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Measurement of the charged pion electromagnetic form factor |
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| Authors: | Volmer J Abbott D Anklin H Armstrong C Arrington J Assamagan K Avery S Baker O K Blok H P Bochna C Brash E J Breuer H Chant N Dunne J Eden T Ent R Gaskell D Gilman R Gustafsson K Hinton W Huber G M Jackson H Jones M K Keppel C Kim P H Kim W Klein A Koltenuk D Liang M Lolos G J Lung A Mack D J McKee D Meekins D Mitchell J Mkrtchyan H Mueller B Niculescu G Niculescu I Pitz D Potterveld D Qin L M Reinhold J Shin I K Stepanyan S Tadevosyan V Tang L G van der Meer R L Vansyoc K Van Westrum D Vulcan W Wood S Yan C Zhao W X Zihlmann B;Teh Jefferson Lab F Collaboration |
| Institution: | NIKHEF, Amsterdam, The Netherlands. |
| Abstract: | Separated longitudinal and transverse structure functions for the reaction 1H(e,e(')pi(+))n were measured in the momentum transfer region Q2 = 0.6--1.6 (GeV/c)(2) at a value of the invariant mass W = 1.95 GeV. New values for the pion charge form factor were extracted from the longitudinal cross section by using a recently developed Regge model. The results indicate that the pion form factor in this region is larger than previously assumed and is consistent with a monopole parametrization fitted to very low Q2 elastic data. |
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