9322949
N=1* model and glueball superpotential from renormalization group-improved perturbation theory
A method for computing the low-energy non-perturbative properties of SUSY GFT, starting from the microscopic lagrangian model, is presented. The method relies on covariant SUSY Feynman graph techniques, adapted to low energy, and Renormalization-Group-improved perturbation theory. We apply the method to calculate the glueball superpotential in = 1 SU(2) SYM and obtain a potential of the Veneziano-Yankielowicz type.
123656946
Fermionic functional integration and the temporal gauge of QCD
SummaryIn this paper we compute the Feynman transition amplitude which describes the finite-time propagation of fermionic fields and use this result to extend to QCD the functional formulation of the temporal gauge (Ao=0), already known for pure Yang-Mills theories.RiassuntoIn questo lavoro si calcola l'ampiezza di transizione di Feynman che descrive la propagazione in tempo finito di campi fermionici: questo risultato è usato per estendere alla QCD la formulazione funzionale del «gauge» temporale (Ao=0), già nota per teorie di Yang-Mills.РезюмеВ этой статье мы вычисляем амплитуду перехода Фейнмана, которая описывает распределение фермионных полей в случае конечного времени. Полученный результат испоьзуется для обобщения на случай квантовой хромодинамики функциональной формулировки временной калибровки (A0=0), уже известной для чистых теорий Янга-Миллса.
126190271
THE CLASSICAL EQUIVALENCE OF MONODROMY MATRICES IN SQUASHED SIGMA MODEL
We show Yangian and quantum affine symmetries are realized in two-dimensional non-linear sigma models with squashed spheres target spaces. According to these symmetries, there are two descriptions for the classical dynamics. In each description, a Lax pair and the corresponding monodromy matrix are constructed. Both Lax pairs reproduce the same equations of motion and hence they are equivalent. We show the gauge-equivalence by constructing a map between monodromy matrices with the relation of spectral parameters.
10603102
Phase structure of a compact U(1) gauge theory from the viewpoint of a sine-Gordon model
We discuss the phase structure of the four-dimensional compact U(1) gauge theory at finite temperature using a deformation of the topological model. Its phase structure can be determined by the behavior of the Coulomb gas (CG) system on the cylinder. We utilize the relation between the CG system and the sine-Gordon (SG) model, and investigate the phase structure of the gauge theory in terms of the SG model. Especially, the critical-line equation of the gauge theory in the strong-coupling and high-temperature region is obtained by calculating the one-loop effective potential of the SG model.
121863527
Experimental studies of light neutron rich nuclei
Abstract Experimental studies of neutron rich nuclei 8 He, 10 He, 12 Be and 13 Be have been performed using radioactive beams.
2677382
Phase Structure of Compact QED from the Sine-Gordon/Massive Thirring Duality
We discuss a phase structure of compact QED in four dimensions by considering the theory as a perturbed topological model. In this scenario we use the singular configuration with an appropriate regularization, and so obtain the results similar to the lattice gauge theory due to the effect of topological objects. In this paper we calculate the thermal pressure of the topological model by the use of a one-dimensional Coulomb gas approximation, which leads to a phase structure of full compact QED. Furthermore the critical-line equation is explicitly evaluated. We also discuss relations between the monopole condensation in compact QED in four dimensions and the chiral symmetry restoration in the massive Thirring model in two dimensions.
14169325
Universal description of viscoelasticity with foliation preserving diffeomorphisms
Abstract A universal description is proposed for generic viscoelastic systems with a single relaxation time. Foliation preserving diffeomorphisms are introduced as an underlying symmetry which naturally interpolates between the two extreme limits of elasticity and fluidity. The symmetry is found to be powerful enough to determine the dynamics in the first order of strains.