Determination of the pion charge form factor for Q²=0.60-1.60 GeV²

The Fpi-1 collaboration: V. Tadevosyan , H.P. Blok , G.M. Huber , D. Abbott , H. Anklin , C. Armstrong , J. Arrington , K. Assamagan

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S. Avery O.K. Baker C. Bochna E.J. Brash H. Breuer N. Chant J. Dunne T. Eden R. Ent D. Gaskell R. Gilman K. Gustafsson W. Hinton H. Jackson M.K. Jones C. Keppel P.H. Kim W. Kim A. Klein D. Koltenuk M. Liang G.J. Lolos A. Lung D.J. Mack D. McKee D. Meekins J. Mitchell H. Mkrtchyan B. Mueller G. Niculescu I. Niculescu D. Pitz D. Potterveld L.M. Qin J. Reinhold I.K. Shin S. Stepanyan L.G. Tang R.L.J. van der Meer K. Vansyoc D. van Westrum J. Volmer W. Vulcan S. Wood C. Yan W.-X. Zhao B. Zihlmann

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keywords valuescrossfactorformlongitudinalpionusedanalysis

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The data analysis for the reaction H(e,e' pi^+)n, which was used to determine values for the charged pion form factor Fpi for values of Q^2=0.6-1.6 GeV^2, has been repeated with careful inspection of all steps and special attention to systematic uncertainties. Also the method used to extract Fpi from the measured longitudinal cross section was critically reconsidered. Final values for the separated longitudinal and transverse cross sections and the extracted values of Fpi are presented.

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Extraction of Pion Unpolarized Quark Generalized Parton Distribution from Charge Form Factors
hep-ph 2026-04 unverdicted novelty 4.0

Pion unpolarized quark GPDs at zero skewness are extracted from a data-driven fit to the electromagnetic form factor and PDFs using a parameterized form factor embedded in a PDF-plus-profile GPD framework.