The investigation of the photon structure has been an active field of research both theoretically and experimentally [1,2,3,4]. Also there has been growing interest in the study of the spin structure of photon. In particular, the first moment of the polarized photon structure function g 1 has attracted attention in connection with its relevance to the QED and QCD axial anomaly [5,6,7,8,9]. The ...

YNU-5 zeolite has the YFI-type framework with a 12-12-8-ring system (2-dimensional 12-oxygen membered ring pores 3-dimensionally connected by twin 8-ring channels), and isolated channels separated from thin (mono-atomic silicate) wall. In this study, acidic property of was analyzed mainly means ammonia IRMS-TPD (infrared/mass spectroscopy temperature-programmed desorption) method. addition, acc...

We investigate parton distributions in the virtual photon target, both polarized and unpolarized, up to the next-leading order (NLO) in QCD. Parton distributions can be predicted completely up to NLO, but they are factorization-scheme-dependent. We analyze parton distributions in several factorization schemes and discuss their scheme dependence. Particular attentions are paid to the axial anoma...

Abslmct-In this paper we examine the selection of feature points for visual servoing methods using multiresolution critical-point P ten (CPF). With the increased number of feature points made available to us using CPF, we hope to improve the robustness of the system by allowing the algorithm to automatically detert usable feature points on virtually any object without any a priori knowledge of ...

We study the three positivity constraints among the eight structure functions of virtual photon, derived from the Cauchy-Schwarz inequality and hence, which are model independent. The photon structure functions obtained from the simple parton model show quite different behaviors either in a massive quark case or in a massless one, but they satisfy, in both cases, the three positivity constraint...

Polarized photon structure can be studied in the future polarized e+e− colliding-beam experiments. We investigate the spin-dependent structure function of the virtual photon g 1 (x,Q , P ), in perturbative QCD for Λ P 2 Q, where −Q2 (−P ) is the mass squared of the probe (target) photon. The analysis is performed to next-to-leading order in QCD. We particularly emphasize the renormalization sch...

We show that the background field method (BFM) is a simple way of deriving the same gauge-invariant results which are obtained by the pinch technique (PT). For illustration we construct gauge-invariant selfenergy and three-point vertices for gluons at one-loop level by BFM and demonstrate that we get the same results which were derived via PT. We also calculate the four-gluon vertex in BFM and ...

KUNS-2121 YNU-HEPTh-07-103 The unpolarized virtual photon structure functions F γ 2 (x,Q , P ) and F γ L(x,Q , P ) are investigated in perturbative QCD for the kinematical region Λ ≪ P 2 ≪ Q, where −Q(−P ) is the mass squared of the probe (target) photon and Λ is the QCD scale parameter. In the framework of operator product expansion supplemented by the renormalization group method, the definit...

On the other hand, no one has yet constructed a sequence of forms for which yn{f) is unbounded, let alone of order n, as n -> oo. We have therefore thought it worthwhile to describe, in some detail, a new class of extreme forms yielding values yn{f) of order n% for suitable large n. More specifically, corresponding to each N = 2 (n = 2, 3, . . .) and to each sequence of integers Ao, Xv . . ., X...