γγ→γZ过程高能总截面的数值计算

给出了γγ→γZ过程,质心系总能量在91.2—2000GeV的总截面.结果表明在总能量大于140GeV时,W玻色子图的贡献比起费米子图的贡献要大,当总能量在750GeV左右,截面达到极大值220fb(|cosθ|33cm^－2·sec^－1,每年在总能量750GeV处可观察到6000多个γγ→γZ事例,用它可以进一步验证标准模型,特别是其中规范粒子的三顶角和四顶角相互作用.     

Superfluid-insulator transition in a commensurate one-dimensional bosonic system with off-diagonal disorder

We study the nature of the superfluid-insulator quantum phase transition in a one-dimensional system of lattice bosons with off-diagonal disorder in the limit of a large integer filling factor. Monte Carlo simulations of two strongly disordered models show that the universality class of the transition in question is the same as that of the superfluid-Mott-insulator transition in a pure system. This result can be explained by disorder self-averaging in the superfluid phase and the applicability of the standard quantum hydrodynamic action. We also formulate the necessary conditions which should be satisfied by the stong-randomness universality class, if one exists.     

局域模(实的及虚的)的一种新表述

本文给出了一种新的表述局域模(实的及虚的)的方法。我们引入了变形豫解式的迹P(z).它仅在z平面的实轴上有奇异性,孤立极点对应于实局域模。将P(E+iη)向下解析延拓至第二黎曼面,则其复极点对应于虚的(或不稳定的)局域模。复极点的实部是不稳定局域模的能量,虚部是它寿命的倒数,自然地得到了寿命为正的限制。此能量与寿命符合于相应共振散射的能量与宽度。本文还讨论了实局域模与虚局域模之间的关系。最后,比较了P(z)的奇异性与态密度的变化,并进一步阐明了寿命为正的及负的解之间的差别。指出,一般说来,只有寿命为正的解当作用强度增加时会变成实的局域模,负寿命的解是不会的。     

Classical equilibrium generalized hydrodynamic correlation Green's functions. I

Moscow Institute of Electronic Engineering. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 82, No. 3, pp. 450–465, March, 1990.     

Construction of hydrodynamic asymptotics of the classical equilibrium correlation Green's functions by means of the Boltzmann equation

Moscow Institute of Electronic Engineering. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 82, No. 1, pp. 117–132, January, 1990.     

Classical equilibrium generalized hydrodynamic correlation Green's functions. II. Transverse autocorrelation Green's function

Moscow Institute of Electronic Engineering. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 83, No. 2, pp. 311–319, May, 1990.     

Construction of equations for classical equilibrium correlation Green's functions on the basis of kinetic equations. I

Moscow Institute of Electronic Engineering. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 88, No. 2, pp. 225–246, August, 1991.     

Construction of generalized hydrodynamic asymptotics for classical equilibrium correlation Green's functions on the basis of a Boltzmann kinetic equation

Moscow Institute of Electronic Engineering. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 82, No. 2, pp. 287–303, February, 1990.     

On the problem of the ergodic constant in the theory of classical Green's functions

Moscow Institute of Electronic Engineering. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 84, No. 3, pp. 459–473, September, 1990.