You need JavaScript to view this

The form factors of the process {gamma}*{gamma}*{yields}{pi}{sup 0} for small virtuality of one of the photons and QCD sum rules (1): the structure of the infrared singularities

Technical Report:

Abstract

We extend the QCD sum rule analysis of the form factor F{sub {gamma}*}{gamma}{sub *{yields}{pi}{sup 0}}(q{sub 1}{sup 2},q{sub 2}{sup 2}) into the region of small virtuality of one of the photons, where one should perform more precisely an OPE to factorize large and small distance contributions. As a first step the form factor is investigated in the region of moderate virtualities and the full corrections in the sum rule are obtained. It is shown that the infrared mass singularities are subtracted in the corresponding OPE for essentially nonsymmetric kinematics due to the operators of lowest two twists. On a simple scalar example the most important steps of the further calculations are demonstrated. 26 refs.; 8 figs.
Authors:
Radyushkin, A V; [1]  Ruskov, R [2] 
  1. Joint Inst. for Nuclear Research, Dubna (Russian Federation). Lab. of Theoretical Physics
  2. Bylgarska Akademiya na Naukite, Sofia (Bulgaria). Inst. za Yadrena Izsledvaniya i Yadrena Energetika
Publication Date:
Dec 31, 1992
Product Type:
Technical Report
Report Number:
JINR-E-2-92-425
Reference Number:
SCA: 662230; PA: AIX-25:004149; EDB-94:015721; ERA-19:005631; NTS-94:014784; SN: 93001121081
Resource Relation:
Other Information: DN: Submitted to Yad. Fiz.; PBD: 1992
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; FORM FACTORS; SUM RULES; PHOTON-PHOTON INTERACTIONS; ASYMPTOTIC SOLUTIONS; FACTORIZATION; FEYNMAN DIAGRAM; GAMMA DECAY; INFRARED DIVERGENCES; PHOTONS; PIONS NEUTRAL; QUANTUM CHROMODYNAMICS; VIRTUAL STATES; 662230
OSTI ID:
10109860
Research Organizations:
Joint Inst. for Nuclear Research, Dubna (Russian Federation). Lab. of Theoretical Physics
Country of Origin:
JINR
Language:
English
Other Identifying Numbers:
Other: ON: DE94609665; TRN: RU9305396004149
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
INIS
Size:
20 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Radyushkin, A V, and Ruskov, R. The form factors of the process {gamma}*{gamma}*{yields}{pi}{sup 0} for small virtuality of one of the photons and QCD sum rules (1): the structure of the infrared singularities. JINR: N. p., 1992. Web.
Radyushkin, A V, & Ruskov, R. The form factors of the process {gamma}*{gamma}*{yields}{pi}{sup 0} for small virtuality of one of the photons and QCD sum rules (1): the structure of the infrared singularities. JINR.
Radyushkin, A V, and Ruskov, R. 1992. "The form factors of the process {gamma}*{gamma}*{yields}{pi}{sup 0} for small virtuality of one of the photons and QCD sum rules (1): the structure of the infrared singularities." JINR.
@misc{etde_10109860,
title = {The form factors of the process {gamma}*{gamma}*{yields}{pi}{sup 0} for small virtuality of one of the photons and QCD sum rules (1): the structure of the infrared singularities}
author = {Radyushkin, A V, and Ruskov, R}
abstractNote = {We extend the QCD sum rule analysis of the form factor F{sub {gamma}*}{gamma}{sub *{yields}{pi}{sup 0}}(q{sub 1}{sup 2},q{sub 2}{sup 2}) into the region of small virtuality of one of the photons, where one should perform more precisely an OPE to factorize large and small distance contributions. As a first step the form factor is investigated in the region of moderate virtualities and the full corrections in the sum rule are obtained. It is shown that the infrared mass singularities are subtracted in the corresponding OPE for essentially nonsymmetric kinematics due to the operators of lowest two twists. On a simple scalar example the most important steps of the further calculations are demonstrated. 26 refs.; 8 figs.}
place = {JINR}
year = {1992}
month = {Dec}
}