Details

Autor(en) / Beteiligte

• Horn, T.
• Beise, E. J.
• Breuer, H.
• Chang, C. C.
• King, P. M.
• Liu, J.
• Roos, P. G.
• Aniol, K.
• Margaziotis, D. J.
• Arrington, J.
• Holt, R. J.
• Potterveld, D.
• Reimer, P.
• Zheng, X.
• Barrett, B.
• Sarty, A.
• Blok, H. P.
• Tvaskis, V.
• NIKHEF, Postbus 41882, NL-1009 DB Amsterdam
• Boeglin, W.
• Markowitz, P.

Titel

Determination of the Pion Charge Form Factor at Q{sup 2}=1.60 and 2.45 (GeV/c){sup 2}

Ist Teil von

• Physical review letters, 2006-11, Vol.97 (19)

Ort / Verlag

United States

Erscheinungsjahr

2006

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• The {sup 1}H(e,e{sup '}{pi}{sup +})n cross section was measured at four-momentum transfers of Q{sup 2}=1.60 and 2.45 GeV{sup 2} at an invariant mass of the photon nucleon system of W=2.22 GeV. The charged pion form factor (F{sub {pi}}) was extracted from the data by comparing the separated longitudinal pion electroproduction cross section to a Regge model prediction in which F{sub {pi}} is a free parameter. The results indicate that the pion form factor deviates from the charge-radius constrained monopole form at these values of Q{sup 2} by one sigma, but is still far from its perturbative quantum chromodynamics prediction.