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VOLUME 96 (2012) | ISSUE 9 | PAGE 627
Pion form factor in the range \boldsymbol{-10\leq s\leq1} GeV 2
Abstract
Based on the field-theory-inspired approach, a new expression for the pion form factor Fπ is proposed. It takes into account the pseudoscalar meson loops π+π- and K\bar K and the mixing of ρ(770) with heavier ρ(1450) and ρ(1700) resonances. The expression possesses correct analytical properties and describes the data in the wide range of the energy squared -10\leq s\leq1 GeV2 without introducing the phenomenological Blatt-Weisskopf range parameter Rπ.