Haruo Fujisaki

Dimensional Regularization of the Closed Bosonic Thermal String

The dimensionally regularized, infrared behaviour of the one-loop self-energy amplitude of the dilaton, graviton and antisymmetric tensor field is described at any finite temperature in proper reference to the thermal cosmological constant in the D = 26 closed-bosonic-thermal-string theory within the framework of the thermofield dynamics.

Infra-red behaviour of the type-II closed thermal superstring

The infra-red behaviour of the type-II closed thermal superstring is examined for the dimensionally regularized one-loop cosmological constant within the framework of the thermofield dynamics.

Renormalizability of open bosonic thermal strings

La stabilite thermique de la renormalisation des cordes bosoniques est donnee en exemple a travers la regularisation de Neven-Scherk de la self-energie du tachyon planaire dans le cadre de la dynamique du thermochamp

Thermofield dynamics of the heterotic string—physical aspects of the thermal duality

The thermofield dynamics of the D = 10 heterotic thermal string theory is described in proper reference to the thermal duality symmetry as well as the thermal stability of modular invariance in association with the global phase structure of the heterotic thermal string ensemble.

Infrared Behaviour of the Type-I Neveu-Schwarz-Ramond Open Thermal Superstring

The infrared behaviour of the planar massless vector boson self-energy is described at finite temperature with the aid of the dimensional regularization in the type-I Neveu-Schwarz-Ramond open thermal superstring within the thermofield dynamical approach.

One-Loop Thermal Tachyon Self-Energy

The infrared behaviour of the one-loop tachyon self-energy is described at any finite temperature in the D = 26 closed-bosonic-thermal-string theory based upon the thermofield dynamics.

Infra-red self-energy amplitude of the closed bosonic thermal string

The dynamical mass generation of the dilaton, graviton and antisymmetric tensor field is enunciated through the infra-red behaviour of the one-loop self-energy amplitude at any finite temperature in the D = 26 closed-bosonic-thermal-string theory within the framework of the thermofield dynamics.

The Thermal Veneziano Duality

Une materialisation de la dualite de Veneziano, est decrite non seulement a la temperature nulle, mais aussi aux temperatures non nulles dans le cadre general de la theorie de la matrice S analytique

Comments on the thermal stability of the type I Neveu-Schwarz-Ramond open superstring

The thermal stability of D = 10 supersymmetry and gauge invariance of the type-I Neveu-Schwarz-Ramond open superstring is investigated with the aid of the Neveu-Scherk regularization scenario for the planar massless vector boson self-energy within the framework of the thermofield dynamics.

Two-component structure of the geometrical pomeron

Phenomenological observations at FNAL and CERN-ISR not only confirm the dominance of the short range correlation (SRC) over the long-range correlation (LRC) in multihadronie production (1), but also suggest geometrical scaling (2) and two-component structure (3) of the pomeronic amplitude. Moreover, it has long been recognized that the absorptive mechanism is crucial for the possible stabilization of the pomeron under direct-channel unitarization (~-8). Consequently, it will be of physical importance to investigate the theoretical features of central and peripheral components of the geometrical pomeron within the framework of an absorptive multiperipheral unitarization. By the use of the absorptive procedure of CAN]~SCHI and SCrtwI~R (5), in fact, the first-step unitarization of the dipole pomeron (DPP) has already been studied along this line in a recent paper of two of us (s), which gives a successful description of the SRC component. In this short note, therefore, let us perform the second-step unitarization of the DPP by the self-consistent introduction of the LRC component and examine the possible stability of the two-component structure under absorption. First of all, let us summarize the typical features of the singularity structure of the first-step unitarization of the Dt)P (*). First Crtot(~Y), ~el(:Y) and a~,l(iY ) are described by the colliding-cut pomeron (CCP) of the Finkelstein-Zaeh ariasen type (~), which coalesces into a triple pole at l- 1 for t 0. Secondly az~(:Y) is effectively described by the multiperipheral exchange of the nonlcading colliding-cut pomeron (NLCP), which turns out to be a hard branch cut at 1 1 --gO~2 for t : 0 (**). Thirdly, the NLCP is legitimately approximated by the input DPP near t : 0 so long as go~ln In s/ln s. Finally