QED correction forH3+

QED Vertex Correction

so we take the incoming and the outgoing electrons to be on-shell, p2 = p′2 = m2, but the photon is off-shell, q2 6= 0. Moreover, we put the vertex in the context of the complete electron line — including the external line factors, thus ū(p′)× ieΓμ × u(p). As discussed in class, this simplifies the Lorentz and Dirac structure of the vertex and allows us to write it as Γ(p, p) = Fel(q )× (p′ + p...

QED correction for H 3 +

Lorenzo Lodi,1 Oleg L. Polyansky,1,2,* Jonathan Tennyson,1 Alexander Alijah,3 and Nikolai F. Zobov2,4 1Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom 2Lobachevsky State University of Nizhny Novgorod, 23 Prospekt Gagarina, 603950, Nizhny Novgorod, Russia 3Groupe de Spectrométrie Moléculaire et Atmosphérique, GSMA, UMR CNRS 6089, Univ...

QED Vertex Correction: Working through the Algebra

Higher - Order Qed Effects and Nonlinear Qed

After a brief review of higher-order QED effects, a survey is made of novel aspects of QED with emphasis on recent experimental results in strong-field QED: nonlinear Compton scattering and multiphoton pair creation by light. 1 Higher-Order QED Effects Quantum Electrodynamics (QED) describes the interactions between charged particles that are mediated by quanta (photons) of the electromagnetic ...

QED radiative correction to spin-density matrix elements in exclusive vector meson production

QED radiative effects are considered in the case of measurement of spin-density matrix elements of diffractive ρ-meson electroproduction. Large radiative correction for r5 00 is found in the kinematics of collider experiments at HERA. The extension of the kinematical region of lepton-nucleon deep inelastic scattering to the domain of the diffractive processes provides hadronic nature of the pho...