Elastic scattering of virtual photons via a quark loop in the double-logarithmic approximation

B. I. Ermolaev, D. Yu Ivanov, S. I. Troyan

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

We calculate the amplitude of elastic photon-photon scattering via a single quark loop in the double-logarithmic approximation, presuming all external photons to be off-shell and unpolarized. At the same time we account for the running coupling effects. We consider this process in the forward kinematics at arbitrary relations between t and the external photon virtualities. We obtain explicit expressions for the photon-photon scattering amplitudes in all double-logarithmic kinematic regions. Then we calculate the small-x asymptotics of the obtained amplitudes and compare them with the parent amplitudes, thereby fixing the applicability regions of the asymptotics, i.e., fixing the applicability region for the nonvacuum Reggeons. We find that these Reggeons should be used at x<10-8 only.

Original languageEnglish
Article number076007
Number of pages14
JournalPhysical Review D
Volume97
Issue number7
DOIs
Publication statusPublished - 13 Apr 2018

Keywords

  • TOTAL CROSS-SECTION
  • POMERANCHUK SINGULARITY
  • DIPOLE PICTURE
  • HIGH-ENERGIES
  • IMPACT FACTOR
  • BFKL POMERON
  • QCD POMERON
  • COLLISIONS
  • LEP
  • EXCHANGE

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