Resummation of target mass corrections in two-photon processes: Twist-two sector

Andrei Belitsky, D. Müller

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

We develop a formalism for the resummation of target mass corrections in off-forward two-photon amplitudes given by a chronological product of electromagnetic currents, arising in, e.g., deeply virtual Compton scattering. The method is based on a relation of composite operators with a definite twist to harmonic tensors, which form an irreducible representation of the Lorentz group. We give an application of the framework for the matrix elements of twist-two operators.

Original languageEnglish (US)
Pages (from-to)173-182
Number of pages10
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume507
Issue number1-4
DOIs
StatePublished - May 17 2001
Externally publishedYes

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sectors
operators
photons
tensors
electromagnetism
formalism
harmonics
composite materials
products
matrices
scattering

Keywords

  • Double distributions
  • Harmonic tensors
  • Skewed parton distributions
  • Target mass corrections
  • Two-photon processes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

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T1 - Resummation of target mass corrections in two-photon processes

T2 - Twist-two sector

AU - Belitsky, Andrei

AU - Müller, D.

PY - 2001/5/17

Y1 - 2001/5/17

N2 - We develop a formalism for the resummation of target mass corrections in off-forward two-photon amplitudes given by a chronological product of electromagnetic currents, arising in, e.g., deeply virtual Compton scattering. The method is based on a relation of composite operators with a definite twist to harmonic tensors, which form an irreducible representation of the Lorentz group. We give an application of the framework for the matrix elements of twist-two operators.

AB - We develop a formalism for the resummation of target mass corrections in off-forward two-photon amplitudes given by a chronological product of electromagnetic currents, arising in, e.g., deeply virtual Compton scattering. The method is based on a relation of composite operators with a definite twist to harmonic tensors, which form an irreducible representation of the Lorentz group. We give an application of the framework for the matrix elements of twist-two operators.

KW - Double distributions

KW - Harmonic tensors

KW - Skewed parton distributions

KW - Target mass corrections

KW - Two-photon processes

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JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

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