Conformal Symmetry and Pion Form Factor: Soft and Hard Contributions

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dc.creatorChoi, H. -M.
dc.creatorJi, C. -R.
dc.date2006-08-14
dc.date2007-07-12
dc.date.accessioned2026-07-07T10:41:57Z
dc.date.available2026-07-07T10:41:57Z
dc.descriptionWe discuss a constraint of conformal symmetry in the analysis of the pion form factor. The usual power-law behavior of the form factor obtained in the perturbative QCD analysis can also be attained by taking negligible quark masses in the nonperturbative quark model analysis, confirming the recent AdS/CFT correspondence. We analyze the transition from soft to hard contributions in the pion form factor considering a momentum-dependent dynamical quark mass from a nonnegligible constituent quark mass at low momentum region to a negligible current quark mass at high momentum region. We find a correlation between the shape of nonperturbative quark distribution amplitude and the amount of soft and hard contributions to the pion form factor.
dc.description7 pages, 6 figures, extensively revised, to appear in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/hep-ph/0608148
dc.identifierhttp://arxiv.org/abs/hep-ph/0608148
dc.identifierPhys.Rev.D74:093010,2006
dc.identifierdoi:10.1103/PhysRevD.74.093010
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/181786
dc.subjectHigh Energy Physics - Phenomenology
dc.titleConformal Symmetry and Pion Form Factor: Soft and Hard Contributions
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