 10.1088/1674-1056/20/8/081101 Abstract （1430）      PDF （528KB）（1163）       Knowledge map    Based on spherical vector wave functions and their coordinate rotation theory, the field of a Gaussian beam in terms of the spherical vector wave functions in an arbitrary unparallel Cartesian coordinate system is expanded. The beam shape coefficient and its convergence property are discussed in detail. Scattering of an arbitrary direction Gaussian beam by multiple homogeneous isotropic spheres is investigated. The effects of beam waist width, sphere separation distance, sphere number, beam centre positioning, and incident angle for a Gaussian beam with two polarization modes incident on various shaped sphere clusters are numerically studied. Moreover, the scattering characteristics of two kinds of shaped red blood cells illuminated by an arbitrary direction incident Gaussian beam with two polarization modes are investigated. Our results are expected to provide useful insights into particle sizing and the measurement of the scattering characteristics of blood corpuscle particles with laser diagnostic techniques. Select Low frequency asymptotics for the spin-weighted spheroidal equation in the case of s=1/2 Dong Kun(董锟), Tian Gui-Hua(田贵花), and Sun Yue(孙越) Chin. Phys. B, 2011, 20 (7): 071101.   DOI: 10.1088/1674-1056/20/7/071101 Abstract （1291）      PDF （146KB）（544）       Knowledge map    The spin-weighted spheroidal equation in the case of s=1/2 is thoroughly studied by using the perturbation method from the supersymmetric quantum mechanics. The first-five terms of the superpotential in the series of parameter β are given. The general form for the n-th term of the superpotential is also obtained, which could also be derived from the previous terms Wk, k < n. From these results, it is easy to obtain the ground eigenfunction of the equation. Furthermore, the shape-invariance property in the series of parameter β is investigated and is proven to be kept. This nice property guarantees that the excited eigenfunctions in the series form can be obtained from the ground eigenfunction by using the method from the supersymmetric quantum mechanics. We show the perturbation method in supersymmetric quantum mechanics could completely solve the spin-weight spheroidal wave equations in the series form of the small parameter β. Select Spin-weighted spheroidal equation in the case of s=1 Sun Yue(孙越), Tian Gui-Hua(田贵花), and Dong Kun(董锟) Chin. Phys. B, 2011, 20 (6): 061101.   DOI: 10.1088/1674-1056/20/6/061101 Abstract （1343）      PDF （244KB）（727）       Knowledge map    We present a series of studies to solve the spin-weighted spheroidal wave equation by using the method of super-symmetric quantum mechanics. We first obtain the first four terms of super-potential of the spin-weighted spheroidal wave equation in the case of s=1. These results may help summarize the general form for the n-th term of the super-potential, which is proved to be correct by means of induction. Then we compute the eigen-values and the eigen-functions for the ground state. Finally, the shape-invariance property is proved and the eigen-values and eigen-functions for excited states are obtained. All the results may be of significance for studying the electromagnetic radiation processes near rotating black holes and computing the radiation reaction in curved space-time. Select Lie symmetry and Mei conservation law of continuum system Shi Shen-Yang(施沈阳) and Fu Jing-Li(傅景礼) Chin. Phys. B, 2011, 20 (2): 021101.   DOI: 10.1088/1674-1056/20/2/021101 Abstract （1499）      PDF （151KB）（944）       Knowledge map    Lie symmetry and Mei conservation law of continuum Lagrange system are studied in this paper. The equation of motion of continuum system is established by using variational principle of continuous coordinates. The invariance of the equation of motion under an infinitesimal transformation group is determined to be Lie-symmetric. The condition of obtaining Mei conservation theorem from Lie symmetry is also presented. An example is discussed for applications of the results. Select Conformal invariance and conserved quantities of Birkhoff systems under second-class Mei symmetry Luo Yi-Ping(罗一平) and Fu Jin-Li(傅景礼) Chin. Phys. B, 2011, 20 (2): 021102.   DOI: 10.1088/1674-1056/20/2/021102 Abstract （1495）      PDF （197KB）（849）       Knowledge map    This paper proposes a new concept of the conformal invariance and the conserved quantities for Birkhoff systems under second-class Mei symmetry. The definition about conformal invariance of Birkhoff systems under second-class Mei symmetry is given. The conformal factor in the determining equations is found. The relationship between Birkhoff system's conformal invariance and second-class Mei symmetry are discussed. The necessary and sufficient conditions of conformal invariance, which are simultaneously of second-class symmetry, are given. And Birkhoff system's conformal invariance may lead to corresponding Mei conserved quantities, which is deduced directly from the second-class Mei symmetry when the conformal invariance satisfies some conditions. Lastly, an example is provided to illustrate the application of the result. Select Noether's theory of Lagrange systems in discrete case Lü Hong-Sheng(吕洪升), Zhang Hong-Bin(张宏彬), and Gu Shu-Long(顾书龙) Chin. Phys. B, 2011, 20 (1): 011101.   DOI: 10.1088/1674-1056/20/1/011101 Abstract （1420）      PDF （172KB）（825）       Knowledge map    In this paper, Noether theory of Lagrange systems in discrete case are studied. First, we briefly overview the well-known Noether theory of Lagrange system in the continuous case. Then, we introduce some definitions and notations, such as the operators of discrete translation to the right and the left and the operators of discrete differentiation to the right and the left, and give the conditions for the invariance of the difference functional on the uniform lattice and the non-uniform one, respectively. We also deduce the discrete analog of the Noether-type identity. Finally, the discrete analog of Noether's theorem is presented. An example was discussed to illustrate these results. Select Inverse Monte Carlo study on effective interaction potential of Ag--Rh alloy from pair correlation functions Zhang Jing-Xiang(张景祥), Li Hui(李辉), Song Xi-Gui(宋西贵), and Zhang Jie(张洁) Chin. Phys. B, 2009, 18 (12): 5259-5266.   DOI: 10.1088/1674-1056/18/12/024 Abstract （1740）      PDF （1035KB）（764）       Knowledge map    This paper presents an inverse Monte Carlo method to reconstruct pair interaction potential from pair correlation function. This approach adopts an iterative algorithm on interaction potential to fit known pair correlation function by compelling deviations of canonical average to meet with Hamiltonian parameters on a basis of statistical mechanism. The effective interaction potential between particles in liquid Ag--Rh alloys has been calculated with the inverse Monte Carlo method. It demonstrates an effective and simple way to obtain the effective potential of complex melt systems. Select Analysis of the decay $B^0 \to \chi_{c1}\pi^0$ with light-cone QCD sum rules Wang Zhi-Gang(王志刚) Chin. Phys. B, 2009, 18 (9): 3802-3809.   DOI: 10.1088/1674-1056/18/9/031 Abstract （1734）      PDF （209KB）（533）       Knowledge map    In this article, we calculate the contribution from the nonfactorizable soft hadronic matrix element to the decay $B^0 \to \chi_{c1}\pi^0$ with the light-cone quantum chromo-dynamic (QCD) sum rules. The numerical results show that its contribution is rather large and should not be neglected. The total amplitudes lead to a branching fraction which is in agreement with the experimental data marginally. Select Topological aspects in a two-component Bose condensed system in neutron star Ren Ji-Rong(任继荣) and Guo Heng(郭恒) Chin. Phys. B, 2009, 18 (8): 3379-3383.   DOI: 10.1088/1674-1056/18/8/043 Abstract （1404）      PDF （165KB）（574）       Knowledge map    By making use of Duan--Ge's decomposition theory of gauge potential and the topological current theory proposed by Prof. Duan Yi-Shi, we study a two-component superfluid Bose condensed system, which is supposed to be realized in the interior of neutron stars in the form of the coexistence of a neutron superfluid and a protonic superconductor. We propose that this system possesses vortex lines. The topological charges of the vortex lines are characterized by the Hopf indices and the Brower degrees of $\phi$-mapping. Select Experimental sensitivity on searching for CP violation at BES-III Zhao Ming-Gang(赵明刚), Rong Gang(荣刚), Ma Hai-Long(马海龙), and Zhang Da-Hua(张达华) Chin. Phys. B, 2009, 18 (6): 2213-2216.   DOI: 10.1088/1674-1056/18/6/018 Abstract （1713）      PDF （174KB）（657）       Knowledge map    The CP violation in the D system is predicted to be an unobserved level in the Standard Model. In this paper, we describe the method of searching for CP violation decay processes with the coherently produced $D^0\bar{D}^0$ mesons from the $\psi$(3770) decay. The CP violation decay processes can be searched for at the BES-III experiment. The experimental sensitivity for searching for the CP violation can reach about a 10-4 level with a $\psi$(3770) data sample of about 20 fb-1. Select Knot solitons in AFZ model Ren Ji-Rong(任继荣), Mo Shu-Fan(墨淑凡), and Zhu Tao(朱涛) Chin. Phys. B, 2009, 18 (5): 1814-1820.   DOI: 10.1088/1674-1056/18/5/016 Abstract （1219）      PDF （143KB）（540）       Knowledge map    This paper studies the topological properties of knotted solitons in the (3+1)-dimensional Aratyn--Ferreira--Zimerman (AFZ) model. Topologically, these solitons are characterized by the Hopf invariant I, which is an integral class in the homotopy group $\pi$3(S3)=Z. By making use of the decomposition of U(1) gauge potential theory and Duan's topological current theory, it is shown that the invariant is just the total sum of all the self-linking and linking numbers of the knot family while only linking numbers are considered in other papers. Furthermore, it is pointed out that this invariant is preserved in the branch processes (splitting, merging and intersection) of these knot vortex lines. Select Infinite series symmetry reduction solutions to the modified KdV--Burgers equation Yao Ruo-Xia(姚若侠), Jiao Xiao-Yu(焦小玉), and Lou Sen-Yue(楼森岳) Chin. Phys. B, 2009, 18 (5): 1821-1827.   DOI: 10.1088/1674-1056/18/5/017 Abstract （1284）      PDF （131KB）（659）       Knowledge map    From the point of view of approximate symmetry, the modified Korteweg--de Vries--Burgers (mKdV--Burgers) equation with weak dissipation is investigated. The symmetry of a system of the corresponding partial differential equations which approximate the perturbed mKdV--Burgers equation is constructed and the corresponding general approximate symmetry reduction is derived; thereby infinite series solutions and general formulae can be obtained. The obtained result shows that the zero-order similarity solution to the mKdV--Burgers equation satisfies the Painlevé II equation. Also, at the level of travelling wave reduction, the general solution formulae are given for any travelling wave solution of an unperturbed mKdV equation. As an illustrative example, when the zero-order tanh profile solution is chosen as an initial approximate solution, physically approximate similarity solutions are obtained recursively under the appropriate choice of parameters occurring during computation. Select Regarding the 21S0 and 23S1 multiplets Liu Yun-Hu(刘云虎) Chin. Phys. B, 2009, 18 (5): 1828-1832.   DOI: 10.1088/1674-1056/18/5/018 Abstract （1538）      PDF （113KB）（485）       Knowledge map    This paper discusses the masses and possible members of $2^1S_0$ and $2^3S_1$ meson multiplets in the framework of meson--meson mixing and Regge phenomenology. For the $2^1S_0$ meson nonet, $K^*(1460)$ may be the observed  state of the $2^1S_0$ isodoublet with a mass of 1400~MeV and the mass of $\omega(1420)$ is 1412 MeV. For the $2^3S_1$ meson nonet, $K^*(1410)$ seems too light to be the $2^3S_1$ $n\overline{s}$ member. The fact that the  agreement between the present findings and those given by experiments and other different approaches is satisfactory implies that the assignments in this paper may be reasonable. Select Topological aspect of disclinations in two-dimensional crystals Qi Wei-Kai(齐维开), Zhu Tao(朱涛), Chen Yong(陈勇), and Ren Ji-Rong(任继荣) Chin. Phys. B, 2009, 18 (3): 1002-1008.   DOI: 10.1088/1674-1056/18/3/026 Abstract （1173）      PDF （452KB）（1048）       Knowledge map    By using topological current theory, this paper studies the inner topological structure of disclinations during the melting of two-dimensional systems. From two-dimensional elasticity theory, it finds that there are topological currents for topological defects in homogeneous equation. The evolution of disclinations is studied, and the branch conditions for generating, annihilating, crossing, splitting and merging of disclinations are given. Select Towards the understanding of 11P1 meson mass spectrum Feng Xue-Chao (冯学超), Jiang Feng-Chun(蒋逢春), Chang Tong-Qin (常同钦), Feng Jun-Lan(冯军兰) Chin. Phys. B, 2008, 17 (12): 4472-4475.   DOI: 10.1088/1674-1056/17/12/023 Abstract （1722）      PDF （170KB）（691）       Knowledge map    Based on the meson-meson mixing and Regge trajerory, this paper establishes the mass relations which can describe the mass spectrum of 11P1 meson state. Using these mass relations, it obtains the mass of K1B, h1(1380) and hc(1P) to be 1358.5MeV, 1468MeV and 3543.9MeV, respectively. The results are compared with other theoretical results and should be tested by experiments in the future. Select Classical integrability of strings in $\gamma$-deformed backgrounds Xie Xiao-Ning (解小宁), Yue Rui-Hong (岳瑞宏) Chin. Phys. B, 2008, 17 (11): 4153-4157.   DOI: 10.1088/1674-1056/17/11/032 Abstract （1432）      PDF （175KB）（621）       Knowledge map    This paper considers classical strings propagating in $\gamma$-deformed $AdS_3\times S^3$ backgrounds generated by certain shift T-dualities accompanied (TsT) transformations on $S^3$ and $AdS_3$, respectively. It finds that the $U(1)$ currents of strings with the twisted boundary conditions are equal to those in $\gamma$-deformed backgrounds generated by TsT transformations on both $S^3$ and $AdS_3$. Applying the TsT transformations, it derives the local Lax connections and the monodromy matrices in $\gamma$-deformed backgrounds with the spectral parameter which ensure the classical integrability of the string theories. Select Time-domain analytic solutions of two-wire transmission line excited by a plane-wave field Ni Gu-Yan(倪谷炎), Yan Li(颜力), and Yuan Nai-Chang(袁乃昌) Chin. Phys. B, 2008, 17 (10): 3629-3634.   DOI: 10.1088/1674-1056/17/10/016 Abstract （1188）      PDF （317KB）（679）       Knowledge map    This paper reports that an analytic method is used to calculate the load responses of the two-wire transmission line excited by a plane-wave directly in the time domain. By the frequency-domain Baum--Liu--Tesche (BLT) equation, the time-domain analytic solutions are obtained and expressed in an infinite geometric series. Moreover, it is shown that there exist only finite nonzero terms in the infinite geometric series if the time variate is at a finite interval. In other word, the time-domain analytic solutions are expanded in a finite geometric series indeed if the time variate is at a finite interval. The computed results are subsequently compared with transient responses obtained by using the frequency-domain BLT equation via a fast Fourier transform, and the agreement is excellent. Select The He--McKellar--Wilkens effect for spin-1 particles on non-commutative space Li Kang(李康), Sayipjamal Dulat (沙依甫加马力 $\cdot$ 达吾来提), and Wang Jian-Hua(王剑华) Chin. Phys. B, 2008, 17 (5): 1716-1719.   DOI: 10.1088/1674-1056/17/5/030 Abstract （1287）      PDF （170KB）（707）       Knowledge map    By using star product method, the He--McKellar--Wilkens (HMW) effect for spin-one neutral particle on non-commutative (NC) space is studied. After solving the Kemmer-like equations on NC space, we obtain the topological HMW phase on NC space where the additional terms related to the space--space non-commutativity are given explicitly. Select Interference nature of light Yao Zhi-Xin(姚志欣), Zhong Jian-Wei(钟建伟), Mao Bang-Ning(毛邦宁), and Pan Bai-Liang(潘佰良) Chin. Phys. B, 2008, 17 (2): 578-584.   DOI: 10.1088/1674-1056/17/2/037 Abstract （1276）      PDF （169KB）（619）       Knowledge map    Interference of light has been reinvestigated theoretically by linear superposition of two different state-vector functions, of which each describes the photons from one of two different light sources in both polarization and intensity. By the use of microscopic parameters for a photon, namely probability amplitude and phase, it is again validated that interference of light occurs only between the same photons possessing a set of the selfsame eigenvalues. Select Neutrino energy loss by electron capture on strongly screened iron group nuclei Liu Jing-Jing(刘晶晶) and Luo Zhi-Quan(罗志全) Chinese Physics, 2007, 16 (12): 3624-3630.   DOI: 10.1088/1009-1963/16/12/012 Abstract （1267）      PDF （868KB）（496）       Knowledge map    The influences on the neutrino energy loss rates in iron group nuclei at the same density are investigated in the presence of strong electron screening and in the absence of electron screening. The results show that at a temperature of $15\times10^9$ K, the neutrino energy loss rates which come from the electron capture process for most iron group nuclei decrease no more than 2 orders of magnitude but for the others (such as $^{53,55,56,57,58,59,60}$Co, $^{56,59}$Ni) they can decrease about 3 orders of magnitude due to strong electron screening (SES), whereas, at a temperature of $10^9K$ the neutrino energy loss rates of the most iron group nuclei can be diminished greatly due to the SES. For example, $^{61}$Fe, $^{60}$Fe, and $^{62}$Ni the neutrino energy loss rates decrease about 4, 15 and 16 orders of magnitude and for $^{57}$Cr, $^{58}$Cr, and $^{60}$Cr decrease about 18, 12, and 10 orders of magnitude respectively. According to our calculations the neutrino energy loss rates of nuclei $^{58}$Mn, $^{59}$Mn, $^{60}$Mn, and $^{62}$Mn may decrease about 13 orders of magnitude at a temperature of $10^9$ K due to the SES. page Page 1 of 3 Total 57 records First page Prev page Next page Last page