Spin Structure Function of the Virtual Photon Beyond the Leading Order in QCD
نویسندگان
چکیده
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 scheme independence of the result.The non-leading corrections significantly modify the leading log result, in particular, at large x as well as at small x. We also discuss the non-vanishing first moment sum rule of g 1 , where O(αs) corrections are computed. YNU-HEPTh-98-103 KUCP-125 December 1998 ∗e-mail address: [email protected] †e-mail address: [email protected]
منابع مشابه
Polarized Virtual Photon Structure Function in the Next-to-leading Order in QCD
The virtual photon structure function g 1 (x,Q , P ), which can be obtained in polarized ee colliding-beam experiments, is investigated for Λ ≪ P 2 ≪ Q, where −Q (−P ) is the mass squared of the probe (target) photon. The analysis is made to next-to-leading order in QCD, in the framework of the QCD improved parton model with the DGLAP evolution equations. The non-leading corrections significant...
متن کاملPolarized Parton Distributions in the Photon and Factorization Scheme Dependence
Spin-dependent parton distributions in the polarized virtual photon are investigated in QCD up to the next-to-leading order (NLO). In the case Λ ≪ P 2 ≪ Q, where −Q (−P ) is the mass squared of the probe (target) photon, parton distributions can be predicted completely up to the NLO, but they are factorization-scheme-dependent. Parton distributions are analyzed in four different factorization s...
متن کاملar X iv : h ep - p h / 99 05 48 9 v 1 2 6 M ay 1 99 9 1 Spin structure function of the virtual photon ∗
In the last several years the nucleon’s spin structure functions have been extensively studied by deep inelastic scattering of polarized leptons on polarized nucleon targets. Recently there has been growing interest in the polarized photon structure function. Especially its first moment has attracted much attention in the literature in connection with the axial anomaly. Now the information on t...
متن کاملPolarized and Unpolarized Structures of the Virtual Photon
As Maria Krawczyk remarked in her introductory talk on structure functions [1] , the virtual photon structure provides a unique test of QCD. In this talk I would like to discuss the polarized and unpolarized virtual photon structures. But because of the limitation of the allocated time, I will mainly focus my talk on the polarized virtual photon structure. Recently there has been growing intere...
متن کاملYNU-HEPTh-06-103 KUNS-2017
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 ...
متن کامل