The ΔNγ electromagnetic transition form factors GM* (q2), GE*(q2) Article

Slaughter, MD. (2004). The ΔNγ electromagnetic transition form factors GM* (q2), GE*(q2) . NUCLEAR PHYSICS A, 740(3-4), 383-399. 10.1016/j.nuclphysa.2004.05.008

cited authors

  • Slaughter, MD

authors

abstract

  • A parameter-free, nonperturbative calculation of the ΔNγ electromagnetic transition amplitudes GM* (q2), GE*(q2), and the resonant multipole ratio REM(q2)≡ E1+3/2(q2)/M 1+3/2(q2) is performed in terms of the well-known nucleon isovector Sachs form factor GM V. Our methods are fully relativistic with conservation of the electromagnetic current guaranteed. We find that GM *(q2) decreases more rapidly than the nucleon dipole form factor when -q2≳1 GeV2/c2 and that REM(q2) remains small even for very high four-momentum transfer implying that the perturbative QCD prediction REM(q2)→1 is purely asymptotic and is valid only for extremely high q2 . © 2004 Elsevier B.V. All rights reserved.

publication date

  • August 23, 2004

published in

Digital Object Identifier (DOI)

start page

  • 383

end page

  • 399

volume

  • 740

issue

  • 3-4