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FIZIKA B 17 (2008) 1, 67 - 76
 
AXIAL AND ELECTROMAGNETIC NUCLEON FORM FACTORS IN THE UNPHYSICAL REGION
C. ADAMUSCÍNa, E. A. KURAEVb, E. TOMASI-GUSTAFSSONc
and F. E. MAASd
aDepartment of Theoretical Physics, IOP, Slovak Academy of Sciences,
Bratislava, Slovakia
bJINR-BLTP, 141980 Dubna, Moscow region, Russian Federation
cDAPNIA/SPhN, CEA/Saclay, 91191 Gif-sur-Yvette Cedex, France
dCNRS/INP3, IPN Orsay , 91400 Orsay Cedex, FranceReceived 23
October 2007; Accepted 20 February 2008
Online 18 June 2008
We study the annihilation channel in antiproton-nucleon collisions with
production of a single charged or neutral pion and a lepton-antilepton pair.
These processes offer a unique possibility to study the nucleon electromagnetic
form factors in the unphysical region. The differential cross section in an
experimental set-up, where the pion is fully detected, is given with explicit
dependence on the relevant nucleon form factors.
PACS numbers: 25.30.Bf, 13.40.-f, 13.40.Gp
UDC 539.126
Keywords: antiproton-nucleon collision, nucleon electromagnetic form factors,
unphysical region
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