Higher twist distribution amplitudes of the pion and electromagnetic form factor F{sub {pi}}(Q{sup 2})

Journal Article · Sat Oct 01 00:00:00 EDT 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.72.074020· OSTI ID:20713645

Agaev, S S ^[1]

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1. Institute for Physical Problems, Baku State University, Z. Khalilov st. 23, Az-1148 Baku (Azerbaijan)

The pion electromagnetic form factor is calculated within the QCD light-cone sum rule method and using a renormalon model for the higher twist distribution amplitudes (DAs). The theoretical predictions are compared with the experimental data and constraints on the pion leading and twist-4 DAs are extracted. An upper bound on the twist-4 contribution to the form factor and estimates of effects due to higher conformal spins in the pion twist-4 DAs are obtained.

• OSTI ID: 20713645
• Journal Information: Physical Review. D, Particles Fields, Vol. 72, Issue 7; Other Information: DOI: 10.1103/PhysRevD.72.074020; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
DISTRIBUTION
ELECTROMAGNETIC FORM FACTORS
LIGHT CONE
PIONS
QUANTUM CHROMODYNAMICS
SPIN
SUM RULES