1984年, 第3卷, 第5期　
刊出日期：1984-09-30

  

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  GENERALIZED SCALING LAWS IN THRESHOLD PKENOMENA OF NON-EQUILIBRIUM SYSTEMS

  刘建民

  理论物理通讯. 1984, 3(5): 533-543.

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  A general discussion on threshold phenomena, namely exponent behaviors of abrupt transitions between steady states near a threshold for a non-equilibrium system satisfying potential condition and having the arbitrary values of z and c, both characteristic parameters of the system, is given. It is shown that the scaling hypothesis in general homogeneous function form holds for threshold phenomena. The expressions of the threshold exponents,β,δ,γ^′ and α^′of the threshold amplitudes, B, D, Γ^′ and A^′,and the generalized scaling laws obeyed by them are all obtained. These Iaws reduce to the same as the scaling laws in critical phenomena when z=c=1.The results support, in respect of exponent behaviors of transitions, the statement on the great similarity between the phase transitions in equilibrium systems and the abrupt transitions of steady states in non-equilibrium systems.
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  THE SS COLLISION SOLUTION IN POLYACETYLENE

  杨振青, 郭儒

  理论物理通讯. 1984, 3(5): 545-550.

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  In this paper, the projection of an S-G field is used to describe the double-state system and obtain an SS collision solution, with which the self-consistent equations of electron wave-functions have apparent analytic solutionsin two extreme cases.
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  SPHERICALLY SYMMETRIC AND STATIC FIELDS IN LINEARIZED GAUGE THEORIES OF GRAVITATION

  张元仲

  理论物理通讯. 1984, 3(5): 551-564.

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  In this paper Newtonian limit in the Poincare gauge field theory of gravitation is investigated. In spherically symmetric and static cases interior and exterior solutions of the linearized field equations with gravitational sourtion are obtained by maens of Green's function for the five Lagrangians with out ghosts and tachyons. In cases of four Lagrangians,the space-time metrics outside gravitational source are the usual Schwarzschild one of the first-older, while in the case of the fifth hagrangian the space-time metric differs from the Schwarzschild one. Under both,Newtonian and-weak gravitational field approximations,the motion of a test particle without span should therefore be different from Newton's second law. As a result of the exchanged particles of spin o⁺ the deviation from Newton's second law is a Yukawa term which is attractive. A distance-dependent gravitational "constant" G(r) can be defined according to the new result. The difference between G(r) and Newton's gravitational constant G_∞ is due to a nonzero component of torsion tensor, the effect of which can be tested by measuring G(r).
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  THE STRUCTURE FUNCTION OF SIX-QUARK CLUSTER AND THE EMC EFFECT

  朱伟

  理论物理通讯. 1984, 3(5): 565-573.

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  Based upon the experiments on electric form factor for deutron use is made of the valon model to determine the valon distribution functions in a six-quark cluster. By using the QCD evolution equation, the Q² dependence of the structure function of a six-quark cluster is obtained. The EMC effect is discussed and it is pointed out that the distortion of the nucleon structure function in nuclei may be ascribed to the contributions from the six-quark cluster(for x>0.3) and the meson cloud(for x<0.3).
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  UNITARY TRAPJSFORMATIOPJS IN LATTICE GAUGE THEORY WITH FEPMIONS AND THE MESON SPECTRUM

  郭硕鸿, 刘金明, 陈启洲, 胡连

  理论物理通讯. 1984, 3(5): 575-583.

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  The Hamiltonian of lattice gauge theory with fermions is diagonalized in the one-link approximation and the meson spectrum of SU(N) theory with one flavor is derived.
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  ON THE EFFECTIVE LAGRANGIAN FOR THE PURE SUPER YANG-MILLS THEORY DERIVED FROM RENORMALIZATION GROUP CONSIDERATIONS

  张肇西, 周光召, 戴元本

  理论物理通讯. 1984, 3(5): 585-592.

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  Further comments and analysis are made on the derivation of the effective Lagrangian for the N=1 pure super Yang-Mi11s theory from renormalization group considerations and on the implications of results obtained.
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  SYMMETRIC AND ASYMMETRIC ANOMALIES AND EFFECTIVE LAGRANGIAN

  周光召, 郭汉英, 吴可, 宋行长

  理论物理通讯. 1984, 3(5): 593-603.

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  The properties of the effective Lagrangian for the low-energy Goldstone-gauge field system constructed from the Chern-Simons topological invariant are further discussed. Both the symmetric anomaly and the asymmetric anomaly are connected with this Lagrangian.
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  ON THE NEGATIVE-PARITY STRANGE EARYOIC SPECTRUM

  郑玉明, 刘祖华, 黄祥钟

  理论物理通讯. 1984, 3(5): 605-610.

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  The Coulomb-like plus exponentially rising confinement potential is applied to study the Iow-lying negative-parity strange baryonic spectrum. There does not exist any adjustable parameter in the calculation. The calculated position of the resonances and the predicted mixing angles are in good agreement with experiments. It is shown that the potential can also successfully describe the properties of all the low-lying negative-parity strange baryon states.
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  THE RADIOTHERAPEUTIC PLAN OF TUMOR INVESTIGATED BY MONTE CARLO METHOD

  杨耀臣

  理论物理通讯. 1984, 3(5): 611-618.

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  The optimization study of the radiotherapeutic plan by Monte Carlo method is discussed in this paper. The investigation results show that for a specific patient there must be an optimized radio-therapeutic plan, which includes the size, the direction and the energy of the incident γ-rays beam and the distance of the patient's skin from the irradiated source. It is pointed out in this paper that the isotope workers are challenged by the concept of radio-therapeutic science.
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  A THEORETICAL STUDY OF THE BIOLOGICAL INFORMATION

  黄惠慈

  理论物理通讯. 1984, 3(5): 619-627.

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  In this paper the relationship between organization and formation of biological irredundant information is discussed. It is found that the physical entity to which biological irredundant information corresponds is a configuration frozen via an organization process and the amount of the irredundant information obtained equals the configuration entropy unreleased. Also it is found that the formation of biological irredundant information requires an organization carried out via an external process, with the rate of the external process exceeding the rate of the internal relaxation.
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  CHAOS AND OTHER TEMPORAL SELF-ORGANIZATION PATTERNS IN COUPLED ENZYME-CATALYZED SYSTEMS

  李跃先, 丁达夫, 徐京华

  理论物理通讯. 1984, 3(5): 629-638.

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  This paper is a study of the dynamic behaviors of the coupled biochemical model systems containing two instability generating mechanisms. The system, as studied in detail, consists of two allosteric enzymes coupled in series, the first inhibited by its substrates and the second activated by its products. It can exhibit all known patterns of temporal selforganization: periodic oscillation, bistability, hard excitation,birhythmicity, period-doubling leading to chaos, etc. The relationship between these modes of dynamic behavior is analyzed as a function of the control parameter. A plausible reason is given to how the two instability mechanisms cooperate to induce these behaviors. All the four possible combinations of the two instability generators are discussed. At least three out of the four systems are able to exhibit such phenomena. This shows that they can generally be expected to occur in such coupled enzyme-catalyzed systems. Similarities between behaviors of our model system and experimental observations. in a similar chemical system are discussed.
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  A NEW APPROACH TO DALE'S EQUATION

  徐效海

  理论物理通讯. 1984, 3(5): 639-642.

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  Dale's equation which can be used to generate a particular integral of Einstein equations is derived by using a new approach. It is shown that there is a transformation under which Dale's equation is invariant.
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  THE DISCUSSION ON SOLVING THE COUPLING EQUATIONS WITH COLOR VAN DER WAALS FORCE IN THE QUARK POTENTIAL MODEL

  华大平, 郑玉明

  理论物理通讯. 1984, 3(5): 643-648.

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  The second order homogeneous ordinary differential equations were derived by indroducing the Gaussian type quark confinement potential in order to study color-analog Van der waals force in N-N interaction. In this paper, it is proved theoretically that the existence and uniqueness of non-zero solution of problem of boundary value in this kind of equations and the non-zero solution are calculated by numerical method (Gill method).
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  EFFECTS OF DIQUARK MECHANISM IN HIGH ENERGY MULTIPRODUCTION

  高崇寿, 何祚庥

  理论物理通讯. 1984, 3(5): 649-651.

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  The effects of diquark mechanism based on fireball model are verified in high energy multiproductions. The calculated values for average transverse momenta and yield ratio of baryons to mesons are consistent with SPS experiment and ISR experiment. Further possible behaviors of diguark mechanism in multiproduction are discussed.
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  A NEW MECHANISM OF GAUGE SYMMETRY EREAKING INDUCED BY GRAVITY AND NATURALLY VANISHING COSMOLOGICAL CONSTANT

  东方晓, 杜东生, 薛丕友, 周咸建

  理论物理通讯. 1984, 3(5): 653-656.

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  A new mechanism of gauge symmetry breaking is found which is induced by gravity in the SU(N) SUSY GUTS. The cosmological constant naturally vanishes, but the vacuum degeneracy cannot be removed at zero temperature.
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  ON THE RADIATIVE DECAY OF HEAVY VECTOR MESON INTO HIGGS PARTICLE

  杨维明, 戴巍, 朱重远

  理论物理通讯. 1984, 3(5): 657-661.

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  An estimation of the contribution from the vector meson intermediate state to the width of radiative decay of a heavy vector meson composed of heavy quarks into Higgs particle is given. Under some approximation,it. exhibits a value four times larger than that obtained by using free quark picture. The implication of this result for interpreting ξ(2.2) as Higgs scalar is also discussed.