Reconstruction of non-forward evolution kernels

被引：26

作者：

Belitsky, AV ^{[1
]}

Müller, D

Freund, A

机构：

[1] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

[2] Ist Nazl Fis Nucl, Sez Firenze, I-50125 Florence, Italy

来源：

PHYSICS LETTERS B | 1999年 / 461卷 / 03期

关键词：

evolution equation; two-loop exclusive kernels; conformal constraints;

D O I：

10.1016/S0370-2693(99)00837-0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We develop a framework for the reconstruction of the non-forward kernels which govern the evolution of twist-two distribution amplitudes and off-forward parton distributions beyond leading order. It is based on the knowledge of the special conformal symmetry breaking part induced by the one-loop anomaly and conformal terms generated by forward next-to-leading order splitting functions, and thus avoids an explicit two-loop calculation. We demonstrate the formalism by applying it to the chiral odd and flavour singlet parity odd sectors. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：270 / 279

页数：10

共 31 条

[1] EVOLUTION-EQUATIONS FOR QCD STRING-OPERATORS [J].

BALITSKY, II ;

BRAUN, VM .

NUCLEAR PHYSICS B, 1989, 311 (03) :541-584

[2] Two-loop effects in the evolution of non-forward distributions [J].

Belitsky, AV ;

Muller, D ;

Niedermeier, L ;

Schafer, A .

PHYSICS LETTERS B, 1998, 437 (1-2) :160-168

[3] Leading logarithmic evolution of the off-forward distributions [J].

Belitsky, AV ;

Geyer, B ;

Muller, D ;

Schafer, A .

PHYSICS LETTERS B, 1998, 421 (1-4) :312-318

[4] Next-to-leading order evolution of twist-two conformal operators: The Abelian case [J].

Belitsky, AV ;

Muller, D .

NUCLEAR PHYSICS B, 1998, 527 (1-2) :207-234

[5] Implications of N=1 supersymmetry for QCD conformal operators [J].

Belitsky, AV ;

Müller, D ;

Schäfer, A .

PHYSICS LETTERS B, 1999, 450 (1-3) :126-135

[6] Broken conformal invariance and spectrum of anomalous dimensions in QCD [J].

Belitsky, AV ;

Müller, D .

NUCLEAR PHYSICS B, 1999, 537 (1-3) :397-442

[7] Evolution of non-forward parton distributions in next-to-leading order:: singlet sector [J].

Belitsky, AV ;

Müller, D ;

Niedermeier, L ;

Schäfer, A .

NUCLEAR PHYSICS B, 1999, 546 (1-2) :279-298

[8] EVOLUTION-EQUATIONS FOR QUASI-PARTONIC OPERATORS [J].

BUKHVOSTOV, AP ;

FROLOV, GV ;

LIPATOV, LN ;

KURAEV, EA .

NUCLEAR PHYSICS B, 1985, 258 (3-4) :601-646

[9] Factorization for hard exclusive electroproduction of mesons in QCD [J].

Collins, JC ;

Frankfurt, L ;

Strikman, M .

PHYSICAL REVIEW D, 1997, 56 (05) :2982-3006

[10] EVOLUTION OF PARTON DENSITIES BEYOND LEADING ORDER - THE NON-SINGLET CASE [J].

CURCI, G ;

FURMANSKI, W ;

PETRONZIO, R .

NUCLEAR PHYSICS B, 1980, 175 (01) :27-92

← 1 2 3 4 →