Pion Form Factor

We give the normalized leading asymptotic Q/sup 2/ dependence of the pion form factor in quantum chromodynamics: F/sub (/(Q/sup 2/) ..-->.. /sub Q/2/sub arrow-rightplus-or-minusinfinity/-2f/sub (/ /sup 2//bQ/sup 2/lnvertical-barQ/sup 2/vertical-bar, where f/sub (/ is the pion decay constant and b...

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Veröffentlicht in:	Phys. Rev. Lett.; (United States) 1979-01, Vol.43 (4), p.246-249
Hauptverfasser:	Farrar, Glennys R., Jackson, Darrell R.
Format:	Artikel
Sprache:	eng
Schlagworte:	645202 - High Energy Physics- Particle Interactions & Properties-Theoretical- Electromagnetic Interactions & Properties 645400 - High Energy Physics- Field Theory ASYMPTOTIC SOLUTIONS BETHE-SALPETER EQUATION BOSONS DECAY ELECTROMAGNETIC FORM FACTORS ELEMENTARY PARTICLES EQUATIONS FIELD THEORIES FORM FACTORS FUNCTIONS HADRONS LIGHT CONE MESONS PARTICLE PROPERTIES PHYSICS OF ELEMENTARY PARTICLES AND FIELDS PIONS PSEUDOSCALAR MESONS QUANTUM CHROMODYNAMICS QUANTUM FIELD THEORY RENORMALIZATION SPACE-TIME WAVE FUNCTIONS
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Beschreibung
Zusammenfassung:	We give the normalized leading asymptotic Q/sup 2/ dependence of the pion form factor in quantum chromodynamics: F/sub (/(Q/sup 2/) ..-->.. /sub Q/2/sub arrow-rightplus-or-minusinfinity/-2f/sub (/ /sup 2//bQ/sup 2/lnvertical-barQ/sup 2/vertical-bar, where f/sub (/ is the pion decay constant and b = (11-2/3N/sub f/)/16..pi../sup 2/. Up to non--leading-logarithmic corrections, this is equivalent to F/sub (/(Q/sup 2/) ..-->.. /sub Q/2/sub arrow-rightplus-or-minusinfinity/8..pi cap alpha../sub s/(Q/sup 2/) f/sub (/ /sup 2//(-Q/sup 2/). These results are obtained by solving the light-cone pion Bethe-Salpeter equation in quantum chromodynamics to leading-logarithmic accuracy.
ISSN:	0031-9007
DOI:	10.1103/PhysRevLett.43.246